int _tmain(int argc, _TCHAR* argv[])
{
transmiter tr;
AWGN_Channel awg;
receiver rec;
GlobalRNG_randomize();
BERC brHS_DPCCH,brDPCCH,brE_DPCCH,brE_DPDCH1,brE_DPDCH2,brE_DPDCH3,brE_DPDCH4;
vec berHS_DPCCH,berDPCCH,berE_DPCCH,berE_DPDCH1,berE_DPDCH2,berE_DPDCH3,berE_DPDCH4;
vec EbN0dB,EbN0,N0;
ofstream out;
int numOfIteration=1000;
int numOfErrors=100;
double Eb;
EbN0dB=linspace(-20,6,14);
EbN0=pow(10,EbN0dB/10.0);
Eb=tr.betaDPCCHlin+tr.betaE_DPCCHlin+tr.betaE_DPDCH1lin+tr.betaE_DPDCH2lin+tr.betaE_DPDCH3lin
+tr.betaE_DPDCH4lin+tr.betaE_HS_DPCCHlin;
N0=Eb*pow(EbN0,-1.0);
berHS_DPCCH.set_size(EbN0dB.length(),false);
berDPCCH.set_size(EbN0dB.length(),false);
berE_DPCCH.set_size(EbN0dB.length(),false);
berE_DPDCH1.set_size(EbN0dB.length(),false);
berE_DPDCH2.set_size(EbN0dB.length(),false);
berE_DPDCH3.set_size(EbN0dB.length(),false);
berE_DPDCH4.set_size(EbN0dB.length(),false);
for(int i=0;i<EbN0dB.length();i++)
{
brDPCCH.clear();
brHS_DPCCH.clear();
brE_DPCCH.clear();
brE_DPDCH1.clear();
brE_DPDCH2.clear();
brE_DPDCH3.clear();
brE_DPDCH4.clear();
cout<<"Eb N0: "<<EbN0dB(i)<<endl;
for(int j=0;j<numOfIteration;j++)
{
cout<<"Num of Iteration: "<<j+1<<endl;
//DPCCH
tr.SP_DPCCH=tr.spreading(tr.DPCCH,tr.OVSF256_0);
//HS-DPCCH
tr.HS_DPCCH=randb(tr.HS_DPCCH_NBits);
tr.SP_HS_DPCCH=tr.spreading(tr.HS_DPCCH,tr.OVSF256_33);
//E-DPCCH
tr.E_DPCCH=randb(tr.E_DPCCH_NBits);
tr.SP_E_DPCCH=tr.spreading(tr.E_DPCCH,tr.OVSF256_1);
//E-DPDCH
tr.E_DPDCH1=randb(tr.E_DPDCH1_NData);
tr.E_DPDCH2=randb(tr.E_DPDCH2_NData);
tr.E_DPDCH3=randb(tr.E_DPDCH3_NData);
tr.E_DPDCH4=randb(tr.E_DPDCH4_NData);
tr.SP_E_DPDCH1=tr.spreading(tr.E_DPDCH1,tr.OVSF2_1);
tr.SP_E_DPDCH2=tr.spreading(tr.E_DPDCH2,tr.OVSF2_1);
tr.SP_E_DPDCH3=tr.spreading(tr.E_DPDCH3,tr.OVSF4_1);
tr.SP_E_DPDCH4=tr.spreading(tr.E_DPDCH4,tr.OVSF4_1);
//beta
tr.SP_DPCCH=tr.SP_DPCCH*tr.betaDPCCHlin;
tr.SP_HS_DPCCH=tr.SP_HS_DPCCH*tr.betaE_HS_DPCCHlin;
tr.SP_E_DPCCH=tr.SP_E_DPCCH*tr.betaE_DPCCHlin;
tr.SP_E_DPDCH1=tr.SP_E_DPDCH1*tr.betaE_DPDCH1lin;
tr.SP_E_DPDCH2=tr.SP_E_DPDCH2*tr.betaE_DPDCH2lin;
tr.SP_E_DPDCH3=tr.SP_E_DPDCH3*tr.betaE_DPDCH3lin;
tr.SP_E_DPDCH4=tr.SP_E_DPDCH4*tr.betaE_DPDCH4lin;
//radio frame
tr.radioFrame.set_length(tr.gold.numG);
for(int i=0;i<tr.gold.numG;i++)
{
tr.radioFrame[i]._Val[0]=tr.SP_E_DPCCH[i]+tr.SP_E_DPDCH1[i]+tr.SP_E_DPDCH3[i];
tr.radioFrame[i]._Val[1]=tr.SP_DPCCH[i]+tr.SP_HS_DPCCH[i]+tr.SP_E_DPDCH2[i]+tr.SP_E_DPDCH4[i];
}
cvec radioFrameScrambling,radioFrameDescr,channel;
radioFrameScrambling=tr.scrambling(tr.radioFrame,tr.gold.c);
//kanal
awg.set_noise(N0(i));
channel=awg(radioFrameScrambling);
//odbiornik
radioFrameDescr=rec.descrambling(channel,tr.gold.cConjugate);
rec.rRecive=real(radioFrameDescr);
rec.iRecive=imag(radioFrameDescr);
rec.DPCCH=rec.despreading(tr.DPCCH_NBits,tr.OVSF256_0,true);
rec.E_DPCCH=rec.despreading(tr.E_DPCCH_NBits,tr.OVSF256_1,false);
rec.HS_DPCCH=rec.despreading(tr.HS_DPCCH_NBits,tr.OVSF256_33,true);
rec.E_DPDCH1=rec.despreading(tr.E_DPDCH1_NData,tr.OVSF2_1,false);
rec.E_DPDCH2=rec.despreading(tr.E_DPDCH2_NData,tr.OVSF2_1,true);
rec.E_DPDCH3=rec.despreading(tr.E_DPDCH3_NData,tr.OVSF4_1,false);
rec.E_DPDCH4=rec.despreading(tr.E_DPDCH4_NData,tr.OVSF4_1,true);
brDPCCH.count(tr.DPCCH,rec.DPCCH);
brHS_DPCCH.count(tr.HS_DPCCH,rec.HS_DPCCH);
brE_DPCCH.count(tr.E_DPCCH,rec.E_DPCCH);
brE_DPDCH1.count(tr.E_DPDCH1,rec.E_DPDCH1);
brE_DPDCH2.count(tr.E_DPDCH2,rec.E_DPDCH2);
brE_DPDCH3.count(tr.E_DPDCH3,rec.E_DPDCH3);
brE_DPDCH4.count(tr.E_DPDCH4,rec.E_DPDCH4);
berDPCCH(i)=brDPCCH.get_errorrate();
berHS_DPCCH(i)=brHS_DPCCH.get_errorrate();
berE_DPCCH(i)=brE_DPCCH.get_errorrate();
berE_DPDCH1(i)=brE_DPDCH1.get_errorrate();
berE_DPDCH2(i)=brE_DPDCH2.get_errorrate();
berE_DPDCH3(i)=brE_DPDCH3.get_errorrate();
berE_DPDCH4(i)=brE_DPDCH4.get_errorrate();
cout<<"errors DPCCH: "<<brDPCCH.get_errors()<<" errors HS-DPCCH: "<<brHS_DPCCH.get_errors()<<" errors E-DPCCH: "
<<brE_DPCCH.get_errors()<<" errors E-DPDCH1: "<<brE_DPDCH1.get_errors()<<" errors E-DPDCH2: "<<brE_DPDCH2.get_errors()
<<" errors E-DPDCH3: "<<brE_DPDCH3.get_errors()<<" errors E-DPDCH4: "<<brE_DPDCH4.get_errors()<<endl;
if(brDPCCH.get_errors()>numOfErrors && brE_DPCCH.get_errors()>numOfErrors && brHS_DPCCH.get_errors()>numOfErrors
&& brE_DPDCH1.get_errors()>numOfErrors && brE_DPDCH2.get_errors()>numOfErrors &&brE_DPDCH3.get_errors()>numOfErrors
&& brE_DPDCH4.get_errors()>numOfErrors)
{
break;
}
}
}
//stats
out.open("BER.csv", ios_base::out | ios_base::trunc);
out<<"Eb/N0"<<';'<<"BER DPCCH"<<';'<<"BER HS_DPCCH"<<';'<<"BER E_DPCCH"<<';'<<"BER E_DPDCH1"<<';'
<<"BER E_DPDCH2"<<';'<<"BER E_DPDCH3"<<';'<<"BER E_DPDCH4"<<endl;
for(int i=0;i<EbN0dB.length();i++)
{
out<<EbN0dB(i)<<';'<<berDPCCH(i)<<';'<<berHS_DPCCH(i)<<';'<<berE_DPCCH(i)<<';'<<berE_DPDCH1(i)<<';'
<<berE_DPDCH2(i)<<';'<<berE_DPDCH3(i)<<';'<<berE_DPDCH4(i)<<endl;
}
out.close();
/*
BERC br;
br.count(tr.DPCCH,rec.DPCCH);
cout<<"bledy DPCCH"<<endl;
cout<<br.get_errors()<<endl;
cout<<"BER DPCCH"<<endl;
cout<<br.get_errorrate()<<endl;
br.clear();
br.count(tr.E_DPCCH,rec.E_DPCCH);
cout<<"bledy E-DPCCH"<<endl;
cout<<br.get_errors()<<endl;
cout<<"BER E-DPCCH"<<endl;
cout<<br.get_errorrate()<<endl;
br.clear();
br.count(tr.HS_DPCCH,rec.HS_DPCCH);
cout<<"bledy HS-DPCCH"<<endl;
cout<<br.get_errors()<<endl;
cout<<"BER HS-DPCCH"<<endl;
cout<<br.get_errorrate()<<endl;
br.clear();
br.count(tr.E_DPDCH1,rec.E_DPDCH1);
cout<<"bledy E-DPDCH1"<<endl;
cout<<br.get_errors()<<endl;
cout<<"BER E-DPDCH1"<<endl;
cout<<br.get_errorrate()<<endl;
br.clear();
br.count(tr.E_DPDCH2,rec.E_DPDCH2);
cout<<"bledy E-DPDCH2"<<endl;
cout<<br.get_errors()<<endl;
cout<<"BER E-DPDCH2"<<endl;
cout<<br.get_errorrate()<<endl;
br.clear();
br.count(tr.E_DPDCH3,rec.E_DPDCH3);
cout<<"bledy E-DPDCH3"<<endl;
cout<<br.get_errors()<<endl;
cout<<"BER E-DPDCH3"<<endl;
cout<<br.get_errorrate()<<endl;
br.clear();
br.count(tr.E_DPDCH4,rec.E_DPDCH4);
cout<<"bledy E-DPDCH4"<<endl;
cout<<br.get_errors()<<endl;
cout<<"BER E-DPDCH4"<<endl;
cout<<br.get_errorrate()<<endl;
*/
return 0;
}
int main(void)
{
//general parameters
double threshold_value = 10;
string map_metric="maxlogMAP";
ivec gen = "07 05";//octal form, feedback first
int constraint_length = 3;
int nb_errors_lim = 3000;
int nb_bits_lim = int(1e6);
int perm_len = (1<<14);//total number of bits in a block (with tail)
int nb_iter = 10;//number of iterations in the turbo decoder
vec EbN0_dB = "0:0.1:5";
double R = 1.0/3.0;//coding rate (non punctured PCCC)
double Ec = 1.0;//coded bit energy
//other parameters
int nb_bits = perm_len-(constraint_length-1);//number of bits in a block (without tail)
vec sigma2 = (0.5*Ec/R)*pow(inv_dB(EbN0_dB), -1.0);//N0/2
double Lc;//scaling factor
int nb_blocks;//number of blocks
int nb_errors;
ivec perm(perm_len);
ivec inv_perm(perm_len);
bvec bits(nb_bits);
int cod_bits_len = perm_len*gen.length();
bmat cod1_bits;//tail is added
bvec tail;
bvec cod2_input;
bmat cod2_bits;
int rec_len = int(1.0/R)*perm_len;
bvec coded_bits(rec_len);
vec rec(rec_len);
vec dec1_intrinsic_coded(cod_bits_len);
vec dec2_intrinsic_coded(cod_bits_len);
vec apriori_data(perm_len);//a priori LLR for information bits
vec extrinsic_coded(perm_len);
vec extrinsic_data(perm_len);
bvec rec_bits(perm_len);
int snr_len = EbN0_dB.length();
mat ber(nb_iter,snr_len);
ber.zeros();
register int en,n;
//Recursive Systematic Convolutional Code
Rec_Syst_Conv_Code cc;
cc.set_generator_polynomials(gen, constraint_length);//initial state should be the zero state
//BPSK modulator
BPSK bpsk;
//AWGN channel
AWGN_Channel channel;
//SISO modules
SISO siso;
siso.set_generators(gen, constraint_length);
siso.set_map_metric(map_metric);
//BER
BERC berc;
//Randomize generators
RNG_randomize();
//main loop
for (en=0;en<snr_len;en++)
{
cout << "EbN0_dB = " << EbN0_dB(en) << endl;
channel.set_noise(sigma2(en));
Lc = -2/sigma2(en);//normalisation factor for intrinsic information (take into account the BPSK mapping)
nb_errors = 0;
nb_blocks = 0;
while ((nb_errors<nb_errors_lim) && (nb_blocks*nb_bits<nb_bits_lim))
{
//permutation
perm = sort_index(randu(perm_len));
//inverse permutation
inv_perm = sort_index(perm);
//bits generation
bits = randb(nb_bits);
//parallel concatenated convolutional code
cc.encode_tail(bits, tail, cod1_bits);//tail is added here to information bits to close the trellis
cod2_input = concat(bits, tail);
cc.encode(cod2_input(perm), cod2_bits);
for (n=0;n<perm_len;n++)//output with no puncturing
{
coded_bits(3*n) = cod2_input(n);//systematic output
coded_bits(3*n+1) = cod1_bits(n,0);//first parity output
coded_bits(3*n+2) = cod2_bits(n,0);//second parity output
}
//BPSK modulation (1->-1,0->+1) + AWGN channel
rec = channel(bpsk.modulate_bits(coded_bits));
//form input for SISO blocks
for (n=0;n<perm_len;n++)
{
dec1_intrinsic_coded(2*n) = Lc*rec(3*n);
dec1_intrinsic_coded(2*n+1) = Lc*rec(3*n+1);
dec2_intrinsic_coded(2*n) = 0.0;//systematic output of the CC is already used in decoder1
dec2_intrinsic_coded(2*n+1) = Lc*rec(3*n+2);
}
//turbo decoder
apriori_data.zeros();//a priori LLR for information bits
for (n=0;n<nb_iter;n++)
{
//first decoder (terminated trellis)
siso.rsc(extrinsic_coded, extrinsic_data, dec1_intrinsic_coded, apriori_data, true);
//interleave
apriori_data = extrinsic_data(perm);
//threshold
apriori_data = SISO::threshold(apriori_data, threshold_value);
//second decoder (unterminated trellis)
siso.rsc(extrinsic_coded, extrinsic_data, dec2_intrinsic_coded, apriori_data);
//decision
apriori_data += extrinsic_data;//a posteriori information
rec_bits = bpsk.demodulate_bits(-apriori_data(inv_perm));//take into account the BPSK mapping
//count errors
berc.clear();
berc.count(bits, rec_bits.left(nb_bits));
ber(n,en) += berc.get_errorrate();
//deinterleave for the next iteration
apriori_data = extrinsic_data(inv_perm);
}//end iterations
nb_errors += int(berc.get_errors());//get number of errors at the last iteration
nb_blocks++;
}//end blocks (while loop)
//compute BER over all tx blocks
ber.set_col(en, ber.get_col(en)/nb_blocks);
}
it_file ff("pccc_bersim_awgn.it");
ff << Name("EbN0_dB") << EbN0_dB;
ff << Name("BER") << ber;
ff.close();
return 0;
}
int main(void)
{
//general parameters
double threshold_value = 50;
string map_metric="logMAP";
ivec gen = "037 021";//octal form
int constraint_length = 5;
int nb_errors_lim = 1500;
int nb_bits_lim = int(1e6);
int perm_len = pow2i(14);//permutation length
int nb_iter = 10;//number of iterations in the turbo decoder
vec EbN0_dB = "0:0.1:5";
double R = 1.0/4.0;//coding rate (non punctured SCCC)
double Ec = 1.0;//coded bit energy
//other parameters
string filename = "Res/sccc_"+map_metric+".it";
int nb_bits_tail = perm_len/gen.length();
int nb_bits = nb_bits_tail-(constraint_length-1);//number of bits in a block (without tail)
vec sigma2 = (0.5*Ec/R)*pow(inv_dB(EbN0_dB), -1.0);//N0/2
double Lc;//scaling factor for intrinsic information
int nb_blocks;//number of blocks
int nb_errors;
bvec bits(nb_bits);//data bits
bvec nsc_coded_bits;//tail is added
bmat rsc_parity_bits;
ivec perm(perm_len);
ivec inv_perm(perm_len);
int rec_len = gen.length()*perm_len;
bvec coded_bits(rec_len);
vec rec(rec_len);
//SISO RSC
vec rsc_intrinsic_coded(rec_len);
vec rsc_apriori_data(perm_len);
vec rsc_extrinsic_coded;
vec rsc_extrinsic_data;
//SISO NSC
vec nsc_intrinsic_coded(perm_len);
vec nsc_apriori_data(nb_bits_tail);
nsc_apriori_data.zeros();//always zero
vec nsc_extrinsic_coded;
vec nsc_extrinsic_data;
//decision
bvec rec_bits(nb_bits_tail);
int snr_len = EbN0_dB.length();
mat ber(nb_iter,snr_len);
ber.zeros();
register int en,n;
//Non recursive non Systematic Convolutional Code
Convolutional_Code nsc;
nsc.set_generator_polynomials(gen, constraint_length);
//Recursive Systematic Convolutional Code
Rec_Syst_Conv_Code rsc;
rsc.set_generator_polynomials(gen, constraint_length);//initial state should be the zero state
//BPSK modulator
BPSK bpsk;
//AWGN channel
AWGN_Channel channel;
//SISO blocks
SISO siso;
siso.set_generators(gen, constraint_length);
siso.set_map_metric(map_metric);
//BER
BERC berc;
//Progress timer
tr::Progress_Timer timer;
timer.set_max(snr_len);
//Randomize generators
RNG_randomize();
//main loop
timer.progress(0.0);
for (en=0;en<snr_len;en++)
{
channel.set_noise(sigma2(en));
Lc = -2.0/sigma2(en);//take into account the BPSK mapping
nb_errors = 0;
nb_blocks = 0;
while ((nb_errors<nb_errors_lim) && (nb_blocks*nb_bits<nb_bits_lim))//if at the last iteration the nb. of errors is inferior to lim, then process another block
{
//permutation
perm = sort_index(randu(perm_len));
//inverse permutation
inv_perm = sort_index(perm);
//bits generation
bits = randb(nb_bits);
//serial concatenated convolutional code
nsc.encode_tail(bits, nsc_coded_bits);//tail is added here to information bits to close the trellis
nsc_coded_bits = nsc_coded_bits(perm);//interleave
rsc.encode(nsc_coded_bits, rsc_parity_bits);//no tail added
for(n=0;n<perm_len;n++)
{
coded_bits(2*n) = nsc_coded_bits(n);//systematic output
coded_bits(2*n+1) = rsc_parity_bits(n,0);//parity output
}
//BPSK modulation (1->-1,0->+1) + channel
rec = channel(bpsk.modulate_bits(coded_bits));
//turbo decoder
rsc_intrinsic_coded = Lc*rec;//intrinsic information of coded bits
rsc_apriori_data.zeros();//a priori LLR for information bits
for (n=0;n<nb_iter;n++)
{
//first decoder
siso.rsc(rsc_extrinsic_coded, rsc_extrinsic_data, rsc_intrinsic_coded, rsc_apriori_data, false);
//deinterleave+threshold
nsc_intrinsic_coded = threshold(rsc_extrinsic_data(inv_perm), threshold_value);
//second decoder
siso.nsc(nsc_extrinsic_coded, nsc_extrinsic_data, nsc_intrinsic_coded, nsc_apriori_data, true);
//decision
rec_bits = bpsk.demodulate_bits(-nsc_extrinsic_data);//suppose that a priori info is zero
//count errors
berc.clear();
berc.count(bits, rec_bits.left(nb_bits));
ber(n,en) += berc.get_errorrate();
//interleave
rsc_apriori_data = nsc_extrinsic_coded(perm);
}//end iterations
nb_errors += int(berc.get_errors());//get number of errors at the last iteration
nb_blocks++;
}//end blocks (while loop)
//compute BER over all tx blocks
ber.set_col(en, ber.get_col(en)/nb_blocks);
//show progress
timer.progress(1+en);
}
timer.toc_print();
#ifdef TO_FILE
//save results to file
it_file ff(filename);
ff << Name("BER") << ber;
ff << Name("EbN0_dB") << EbN0_dB;
ff << Name("gen") << gen;
ff << Name("R") << R;
ff << Name("nb_iter") << nb_iter;
ff << Name("total_nb_bits") << nb_bits;
ff << Name("nb_errors_lim") << nb_errors_lim;
ff << Name("nb_bits_lim") << nb_bits_lim;
ff.close();
#else
//show BER
cout << ber << endl;
#endif
return 0;
}
int _tmain(int argc, _TCHAR* argv[])
{
Parser p(std::string("config.txt"));
transmiter tr;
AWGN_Channel awg;
receiver rec;
GlobalRNG_randomize();
BERC brHS_DPCCH,brDPCCH,brE_DPCCH,brE_DPDCH1,brE_DPDCH2,brE_DPDCH3,brE_DPDCH4;
vec berHS_DPCCH,berDPCCH,berE_DPCCH,berE_DPDCH1,berE_DPDCH2,berE_DPDCH3,berE_DPDCH4;
vec EbN0dB,EbN0,N0;
ofstream out;
int numOfIteration=p.get_int("numOfIteration");
int numOfErrors=100;
double Eb;
EbN0dB=linspace(-20,2,12);
EbN0=pow(10,EbN0dB/10.0);
Eb=tr.betaDPCCHlin+tr.betaE_DPCCHlin+tr.betaE_DPDCH1lin+tr.betaE_DPDCH2lin+tr.betaE_DPDCH3lin
+tr.betaE_DPDCH4lin+tr.betaE_HS_DPCCHlin;
N0=Eb*pow(EbN0,-1.0);
berHS_DPCCH.set_size(EbN0dB.length(),false);
berDPCCH.set_size(EbN0dB.length(),false);
berE_DPCCH.set_size(EbN0dB.length(),false);
berE_DPDCH1.set_size(EbN0dB.length(),false);
berE_DPDCH2.set_size(EbN0dB.length(),false);
berE_DPDCH3.set_size(EbN0dB.length(),false);
berE_DPDCH4.set_size(EbN0dB.length(),false);
TDL_Channel tdlChanel;
CHANNEL_PROFILE chProfile;
chProfile= ITU_Vehicular_A;
double samplingTime=(0.5)/(38.4e6);
tdlChanel.set_channel_profile(chProfile,samplingTime);
vec powerdB;
ivec delayPath;
tdlChanel.get_channel_profile(powerdB,delayPath);
cout<<delayPath<<endl;
cvec path1,path2,path3,path4,path5,path6;
cvec radioFrameScrambling,radioFrameALL,radioFrameDescr,radioFrameChannel1,radioFrameChannel2;
cmat coffeChannel;
tdlChanel.init();
cvec mulPath1,mulPath2,mulPath3,mulPath4,mulPath5,mulPath6,sum;
mulPath1.set_length(38400);
mulPath2.set_length(38400);
mulPath3.set_length(38400);
mulPath4.set_length(38400);
mulPath5.set_length(38400);
mulPath6.set_length(38400);
sum.set_length(38400);
for(int i=0;i<EbN0dB.length();i++)
{
brDPCCH.clear();
brHS_DPCCH.clear();
brE_DPCCH.clear();
brE_DPDCH1.clear();
brE_DPDCH2.clear();
brE_DPDCH3.clear();
brE_DPDCH4.clear();
cout<<"Eb N0: "<<EbN0dB(i)<<endl;
tr.E_DPCCHall.set_size(0);
tr.DPCCHall.set_size(0);
tr.HS_DPCCHall.set_size(0);
tr.E_DPDCH1all.set_size(0);
tr.E_DPDCH2all.set_size(0);
tr.E_DPDCH3all.set_size(0);
tr.E_DPDCH4all.set_size(0);
for(int k=0;k<numOfIteration;k++)
{
cout<<"Num of Iteration: "<<k+1<<endl;
//DPCCH
tr.SP_DPCCH=tr.spreading(tr.DPCCH,tr.OVSF256_0);
tr.DPCCHall=concat(tr.DPCCHall,tr.DPCCH);
//HS-DPCCH
tr.HS_DPCCH=randb(tr.HS_DPCCH_NBits);
tr.HS_DPCCHall=concat(tr.HS_DPCCHall,tr.HS_DPCCH);
tr.SP_HS_DPCCH=tr.spreading(tr.HS_DPCCH,tr.OVSF256_33);
//E-DPCCH
tr.E_DPCCH=randb(tr.E_DPCCH_NBits);
tr.E_DPCCHall=concat(tr.E_DPCCHall,tr.E_DPCCH);
tr.SP_E_DPCCH=tr.spreading(tr.E_DPCCH,tr.OVSF256_1);
//E-DPDCH
tr.E_DPDCH1=randb(tr.E_DPDCH1_NData);
tr.E_DPDCH2=randb(tr.E_DPDCH2_NData);
tr.E_DPDCH3=randb(tr.E_DPDCH3_NData);
tr.E_DPDCH4=randb(tr.E_DPDCH4_NData);
tr.E_DPDCH1all=concat(tr.E_DPDCH1,tr.E_DPDCH1all);
tr.E_DPDCH2all=concat(tr.E_DPDCH2,tr.E_DPDCH2all);
tr.E_DPDCH3all=concat(tr.E_DPDCH3,tr.E_DPDCH3all);
tr.E_DPDCH4all=concat(tr.E_DPDCH4,tr.E_DPDCH4all);
tr.SP_E_DPDCH1=tr.spreading(tr.E_DPDCH1,tr.OVSF2_1);
tr.SP_E_DPDCH2=tr.spreading(tr.E_DPDCH2,tr.OVSF2_1);
tr.SP_E_DPDCH3=tr.spreading(tr.E_DPDCH3,tr.OVSF4_1);
tr.SP_E_DPDCH4=tr.spreading(tr.E_DPDCH4,tr.OVSF4_1);
//beta
tr.SP_DPCCH=tr.SP_DPCCH*tr.betaDPCCHlin;
tr.SP_HS_DPCCH=tr.SP_HS_DPCCH*tr.betaE_HS_DPCCHlin;
tr.SP_E_DPCCH=tr.SP_E_DPCCH*tr.betaE_DPCCHlin;
tr.SP_E_DPDCH1=tr.SP_E_DPDCH1*tr.betaE_DPDCH1lin;
tr.SP_E_DPDCH2=tr.SP_E_DPDCH2*tr.betaE_DPDCH2lin;
tr.SP_E_DPDCH3=tr.SP_E_DPDCH3*tr.betaE_DPDCH3lin;
tr.SP_E_DPDCH4=tr.SP_E_DPDCH4*tr.betaE_DPDCH4lin;
//radio frame
tr.radioFrame.set_length(tr.gold.numG);
for(int i=0;i<tr.gold.numG;i++)
{
tr.radioFrame[i]._Val[0]=tr.SP_E_DPCCH[i]+tr.SP_E_DPDCH1[i]+tr.SP_E_DPDCH3[i];
tr.radioFrame[i]._Val[1]=tr.SP_DPCCH[i]+tr.SP_HS_DPCCH[i]+tr.SP_E_DPDCH2[i]+tr.SP_E_DPDCH4[i];
}
radioFrameScrambling=tr.scrambling(tr.radioFrame,tr.gold.c);
radioFrameALL=concat(radioFrameALL,radioFrameScrambling);
}
//kanal
awg.set_noise(N0(i));
radioFrameChannel1=awg(radioFrameALL);
tdlChanel(radioFrameChannel1,radioFrameChannel2,coffeChannel);
//odbiornik
coffeChannel=conj(coffeChannel);
path1.set_length(38400*numOfIteration);
path2.set_length(38400*numOfIteration);
path3.set_length(38400*numOfIteration);
path4.set_length(38400*numOfIteration);
path5.set_length(38400*numOfIteration);
path6.set_length(38400*numOfIteration);
path1.zeros();
path2.zeros();
path3.zeros();
path4.zeros();
path5.zeros();
path6.zeros();
for(int i=0;i<38400*numOfIteration;i++)
{
path1(i)=radioFrameChannel2(i);
if(delayPath(1)+i<38400*numOfIteration)
{
path2(i)=radioFrameChannel2(i+delayPath(1));
}
if(delayPath(2)+i<38400*numOfIteration)
{
path3(i)=radioFrameChannel2(i+delayPath(2));
}
if(delayPath(3)+i<38400*numOfIteration)
{
path4(i)=radioFrameChannel2(i+delayPath(3));
}
if(delayPath(4)+i<38400*numOfIteration)
{
path5(i)=radioFrameChannel2(i+delayPath(4));
}
if(delayPath(5)+i<38400*numOfIteration)
{
path6(i)=radioFrameChannel2(i+delayPath(5));
}
}
cvec path1Descrambling,path2Descrambling,path3Descrambling,path4Descrambling,path5Descrambling,path6Descrambling;
vec path1DescramblingReal,path2DescramblingReal,path3DescramblingReal,path4DescramblingReal,path5DescramblingReal,path6DescramblingReal;
vec path1DescramblingImag,path2DescramblingImag,path3DescramblingImag,path4DescramblingImag,path5DescramblingImag,path6DescramblingImag;
vec correctionFactorPath1,correctionFactorPath2,correctionFactorPath3,correctionFactorPath4,correctionFactorPath5,correctionFactorPath6;
correctionFactorPath1.set_length(numOfIteration*38400);
correctionFactorPath2.set_length(numOfIteration*38400);
correctionFactorPath3.set_length(numOfIteration*38400);
correctionFactorPath4.set_length(numOfIteration*38400);
correctionFactorPath5.set_length(numOfIteration*38400);
correctionFactorPath6.set_length(numOfIteration*38400);
path1Descrambling.set_length(numOfIteration*38400);
path2Descrambling.set_length(numOfIteration*38400);
path3Descrambling.set_length(numOfIteration*38400);
path4Descrambling.set_length(numOfIteration*38400);
path5Descrambling.set_length(numOfIteration*38400);
path6Descrambling.set_length(numOfIteration*38400);
for(int z=0;z<numOfIteration*38400;z++)
{
correctionFactorPath1[i]=abs(coffeChannel(i,0))*EbN0(i);
correctionFactorPath2[i]=abs(coffeChannel(i,1))*EbN0(i);
correctionFactorPath3[i]=abs(coffeChannel(i,2))*EbN0(i);
correctionFactorPath4[i]=abs(coffeChannel(i,3))*EbN0(i);
correctionFactorPath5[i]=abs(coffeChannel(i,4))*EbN0(i);
correctionFactorPath6[i]=abs(coffeChannel(i,5))*EbN0(i);
}
//Descrambling
for(int z=0;z<numOfIteration*38400;z++)
{
path1Descrambling[z]=path1(z)*tr.gold.cConjugate(z%38400);
path2Descrambling[z]=path2(z)*tr.gold.cConjugate(z%38400);
path3Descrambling[z]=path3(z)*tr.gold.cConjugate(z%38400);
path4Descrambling[z]=path4(z)*tr.gold.cConjugate(z%38400);
path5Descrambling[z]=path5(z)*tr.gold.cConjugate(z%38400);
path6Descrambling[z]=path6(z)*tr.gold.cConjugate(z%38400);
}
path1DescramblingReal=real(path1Descrambling);
path2DescramblingReal=real(path2Descrambling);
path3DescramblingReal=real(path3Descrambling);
path4DescramblingReal=real(path4Descrambling);
path5DescramblingReal=real(path5Descrambling);
path6DescramblingReal=real(path6Descrambling);
path1DescramblingImag=imag(path1Descrambling);
path2DescramblingImag=imag(path2Descrambling);
path3DescramblingImag=imag(path3Descrambling);
path4DescramblingImag=imag(path4Descrambling);
path5DescramblingImag=imag(path5Descrambling);
path6DescramblingImag=imag(path6Descrambling);
vec path1HS_DPCCH,path2HS_DPCCH,path3HS_DPCCH,path4HS_DPCCH,path5HS_DPCCH,path6HS_DPCCH;
vec path1DPCCH,path2DPCCH,path3DPCCH,path4DPCCH,path5DPCCH,path6DPCCH;
vec path1E_DPCCH,path2E_DPCCH,path3E_DPCCH,path4E_DPCCH,path5E_DPCCH,path6E_DPCCH;
vec path1E_DPDCH1,path2E_DPDCH1,path3E_DPDCH1,path4E_DPDCH1,path5E_DPDCH1,path6E_DPDCH1;
vec path1E_DPDCH2,path2E_DPDCH2,path3E_DPDCH2,path4E_DPDCH2,path5E_DPDCH2,path6E_DPDCH2;
vec path1E_DPDCH3,path2E_DPDCH3,path3E_DPDCH3,path4E_DPDCH3,path5E_DPDCH3,path6E_DPDCH3;
vec path1E_DPDCH4,path2E_DPDCH4,path3E_DPDCH4,path4E_DPDCH4,path5E_DPDCH4,path6E_DPDCH4;
path1HS_DPCCH.set_length(numOfIteration*38400);
path2HS_DPCCH.set_length(numOfIteration*38400);
path3HS_DPCCH.set_length(numOfIteration*38400);
path4HS_DPCCH.set_length(numOfIteration*38400);
path5HS_DPCCH.set_length(numOfIteration*38400);
path6HS_DPCCH.set_length(numOfIteration*38400);
path1DPCCH.set_length(numOfIteration*38400);
path2DPCCH.set_length(numOfIteration*38400);
path3DPCCH.set_length(numOfIteration*38400);
path4DPCCH.set_length(numOfIteration*38400);
path5DPCCH.set_length(numOfIteration*38400);
path6DPCCH.set_length(numOfIteration*38400);
path1E_DPCCH.set_length(numOfIteration*38400);
path2E_DPCCH.set_length(numOfIteration*38400);
path3E_DPCCH.set_length(numOfIteration*38400);
path4E_DPCCH.set_length(numOfIteration*38400);
path5E_DPCCH.set_length(numOfIteration*38400);
path6E_DPCCH.set_length(numOfIteration*38400);
path1E_DPDCH1.set_length(numOfIteration*38400);
path2E_DPDCH1.set_length(numOfIteration*38400);
path3E_DPDCH1.set_length(numOfIteration*38400);
path4E_DPDCH1.set_length(numOfIteration*38400);
path5E_DPDCH1.set_length(numOfIteration*38400);
path6E_DPDCH1.set_length(numOfIteration*38400);
path1E_DPDCH2.set_length(numOfIteration*38400);
path2E_DPDCH2.set_length(numOfIteration*38400);
path3E_DPDCH2.set_length(numOfIteration*38400);
path4E_DPDCH2.set_length(numOfIteration*38400);
path5E_DPDCH2.set_length(numOfIteration*38400);
path6E_DPDCH2.set_length(numOfIteration*38400);
path1E_DPDCH3.set_length(numOfIteration*38400);
path2E_DPDCH3.set_length(numOfIteration*38400);
path3E_DPDCH3.set_length(numOfIteration*38400);
path4E_DPDCH3.set_length(numOfIteration*38400);
path5E_DPDCH3.set_length(numOfIteration*38400);
path6E_DPDCH3.set_length(numOfIteration*38400);
path1E_DPDCH4.set_length(numOfIteration*38400);
path2E_DPDCH4.set_length(numOfIteration*38400);
path3E_DPDCH4.set_length(numOfIteration*38400);
path4E_DPDCH4.set_length(numOfIteration*38400);
path5E_DPDCH4.set_length(numOfIteration*38400);
path6E_DPDCH4.set_length(numOfIteration*38400);
for(int i=0;i<numOfIteration*38400;i++)
{
//HS_DPCCH
path1HS_DPCCH[i]=path1DescramblingImag(i)*tr.OVSF256_33(i%256)*correctionFactorPath1(i);
path2HS_DPCCH[i]=path2DescramblingImag(i)*tr.OVSF256_33(i%256)*correctionFactorPath2(i);
path3HS_DPCCH[i]=path3DescramblingImag(i)*tr.OVSF256_33(i%256)*correctionFactorPath3(i);
path4HS_DPCCH[i]=path4DescramblingImag(i)*tr.OVSF256_33(i%256)*correctionFactorPath4(i);
path5HS_DPCCH[i]=path5DescramblingImag(i)*tr.OVSF256_33(i%256)*correctionFactorPath5(i);
path6HS_DPCCH[i]=path6DescramblingImag(i)*tr.OVSF256_33(i%256)*correctionFactorPath6(i);
//DPCCH
path1DPCCH[i]=path1DescramblingImag(i)*tr.OVSF256_0(i%256)*correctionFactorPath1(i);
path2DPCCH[i]=path2DescramblingImag(i)*tr.OVSF256_0(i%256)*correctionFactorPath2(i);
path3DPCCH[i]=path3DescramblingImag(i)*tr.OVSF256_0(i%256)*correctionFactorPath3(i);
path4DPCCH[i]=path4DescramblingImag(i)*tr.OVSF256_0(i%256)*correctionFactorPath4(i);
path5DPCCH[i]=path5DescramblingImag(i)*tr.OVSF256_0(i%256)*correctionFactorPath5(i);
path6DPCCH[i]=path6DescramblingImag(i)*tr.OVSF256_0(i%256)*correctionFactorPath6(i);
//E_DPCCH
path1E_DPCCH[i]=path1DescramblingReal(i)*tr.OVSF256_1(i%256)*correctionFactorPath1(i);
path2E_DPCCH[i]=path2DescramblingReal(i)*tr.OVSF256_1(i%256)*correctionFactorPath2(i);
path3E_DPCCH[i]=path3DescramblingReal(i)*tr.OVSF256_1(i%256)*correctionFactorPath3(i);
path4E_DPCCH[i]=path4DescramblingReal(i)*tr.OVSF256_1(i%256)*correctionFactorPath4(i);
path5E_DPCCH[i]=path5DescramblingReal(i)*tr.OVSF256_1(i%256)*correctionFactorPath5(i);
path6E_DPCCH[i]=path6DescramblingReal(i)*tr.OVSF256_1(i%256)*correctionFactorPath6(i);
//E_DPDCH1
path1E_DPDCH1[i]=path1DescramblingReal(i)*tr.OVSF2_1(i%2)*correctionFactorPath1(i);
path2E_DPDCH1[i]=path2DescramblingReal(i)*tr.OVSF2_1(i%2)*correctionFactorPath2(i);
path3E_DPDCH1[i]=path3DescramblingReal(i)*tr.OVSF2_1(i%2)*correctionFactorPath3(i);
path4E_DPDCH1[i]=path4DescramblingReal(i)*tr.OVSF2_1(i%2)*correctionFactorPath4(i);
path5E_DPDCH1[i]=path5DescramblingReal(i)*tr.OVSF2_1(i%2)*correctionFactorPath5(i);
path6E_DPDCH1[i]=path6DescramblingReal(i)*tr.OVSF2_1(i%2)*correctionFactorPath6(i);
//E_DPDCH2
path1E_DPDCH2[i]=path1DescramblingImag(i)*tr.OVSF2_1(i%2)*correctionFactorPath1(i);
path2E_DPDCH2[i]=path2DescramblingImag(i)*tr.OVSF2_1(i%2)*correctionFactorPath2(i);
path3E_DPDCH2[i]=path3DescramblingImag(i)*tr.OVSF2_1(i%2)*correctionFactorPath3(i);
path4E_DPDCH2[i]=path4DescramblingImag(i)*tr.OVSF2_1(i%2)*correctionFactorPath4(i);
path5E_DPDCH2[i]=path5DescramblingImag(i)*tr.OVSF2_1(i%2)*correctionFactorPath5(i);
path6E_DPDCH2[i]=path6DescramblingImag(i)*tr.OVSF2_1(i%2)*correctionFactorPath6(i);
//E_DPDCH3
path1E_DPDCH3[i]=path1DescramblingReal(i)*tr.OVSF4_1(i%4)*correctionFactorPath1(i);
path2E_DPDCH3[i]=path2DescramblingReal(i)*tr.OVSF4_1(i%4)*correctionFactorPath2(i);
path3E_DPDCH3[i]=path3DescramblingReal(i)*tr.OVSF4_1(i%4)*correctionFactorPath3(i);
path4E_DPDCH3[i]=path4DescramblingReal(i)*tr.OVSF4_1(i%4)*correctionFactorPath4(i);
path5E_DPDCH3[i]=path5DescramblingReal(i)*tr.OVSF4_1(i%4)*correctionFactorPath5(i);
path6E_DPDCH3[i]=path6DescramblingReal(i)*tr.OVSF4_1(i%4)*correctionFactorPath6(i);
//E_DPDCH3
path1E_DPDCH4[i]=path1DescramblingImag(i)*tr.OVSF4_1(i%4)*correctionFactorPath1(i);
path2E_DPDCH4[i]=path2DescramblingImag(i)*tr.OVSF4_1(i%4)*correctionFactorPath2(i);
path3E_DPDCH4[i]=path3DescramblingImag(i)*tr.OVSF4_1(i%4)*correctionFactorPath3(i);
path4E_DPDCH4[i]=path4DescramblingImag(i)*tr.OVSF4_1(i%4)*correctionFactorPath4(i);
path5E_DPDCH4[i]=path5DescramblingImag(i)*tr.OVSF4_1(i%4)*correctionFactorPath5(i);
path6E_DPDCH4[i]=path6DescramblingImag(i)*tr.OVSF4_1(i%4)*correctionFactorPath6(i);
}
vec sumHS_DPCCH,sumE_DPCCH,sumDPCCH,sumE_DPDCH1,sumE_DPDCH2,sumE_DPDCH3,sumE_DPDCH4;
sumDPCCH.set_length(numOfIteration*38400);
sumE_DPCCH.set_length(numOfIteration*38400);
sumHS_DPCCH.set_length(numOfIteration*38400);
sumE_DPDCH1.set_length(numOfIteration*38400);
sumE_DPDCH2.set_length(numOfIteration*38400);
sumE_DPDCH3.set_length(numOfIteration*38400);
sumE_DPDCH4.set_length(numOfIteration*38400);
for(int z=0;z<numOfIteration;z++)
{
sumHS_DPCCH[z]=path1HS_DPCCH(z)+path2HS_DPCCH(z)+path3HS_DPCCH(z)+path4HS_DPCCH(z)+path5HS_DPCCH(z)+path6HS_DPCCH(z);
sumDPCCH[z]=path1DPCCH(z)+path2DPCCH(z)+path3DPCCH(z)+path4DPCCH(z)+path5DPCCH(z)+path6DPCCH(z);
sumE_DPCCH[z]=path1E_DPCCH(z)+path2E_DPCCH(z)+path3E_DPCCH(z)+path4E_DPCCH(z)+path5E_DPCCH(z)+path6E_DPCCH(z);
sumE_DPDCH1[z]=path1E_DPDCH1(z)+path2E_DPDCH1(z)+path3E_DPDCH1(z)+path4E_DPDCH1(z)+path5E_DPDCH1(z)+path6E_DPDCH1(z);
sumE_DPDCH2[z]=path1E_DPDCH2(z)+path2E_DPDCH2(z)+path3E_DPDCH2(z)+path4E_DPDCH2(z)+path5E_DPDCH2(z)+path6E_DPDCH2(z);
sumE_DPDCH3[z]=path1E_DPDCH3(z)+path2E_DPDCH3(z)+path3E_DPDCH3(z)+path4E_DPDCH3(z)+path5E_DPDCH3(z)+path6E_DPDCH3(z);
sumE_DPDCH4[z]=path1E_DPDCH4(z)+path2E_DPDCH4(z)+path3E_DPDCH4(z)+path4E_DPDCH4(z)+path5E_DPDCH4(z)+path6E_DPDCH4(z);
}
vec HS_DPCCH,E_DPCCH,DPCCH,E_DPDCH1,E_DPDCH2,E_DPDCH3,E_DPDCH4;
bvec bHS_DPCCH,bE_DPCCH,bDPCCH,bE_DPDCH1,bE_DPDCH2,bE_DPDCH3,bE_DPDCH4;
E_DPCCH.set_length(150*numOfIteration);
DPCCH.set_length(150*numOfIteration);
HS_DPCCH.set_length(150*numOfIteration);
E_DPDCH1.set_length(19200*numOfIteration);
E_DPDCH2.set_length(19200*numOfIteration);
E_DPDCH3.set_length(9600*numOfIteration);
E_DPDCH4.set_length(9600*numOfIteration);
bE_DPCCH.set_length(150*numOfIteration);
bDPCCH.set_length(150*numOfIteration);
bHS_DPCCH.set_length(150*numOfIteration);
bE_DPDCH1.set_length(19200*numOfIteration);
bE_DPDCH2.set_length(19200*numOfIteration);
bE_DPDCH3.set_length(9600*numOfIteration);
bE_DPDCH4.set_length(9600*numOfIteration);
E_DPCCH.zeros();
DPCCH.zeros();
HS_DPCCH.zeros();
E_DPDCH1.zeros();
E_DPDCH2.zeros();
E_DPDCH3.zeros();
E_DPDCH4.zeros();
for(int k=0;k<150*numOfIteration;k++)
{
for(int w=0;w<256;w++)
{
E_DPCCH[k]=E_DPCCH[k]+sumE_DPCCH[w];
DPCCH[k]=DPCCH[k]+sumDPCCH[w];
HS_DPCCH[k]=HS_DPCCH[k]+sumHS_DPCCH[w];
}
(E_DPCCH[k]>0) ? bE_DPCCH[k]=1 : bE_DPCCH[k]=0;
(DPCCH[k]>0) ? bDPCCH[k]=1 : bDPCCH[k]=0;
(HS_DPCCH[k]>0) ? bHS_DPCCH[k]=1 : bHS_DPCCH[k]=0;
}
for(int k=0;k<19200*numOfIteration;k++)
{
for(int w=0;w<2;w++)
{
E_DPDCH1[k]=E_DPDCH1[k]+sumE_DPDCH1[w];
E_DPDCH2[k]=E_DPDCH2[k]+sumE_DPDCH2[w];
}
(E_DPDCH1[k]>0) ? bE_DPDCH1[k]=1 : bE_DPDCH1[k]=0;
(E_DPDCH2[k]>0) ? bE_DPDCH2[k]=1 : bE_DPDCH2[k]=0;
}
for(int k=0;k<9600*numOfIteration;k++)
{
for(int w=0;w<2;w++)
{
E_DPDCH3[k]=E_DPDCH3[k]+sumE_DPDCH3[w];
E_DPDCH4[k]=E_DPDCH4[k]+sumE_DPDCH4[w];
}
(E_DPDCH3[k]>0) ? bE_DPDCH3[k]=1 : bE_DPDCH3[k]=0;
(E_DPDCH4[k]>0) ? bE_DPDCH4[k]=1 : bE_DPDCH4[k]=0;
}
brDPCCH.count(tr.DPCCHall,bDPCCH);
brHS_DPCCH.count(tr.HS_DPCCHall,bHS_DPCCH);
brE_DPCCH.count(tr.E_DPCCHall,bE_DPCCH);
brE_DPDCH1.count(tr.E_DPDCH1all,bE_DPDCH1);
brE_DPDCH2.count(tr.E_DPDCH2all,bE_DPDCH2);
brE_DPDCH3.count(tr.E_DPDCH3all,bE_DPDCH3);
brE_DPDCH4.count(tr.E_DPDCH4all,bE_DPDCH4);
berDPCCH(i)=brDPCCH.get_errorrate();
berHS_DPCCH(i)=brHS_DPCCH.get_errorrate();
berE_DPCCH(i)=brE_DPCCH.get_errorrate();
berE_DPDCH1(i)=brE_DPDCH1.get_errorrate();
berE_DPDCH2(i)=brE_DPDCH2.get_errorrate();
berE_DPDCH3(i)=brE_DPDCH3.get_errorrate();
berE_DPDCH4(i)=brE_DPDCH4.get_errorrate();
}
//stats
out.open("BER.csv", ios_base::out | ios_base::trunc);
out<<"Eb/N0"<<';'<<"BER DPCCH"<<';'<<"BER HS_DPCCH"<<';'<<"BER E_DPCCH"<<';'<<"BER E_DPDCH1"<<';'
<<"BER E_DPDCH2"<<';'<<"BER E_DPDCH3"<<';'<<"BER E_DPDCH4"<<endl;
for(int i=0;i<EbN0dB.length();i++)
{
out<<EbN0dB(i)<<';'<<berDPCCH(i)<<';'<<berHS_DPCCH(i)<<';'<<berE_DPCCH(i)<<';'<<berE_DPDCH1(i)<<';'
<<berE_DPDCH2(i)<<';'<<berE_DPDCH3(i)<<';'<<berE_DPDCH4(i)<<endl;
}
out.close();
return 0;
}
CORASMA_BER_Test::CORASMA_BER_Test()
{
modem=new Modem_CORASMA();
int L=1;
int OF=1;
cmat fading;
cvec channel1,channel2,channel3,channel4,channel5,channel6,channel7,channel8,channel9,channel10,channel11,channel12,channel13,channel14,channel15,channel16;
bvec transmitted_bits;
bvec received_bits;
cvec sum_chips;
cvec transmitted_symbols;
cvec received_chips;
double norm_fading;
BERC berc,berc1,berc2;
AWGN_Channel channel;
vec EbN0dB = linspace(1000, 1000, 1);
vec EbN0 = pow(10, EbN0dB / 10);
double Eb = 1.0;
vec N0 = Eb * pow(EbN0, -1.0);
int NumOfBits = modem->nb_bits;
int MaxIterations = 10;
int MaxNrOfErrors = 200;
int MinNrOfErrors = 5;
vec ber;
ber.set_size(EbN0dB.size(), false);
ber.clear();
RNG_randomize();
for (int i=0;i<EbN0dB.length();i++){
cout << endl << "Simulating point nr " << i + 1 << endl;
berc.clear();
berc1.clear();
berc2.clear();
channel.set_noise(N0(i));
for (int j=0;j<MaxIterations;j++) {
transmitted_bits = randb(NumOfBits);
sum_chips=modem->modulate(transmitted_bits);
transmitted_symbols.set_length(sum_chips.length()+L+1);
transmitted_symbols.zeros();
fading.set_size(L,sum_chips.length());
fading.zeros();
channel1.set_length(sum_chips.length());
/* channel2.set_length(sum_chips.length());
channel3.set_length(sum_chips.length());
channel4.set_length(sum_chips.length());
channel5.set_length(sum_chips.length());
channel6.set_length(sum_chips.length());
channel7.set_length(sum_chips.length());
channel8.set_length(sum_chips.length());
channel9.set_length(sum_chips.length());
channel10.set_length(sum_chips.length());
channel11.set_length(sum_chips.length());
channel12.set_length(sum_chips.length());
channel13.set_length(sum_chips.length());
channel14.set_length(sum_chips.length());
channel15.set_length(sum_chips.length());
channel16.set_length(sum_chips.length());*/
for(int k=0;k<sum_chips.length()/OF;k++){
channel1.replace_mid(k*OF,ones_c(OF));
/* channel1.replace_mid(k*OF,randn_c()*ones(OF));
channel2.replace_mid(k*OF,randn_c()*ones(OF));
channel3.replace_mid(k*OF,randn_c()*ones(OF));
channel4.replace_mid(k*OF,randn_c()*ones(OF));
channel5.replace_mid(k*OF,randn_c()*ones(OF));
channel6.replace_mid(k*OF,randn_c()*ones(OF));
channel7.replace_mid(k*OF,randn_c()*ones(OF));
channel8.replace_mid(k*OF,randn_c()*ones(OF));
channel9.replace_mid(k*OF,randn_c()*ones(OF));
channel10.replace_mid(k*OF,randn_c()*ones(OF));
channel11.replace_mid(k*OF,randn_c()*ones(OF));
channel12.replace_mid(k*OF,randn_c()*ones(OF));
channel13.replace_mid(k*OF,randn_c()*ones(OF));
channel14.replace_mid(k*OF,randn_c()*ones(OF));
channel15.replace_mid(k*OF,randn_c()*ones(OF));
channel16.replace_mid(k*OF,randn_c()*ones(OF));*/
}
norm_fading=1./sqrt(inv_dB(0)*norm(channel1)*norm(channel1)/sum_chips.length()/*+inv_dB(0)*norm(channel2)*norm(channel2)/sum_chips.length()+inv_dB(0)*norm(channel3)*norm(channel3)/sum_chips.length()+inv_dB(0)*norm(channel4)*norm(channel4)/sum_chips.length()+inv_dB(0)*norm(channel5)*norm(channel5)/sum_chips.length()+inv_dB(0)*norm(channel6)*norm(channel6)/sum_chips.length()+inv_dB(0)*norm(channel7)*norm(channel7)/sum_chips.length()+inv_dB(0)*norm(channel8)*norm(channel8)/sum_chips.length()+inv_dB(0)*norm(channel9)*norm(channel9)/sum_chips.length()+inv_dB(0)*norm(channel10)*norm(channel10)/sum_chips.length()+inv_dB(0)*norm(channel11)*norm(channel11)/sum_chips.length()+inv_dB(0)*norm(channel12)*norm(channel12)/sum_chips.length()+inv_dB(0)*norm(channel13)*norm(channel13)/sum_chips.length()+inv_dB(0)*norm(channel14)*norm(channel14)/sum_chips.length()+inv_dB(0)*norm(channel15)*norm(channel15)/sum_chips.length()+inv_dB(0)*norm(channel16)*norm(channel16)/sum_chips.length()*/);
fading.set_row(0,norm_fading*channel1);
/* fading.set_row(1,norm_fading*channel2);
fading.set_row(2,norm_fading*channel3);
fading.set_row(3,norm_fading*channel4);
fading.set_row(4,norm_fading*channel5);
fading.set_row(5,norm_fading*channel6);
fading.set_row(6,norm_fading*channel7);
fading.set_row(7,norm_fading*channel8);
fading.set_row(8,norm_fading*channel9);
fading.set_row(9,norm_fading*channel10);
fading.set_row(10,norm_fading*channel11);
fading.set_row(11,norm_fading*channel12);
fading.set_row(12,norm_fading*channel13);
fading.set_row(13,norm_fading*channel14);
fading.set_row(14,norm_fading*channel15);
fading.set_row(15,norm_fading*channel16);*/
for (int k=0;k<L;k++){
transmitted_symbols+=concat(zeros_c(k),elem_mult(to_cvec(sum_chips),fading.get_row(k)),zeros_c(L+1-k));
}
received_chips = channel(/*transmitted_symbols*/sum_chips);
cvec constellation;
int time_offset_estimate;
received_bits=modem->demodulate(received_chips,constellation,time_offset_estimate);
bvec received_bits_inverted=received_bits+bin(1);
//Generic Transmitter + First Receiver M&M + Costas
berc1.count(transmitted_bits, received_bits);
ber(i) = berc1.get_errorrate();
berc=berc1;
berc2.count(transmitted_bits, received_bits_inverted);
if(berc2.get_errorrate()<ber(i)){
ber(i) = berc2.get_errorrate();
berc=berc2;
}
cout << " Iteration " << j + 1 << ": ber = " << berc.get_errorrate() << endl;
if (berc.get_errors() > MaxNrOfErrors) {
cout << "Breaking on point " << i + 1 << " with " << berc.get_errors() << " errors." << endl;
break;
}
}
if (berc.get_errors() < MinNrOfErrors) {
cout << "Exiting Simulation on point " << i + 1 << endl;
break;
}
}
//Print results:
cout << endl;
cout << "EbN0dB = " << EbN0dB << endl;
cout << "ber = " << ber << endl;
}
MCDAAOFDM_BER_Test::MCDAAOFDM_BER_Test()
{
modem=new Modem_MCDAAOFDM();
int L=1;
int quasi_static=modem->Nfft+modem->Ncp;
cmat fading;
cvec channel1,channel2,channel3,channel4,channel5,channel6,channel7,channel8,channel9,channel10,channel11,channel12,channel13,channel14,channel15,channel16;
bvec transmitted_bits;
bvec received_bits;
cvec modulated_ofdm;
cvec transmitted_symbols;
cvec received_ofdm;
double norm_fading;
BERC berc;
AWGN_Channel channel;
vec EbN0dB = linspace(0, 40, 41);
vec EbN0 = pow(10, EbN0dB / 10);
double Eb = 1.0;
vec N0 = Eb * pow(EbN0, -1.0);
int NumOfBits = 1000000;
int MaxIterations = 10;
int MaxNrOfErrors = 200;
int MinNrOfErrors = 5;
vec ber;
ber.set_size(EbN0dB.size(), false);
ber.clear();
RNG_randomize();
for (int i=0;i<EbN0dB.length();i++){
cout << endl << "Simulating point nr " << i + 1 << endl;
berc.clear();
channel.set_noise(N0(i));
for (int j=0;j<MaxIterations;j++) {
transmitted_bits = randb(NumOfBits);
modulated_ofdm=sqrt(modem->Nfft+modem->Ncp)/sqrt(modem->Nfft)*modem->modulate_mask_qpsk(transmitted_bits,0);
transmitted_symbols.set_length(modulated_ofdm.length()+L+1);
transmitted_symbols.zeros();
fading.set_size(L,modulated_ofdm.length());
fading.zeros();
channel1.set_length(modulated_ofdm.length());
/* channel2.set_length(modulated_ofdm.length());
channel3.set_length(modulated_ofdm.length());
channel4.set_length(modulated_ofdm.length());
channel5.set_length(modulated_ofdm.length());
channel6.set_length(modulated_ofdm.length());
channel7.set_length(modulated_ofdm.length());
channel8.set_length(modulated_ofdm.length());
channel9.set_length(modulated_ofdm.length());
channel10.set_length(modulated_ofdm.length());
channel11.set_length(modulated_ofdm.length());
channel12.set_length(modulated_ofdm.length());
channel13.set_length(modulated_ofdm.length());
channel14.set_length(modulated_ofdm.length());
channel15.set_length(modulated_ofdm.length());
channel16.set_length(modulated_ofdm.length());*/
for(int k=0;k<modulated_ofdm.length()/quasi_static;k++){
channel1.replace_mid(k*quasi_static,ones_c(quasi_static));
//complex<double> random_complex= randn_c();
//double canal=sqrt(real(random_complex*conj(random_complex)));
//channel1.replace_mid(k*quasi_static,canal*ones_c(quasi_static));
//channel1.replace_mid(k*quasi_static,randn_c()*ones(quasi_static));
/* channel2.replace_mid(k*quasi_static,randn_c()*ones(quasi_static));
channel3.replace_mid(k*quasi_static,randn_c()*ones(quasi_static));
channel4.replace_mid(k*quasi_static,randn_c()*ones(quasi_static));
channel5.replace_mid(k*quasi_static,randn_c()*ones(quasi_static));
channel6.replace_mid(k*quasi_static,randn_c()*ones(quasi_static));
channel7.replace_mid(k*quasi_static,randn_c()*ones(quasi_static));
channel8.replace_mid(k*quasi_static,randn_c()*ones(quasi_static));
channel9.replace_mid(k*quasi_static,randn_c()*ones(quasi_static));
channel10.replace_mid(k*quasi_static,randn_c()*ones(quasi_static));
channel11.replace_mid(k*quasi_static,randn_c()*ones(quasi_static));
channel12.replace_mid(k*quasi_static,randn_c()*ones(quasi_static));
channel13.replace_mid(k*quasi_static,randn_c()*ones(quasi_static));
channel14.replace_mid(k*quasi_static,randn_c()*ones(quasi_static));
channel15.replace_mid(k*quasi_static,randn_c()*ones(quasi_static));
channel16.replace_mid(k*quasi_static,randn_c()*ones(quasi_static));*/
}
norm_fading=1./sqrt(inv_dB(0)*norm(channel1)*norm(channel1)/modulated_ofdm.length()/*+inv_dB(0)*norm(channel2)*norm(channel2)/modulated_ofdm.length()+inv_dB(0)*norm(channel3)*norm(channel3)/modulated_ofdm.length()+inv_dB(0)*norm(channel4)*norm(channel4)/modulated_ofdm.length()+inv_dB(0)*norm(channel5)*norm(channel5)/modulated_ofdm.length()+inv_dB(0)*norm(channel6)*norm(channel6)/modulated_ofdm.length()+inv_dB(0)*norm(channel7)*norm(channel7)/modulated_ofdm.length()+inv_dB(0)*norm(channel8)*norm(channel8)/modulated_ofdm.length()+inv_dB(0)*norm(channel9)*norm(channel9)/modulated_ofdm.length()+inv_dB(0)*norm(channel10)*norm(channel10)/modulated_ofdm.length()+inv_dB(0)*norm(channel11)*norm(channel11)/modulated_ofdm.length()+inv_dB(0)*norm(channel12)*norm(channel12)/modulated_ofdm.length()+inv_dB(0)*norm(channel13)*norm(channel13)/modulated_ofdm.length()+inv_dB(0)*norm(channel14)*norm(channel14)/modulated_ofdm.length()+inv_dB(0)*norm(channel15)*norm(channel15)/modulated_ofdm.length()+inv_dB(0)*norm(channel16)*norm(channel16)/modulated_ofdm.length()*/);
fading.set_row(0,norm_fading*channel1);
/* fading.set_row(1,norm_fading*channel2);
fading.set_row(2,norm_fading*channel3);
fading.set_row(3,norm_fading*channel4);
fading.set_row(4,norm_fading*channel5);
fading.set_row(5,norm_fading*channel6);
fading.set_row(6,norm_fading*channel7);
fading.set_row(7,norm_fading*channel8);
fading.set_row(8,norm_fading*channel9);
fading.set_row(9,norm_fading*channel10);
fading.set_row(10,norm_fading*channel11);
fading.set_row(11,norm_fading*channel12);
fading.set_row(12,norm_fading*channel13);
fading.set_row(13,norm_fading*channel14);
fading.set_row(14,norm_fading*channel15);
fading.set_row(15,norm_fading*channel16);*/
for (int k=0;k<L;k++){
transmitted_symbols+=concat(zeros_c(k),elem_mult(to_cvec(modulated_ofdm),fading.get_row(k)),zeros_c(L+1-k));
}
received_ofdm = channel(transmitted_symbols);
//received_chips = sum_chips;
cvec constellation;
vec estimated_channel;
double metric;
//bool is_ofdm=modem->detection(received_ofdm,metric);
modem->time_offset_estimate=0;
modem->frequency_offset_estimate=0;
cvec demodulated_ofdm_symbols=modem->equalizer_fourth_power(received_ofdm,0,estimated_channel);
received_bits=modem->demodulate_mask_gray_qpsk(demodulated_ofdm_symbols,0,constellation);
berc.count(transmitted_bits, received_bits);
ber(i) = berc.get_errorrate();
cout << " Iteration " << j + 1 << ": ber = " << berc.get_errorrate() << endl;
if (berc.get_errors() > MaxNrOfErrors) {
cout << "Breaking on point " << i + 1 << " with " << berc.get_errors() << " errors." << endl;
break;
}
}
if (berc.get_errors() < MinNrOfErrors) {
cout << "Exiting Simulation on point " << i + 1 << endl;
break;
}
}
//Print results:
cout << endl;
cout << "EbN0dB = " << EbN0dB << endl;
cout << "ber = " << ber << endl;
}
int main(void)
{
//general parameters
double threshold_value = 50;
string map_metric = "maxlogMAP";
ivec gen = "07 05";//octal notation
int constraint_length = 3;
int ch_nb_taps = 4;//number of channel multipaths
int nb_errors_lim = 3000;
int nb_bits_lim = int(1e6);
int perm_len = pow2i(14);//permutation length
int nb_iter = 10;//number of iterations in the turbo decoder
vec EbN0_dB = "0:0.5:10";
double R = 1.0 / 2.0;//coding rate of FEC
double Ec = 1.0;//coded bit energy
#ifdef USE_PRECODER
ivec prec_gen = "03 02";//octal notation
int prec_gen_length = 2;
#endif
//other parameters
int nb_bits_tail = perm_len / gen.length();
int nb_bits = nb_bits_tail - (constraint_length - 1);//number of bits in a block (without tail)
vec sigma2 = (0.5 * Ec / R) * pow(inv_dB(EbN0_dB), -1.0);//N0/2
int nb_blocks;//number of blocks
int nb_errors;
bvec bits(nb_bits);//data bits
bvec nsc_coded_bits(perm_len);//tail is added
bvec em_bits(perm_len);
bmat parity_bits;
ivec perm(perm_len);
ivec inv_perm(perm_len);
vec rec(perm_len);
//SISO equalizer
vec eq_apriori_data(perm_len);
vec eq_extrinsic_data;
//SISO NSC
vec nsc_intrinsic_coded(perm_len);
vec nsc_apriori_data(nb_bits_tail);
nsc_apriori_data.zeros();//always zero
vec nsc_extrinsic_coded;
vec nsc_extrinsic_data;
//decision
bvec rec_bits(nb_bits_tail);
int snr_len = EbN0_dB.length();
mat ber(nb_iter, snr_len);
ber.zeros();
register int en, n;
//CCs
Convolutional_Code nsc;
nsc.set_generator_polynomials(gen, constraint_length);
#ifdef USE_PRECODER
Rec_Syst_Conv_Code prec;
prec.set_generator_polynomials(prec_gen, prec_gen_length);
#endif
//BPSK
BPSK bpsk;
//AWGN
AWGN_Channel awgn;
//multipath channel impulse response (Rayleigh fading) with real coefficients
vec ch_imp_response(ch_nb_taps);
vec ini_state = ones(ch_nb_taps);//initial state is zero
MA_Filter<double, double, double> multipath_channel;
//SISO blocks
SISO siso;
siso.set_generators(gen, constraint_length);
siso.set_map_metric(map_metric);
#ifdef USE_PRECODER
siso.set_precoder_generator(prec_gen(0), prec_gen_length);
#endif
//BER
BERC berc;
//Randomize generators
RNG_randomize();
//main loop
for (en = 0;en < snr_len;en++) {
cout << "EbN0_dB = " << EbN0_dB(en) << endl;
awgn.set_noise(sigma2(en));
siso.set_noise(sigma2(en));
nb_errors = 0;
nb_blocks = 0;
while ((nb_errors < nb_errors_lim) && (nb_blocks*nb_bits < nb_bits_lim))//if at the last iteration the nb. of errors is inferior to lim, then process another block
{
//permutation
perm = sort_index(randu(perm_len));
//inverse permutation
inv_perm = sort_index(perm);
//bits generation
bits = randb(nb_bits);
//convolutional code
nsc.encode_tail(bits, nsc_coded_bits);//tail is added here to information bits to close the trellis
//permutation
em_bits = nsc_coded_bits(perm);
#ifdef USE_PRECODER
//precoder
prec.encode(em_bits, parity_bits);
em_bits = parity_bits.get_col(0);
#endif
//BPSK modulation (1->-1,0->+1) + multipath channel
ch_imp_response = randray(ch_nb_taps);
ch_imp_response /= sqrt(sum_sqr(ch_imp_response));//normalized power profile
multipath_channel.set_coeffs(ch_imp_response);
multipath_channel.set_state(ini_state);//inital state is zero
rec = awgn(multipath_channel(bpsk.modulate_bits(em_bits)));
//turbo equalizer
eq_apriori_data.zeros();//a priori information of emitted symbols
siso.set_impulse_response(ch_imp_response);
for (n = 0;n < nb_iter;n++)
{
//first decoder
siso.equalizer(eq_extrinsic_data, rec, eq_apriori_data, false);//no tail
//deinterleave+threshold
nsc_intrinsic_coded = SISO::threshold(eq_extrinsic_data(inv_perm), threshold_value);
//second decoder
siso.nsc(nsc_extrinsic_coded, nsc_extrinsic_data, nsc_intrinsic_coded, nsc_apriori_data, true);//tail
//decision
rec_bits = bpsk.demodulate_bits(-nsc_extrinsic_data);//assume that a priori info is zero
//count errors
berc.clear();
berc.count(bits, rec_bits.left(nb_bits));
ber(n, en) += berc.get_errorrate();
//interleave
eq_apriori_data = nsc_extrinsic_coded(perm);
}//end iterations
nb_errors += int(berc.get_errors());//get number of errors at the last iteration
nb_blocks++;
}//end blocks (while loop)
//compute BER over all tx blocks
ber.set_col(en, ber.get_col(en) / nb_blocks);
}
//save results to file
it_file ff("turbo_equalizer_bersim_multipath.it");
ff << Name("BER") << ber;
ff << Name("EbN0_dB") << EbN0_dB;
ff.close();
return 0;
}
TEST(SISO, all)
{
//general parameters
string map_metric="maxlogMAP";
ivec gen = "07 05";//octal form, feedback first
int constraint_length = 3;
int nb_errors_lim = 300;
int nb_bits_lim = int(1e4);
int perm_len = (1<<14);//total number of bits in a block (with tail)
int nb_iter = 10;//number of iterations in the turbo decoder
vec EbN0_dB = "0.0 0.5 1.0 1.5 2.0";
double R = 1.0/3.0;//coding rate (non punctured PCCC)
double Ec = 1.0;//coded bit energy
//other parameters
int nb_bits = perm_len-(constraint_length-1);//number of bits in a block (without tail)
vec sigma2 = (0.5*Ec/R)*pow(inv_dB(EbN0_dB), -1.0);//N0/2
double Lc;//scaling factor
int nb_blocks;//number of blocks
int nb_errors;
ivec perm(perm_len);
ivec inv_perm(perm_len);
bvec bits(nb_bits);
int cod_bits_len = perm_len*gen.length();
bmat cod1_bits;//tail is added
bvec tail;
bvec cod2_input;
bmat cod2_bits;
int rec_len = int(1.0/R)*perm_len;
bvec coded_bits(rec_len);
vec rec(rec_len);
vec dec1_intrinsic_coded(cod_bits_len);
vec dec2_intrinsic_coded(cod_bits_len);
vec apriori_data(perm_len);//a priori LLR for information bits
vec extrinsic_coded(perm_len);
vec extrinsic_data(perm_len);
bvec rec_bits(perm_len);
int snr_len = EbN0_dB.length();
mat ber(nb_iter,snr_len);
ber.zeros();
register int en,n;
//Recursive Systematic Convolutional Code
Rec_Syst_Conv_Code cc;
cc.set_generator_polynomials(gen, constraint_length);//initial state should be the zero state
//BPSK modulator
BPSK bpsk;
//AWGN channel
AWGN_Channel channel;
//SISO modules
SISO siso;
siso.set_generators(gen, constraint_length);
siso.set_map_metric(map_metric);
//BER
BERC berc;
//Fix random generators
RNG_reset(12345);
//main loop
for (en=0;en<snr_len;en++)
{
channel.set_noise(sigma2(en));
Lc = -2/sigma2(en);//normalisation factor for intrinsic information (take into account the BPSK mapping)
nb_errors = 0;
nb_blocks = 0;
while ((nb_errors<nb_errors_lim) && (nb_blocks*nb_bits<nb_bits_lim))//if at the last iteration the nb. of errors is inferior to lim, then process another block
{
//permutation
perm = sort_index(randu(perm_len));
//inverse permutation
inv_perm = sort_index(perm);
//bits generation
bits = randb(nb_bits);
//parallel concatenated convolutional code
cc.encode_tail(bits, tail, cod1_bits);//tail is added here to information bits to close the trellis
cod2_input = concat(bits, tail);
cc.encode(cod2_input(perm), cod2_bits);
for (n=0;n<perm_len;n++)//output with no puncturing
{
coded_bits(3*n) = cod2_input(n);//systematic output
coded_bits(3*n+1) = cod1_bits(n,0);//first parity output
coded_bits(3*n+2) = cod2_bits(n,0);//second parity output
}
//BPSK modulation (1->-1,0->+1) + AWGN channel
rec = channel(bpsk.modulate_bits(coded_bits));
//form input for SISO blocks
for (n=0;n<perm_len;n++)
{
dec1_intrinsic_coded(2*n) = Lc*rec(3*n);
dec1_intrinsic_coded(2*n+1) = Lc*rec(3*n+1);
dec2_intrinsic_coded(2*n) = 0.0;//systematic output of the CC is already used in decoder1
dec2_intrinsic_coded(2*n+1) = Lc*rec(3*n+2);
}
//turbo decoder
apriori_data.zeros();//a priori LLR for information bits
for (n=0;n<nb_iter;n++)
{
//first decoder
siso.rsc(extrinsic_coded, extrinsic_data, dec1_intrinsic_coded, apriori_data, true);
//interleave
apriori_data = extrinsic_data(perm);
//second decoder
siso.rsc(extrinsic_coded, extrinsic_data, dec2_intrinsic_coded, apriori_data, false);
//decision
apriori_data += extrinsic_data;//a posteriori information
rec_bits = bpsk.demodulate_bits(-apriori_data(inv_perm));//take into account the BPSK mapping
//count errors
berc.clear();
berc.count(bits, rec_bits.left(nb_bits));
ber(n,en) += berc.get_errorrate();
//deinterleave for the next iteration
apriori_data = extrinsic_data(inv_perm);
}//end iterations
nb_errors += int(berc.get_errors());//get number of errors at the last iteration
nb_blocks++;
}//end blocks (while loop)
//compute BER over all tx blocks
ber.set_col(en, ber.get_col(en)/nb_blocks);
}
// Results for max log MAP algorithm
vec ref = "0.158039 0.110731 0.0770358 0.0445611 0.0235014";
assert_vec(ref, ber.get_row(0));
ref = "0.14168 0.0783177 0.0273471 0.00494445 0.00128189";
assert_vec(ref, ber.get_row(1));
ref = "0.141375 0.0565865 0.00817971 0.000305213 0";
assert_vec(ref, ber.get_row(2));
ref = "0.142412 0.0421194 0.000732511 0 0";
assert_vec(ref, ber.get_row(3));
ref = "0.144244 0.0282017 0.000183128 0 0";
assert_vec(ref, ber.get_row(4));
ref = "0.145587 0.0142229 0 0 0";
assert_vec(ref, ber.get_row(5));
ref = "0.148517 0.00714199 0 0 0";
assert_vec(ref, ber.get_row(6));
ref = "0.141619 0.00225858 0 0 0";
assert_vec(ref, ber.get_row(7));
ref = "0.149676 0.000549383 0 0 0";
assert_vec(ref, ber.get_row(8));
ref = "0.14461 0 0 0 0";
assert_vec(ref, ber.get_row(9));
}
int main(void)
{
//general parameters
string mud_method = "maxlogTMAP";
int nb_usr = 2;
int spreading_factor = 16;
#ifdef USE_CC
string map_metric="maxlogMAP";
ivec gen = "037 021";
int constraint_length = 5;
spreading_factor = 8;
#endif
double threshold_value = 50;
int ch_nb_taps = 4;//number of channel multipaths
int nb_errors_lim = 1500;
int nb_bits_lim = int(1e3);//int(1e6);
int perm_len = 1024;//38400;//permutation length
int nb_iter = 15;//number of iterations in the turbo decoder
vec EbN0_dB = "10";//"0:10:20";
double Ec = 1.0;//chip energy
#ifdef USE_CC
int inv_R = spreading_factor*gen.length();
#else
int inv_R = spreading_factor;
#endif
double R = 1.0/double(inv_R);//coding rate
//other parameters
string filename = "IDMA_"+mud_method+"_"+to_str(nb_usr)+".it";
#ifdef USE_CC
filename = "cc"+filename;
#endif
filename = "Res/"+filename;
int nb_bits = perm_len/inv_R;//number of bits in a block
vec sigma2 = (0.5*Ec/R)*pow(inv_dB(EbN0_dB), -1.0);//N0/2
int nb_blocks = 0;//number of blocks
int nb_errors = 0;//number of errors
bmat bits(nb_usr,nb_bits);//data bits
#ifdef USE_CC
bvec coded_bits(nb_bits*gen.length());
vec mod_bits(nb_bits*gen.length());
#else
vec mod_bits(nb_bits);
#endif
vec chips(perm_len);
imat perm(nb_usr,perm_len);
imat inv_perm(nb_usr,perm_len);
vec em(perm_len);
vec rec(perm_len+ch_nb_taps-1);//padding zeros are added
//SISO MUD
mat mud_apriori_data(nb_usr,perm_len);
mat mud_extrinsic_data;
//SISO decoder (scrambler or CC)
vec dec_intrinsic_coded(perm_len);
vec dec_apriori_data(nb_bits);
dec_apriori_data.zeros();//always zero
vec dec_extrinsic_coded;
vec dec_extrinsic_data;
//decision
bvec rec_bits(nb_bits);
int snr_len = EbN0_dB.length();
mat ber(nb_iter,snr_len);
ber.zeros();
register int en,n,u;
#ifdef USE_CC
//CC
Convolutional_Code nsc;
nsc.set_generator_polynomials(gen, constraint_length);
#endif
//BPSK
BPSK bpsk;
//scrambler pattern
vec pattern = kron(ones(spreading_factor/2), vec("1.0 -1.0"));
//AWGN
AWGN_Channel awgn;
//multipath channel impulse response (Rayleigh fading) with real coefficients
vec single_ch(ch_nb_taps);
mat ch_imp_response(nb_usr, ch_nb_taps);
vec ini_state = zeros(ch_nb_taps);
MA_Filter<double,double,double> multipath_channel(ini_state);
multipath_channel.set_state(ini_state);//initial state is always 0 due to Zero Padding technique
vec padding_zeros = zeros(ch_nb_taps-1);
//SISO blocks
SISO siso;
siso.set_scrambler_pattern(pattern);
siso.set_mud_method(mud_method);
#ifdef USE_CC
siso.set_generators(gen, constraint_length);
siso.set_map_metric(map_metric);
siso.set_tail(false);
#endif
//BER
BERC berc;
//progress timer
tr::Progress_Timer timer;
timer.set_max(snr_len);
//Randomize generators
RNG_randomize();
//main loop
timer.progress(0.0);
for (en=0; en<snr_len; en++)
{
awgn.set_noise(sigma2(en));
siso.set_noise(sigma2(en));
nb_errors = 0;
nb_blocks = 0;
while ((nb_errors<nb_errors_lim) && (nb_blocks*nb_bits<nb_bits_lim))//if at the last iteration the nb. of errors is inferior to lim, then process another block
{
rec.zeros();
for (u=0; u<nb_usr; u++)
{
//permutation
perm.set_row(u, sort_index(randu(perm_len)));
//inverse permutation
inv_perm.set_row(u, sort_index(perm.get_row(u)));
//bits generation
bits.set_row(u, randb(nb_bits));
#ifdef USE_CC
//convolutional code
nsc.encode(bits.get_row(u), coded_bits);//no tail
//BPSK modulation (1->-1,0->+1)
mod_bits = bpsk.modulate_bits(coded_bits);
#else
//BPSK modulation (1->-1,0->+1)
mod_bits = bpsk.modulate_bits(bits.get_row(u));
#endif
//scrambler
chips = kron(mod_bits, pattern);
//permutation
em = chips(perm.get_row(u));
//multipath channel
single_ch = randray(ch_nb_taps);
single_ch /= sqrt(sum_sqr(single_ch));//normalized power profile
ch_imp_response.set_row(u, single_ch);
multipath_channel.set_coeffs(ch_imp_response.get_row(u));
rec += multipath_channel(concat(em, padding_zeros));//Zero Padding
}
rec = awgn(rec);
//turbo MUD
mud_apriori_data.zeros();//a priori LLR of emitted symbols
siso.set_impulse_response(ch_imp_response);
for (n=0; n<nb_iter; n++)
{
//MUD
siso.mud(mud_extrinsic_data, rec, mud_apriori_data);
berc.clear();//mean error rate over all users
for (u=0; u<nb_usr; u++)
{
//deinterleave
dec_intrinsic_coded = mud_extrinsic_data.get_row(u)(inv_perm.get_row(u));
#ifdef USE_CC
//decoder+descrambler
siso.nsc(dec_extrinsic_coded, dec_extrinsic_data, dec_intrinsic_coded, dec_apriori_data);
#else
//descrambler
siso.descrambler(dec_extrinsic_coded, dec_extrinsic_data, dec_intrinsic_coded, dec_apriori_data);
#endif
//decision
rec_bits = bpsk.demodulate_bits(-dec_extrinsic_data);//suppose that a priori info is zero
//count errors
berc.count(bits.get_row(u), rec_bits);
//interleave+threshold
mud_apriori_data.set_row(u, threshold(dec_extrinsic_coded(perm.get_row(u)), threshold_value));
}
ber(n,en) += berc.get_errorrate();
}//end iterations
nb_errors += int(berc.get_errors());//get number of errors at the last iteration
nb_blocks++;
}//end blocks (while loop)
//compute BER over all tx blocks
ber.set_col(en, ber.get_col(en)/nb_blocks);
//show progress
timer.progress(1+en);
}
timer.toc_print();
//save results to file
#ifdef TO_FILE
it_file ff(filename);
ff << Name("BER") << ber;
ff << Name("EbN0_dB") << EbN0_dB;
ff << Name("nb_usr") << nb_usr;
ff << Name("gen") << spreading_factor;
ff << Name("nb_iter") << nb_iter;
ff << Name("total_nb_bits") << nb_bits;
ff << Name("nb_errors_lim") << nb_errors_lim;
ff << Name("nb_bits_lim") << nb_bits_lim;
#ifdef USE_CC
ff << Name("gen") << gen;
#endif
ff.close();
#else
//show BER
cout << ber << endl;
#endif
return 0;
}
