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time_compare.c
308 lines (284 loc) · 10.1 KB
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time_compare.c
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#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/time.h>
#include <gsl/gsl_fit.h>
#define MAX_CARDS 20
#define MAX_FREQS 1500
#define MAX_PHASES 8192
int verbose=1;
char radar_name1[80]="kansas_tx";
char radar_name2[80]="kansas_tx_repair";
int CARD=0;
FILE *calfile1=NULL;
FILE *calfile2=NULL;
FILE *summaryfile=NULL;
struct timeval t0,t1,t2,t3;
unsigned long elapsed;
double expected_timedelays[13]={0.25,0.45,0.8,1.5,2.75,5.0,8.0,15.0,25.0,45.0,80.0,140.0,250.0};
double pwr_threshold=-20.0;
double expected_timedelay(int delaycode) {
int bit,i,code;
double timedelay=0;
code=delaycode;
for (i=0;i<13;i++) {
bit=(code & 0x1);
timedelay+=bit*expected_timedelays[i];
code=code >> 1;
}
return timedelay;
}
double phase_to_timedelay(double phase,double freq)
{
/*
* phase in degrees freq in Hz timedelay in ns ratio (0-1)
*/
double timedelay=0;
timedelay=phase/360.0/freq*1E9; // nanoseconds
return -timedelay;
}
int main()
{
int num_phasecodes[MAX_CARDS],num_cards[MAX_CARDS],num_freqs[MAX_CARDS],active[MAX_CARDS];
int i,b,c,ii,cc,count,summary_freqs;
int f,d,p,o;
double offset,slope,slope_variance,sumsq;
double best_sumsq[MAX_PHASES],best_offset[MAX_PHASES],best_slope[MAX_PHASES],best_var[MAX_PHASES];
char tmp;
int lowest_pwr_mag_index[3]={-1,-1,-1}; // freq,card,phasecode
double lowest_pwr_mag=1E10; // freq,card,phasecode
int highest_time_delay_card[MAX_FREQS]; // freq
double highest_time_delay[MAX_FREQS];
double *freq[MAX_CARDS],*phase[MAX_FREQS][MAX_CARDS];
double *pwr_mag[MAX_FREQS][MAX_CARDS];
double *timedelay1[MAX_FREQS][MAX_CARDS];
double *timedelay2[MAX_FREQS][MAX_CARDS];
double minimum_timedelay=0;
double Y[MAX_FREQS],time0[MAX_FREQS];
char filename1[120];
char filename2[120];
double max_Y;
double diff,var,max_var[13],max_var0;
int hmm;
for(i=0;i<MAX_FREQS;i++) {
highest_time_delay_card[i]=-1;
highest_time_delay[i]=-1000;
}
printf("Nulling arrays\n");
for(c=0;c<MAX_CARDS;c++) {
active[c]=0;
freq[c]=NULL;
num_freqs[c]=0;
for(i=0;i<MAX_FREQS;i++) {
phase[i][c]=NULL;
pwr_mag[i][c]=NULL;
timedelay1[i][c]=NULL;
timedelay2[i][c]=NULL;
}
}
for(c=CARD;c<=CARD;c++) {
sprintf(filename1,"/tmp/phasing_cal_%s_%d.dat",radar_name1,c);
calfile1=fopen(filename1,"r");
printf("1: %p %s\n",calfile1,filename1);
if (calfile1!=NULL ) {
fread(&num_phasecodes[c],sizeof(int),1,calfile1);
fread(&num_cards[c],sizeof(int),1,calfile1);
fread(&num_freqs[c],sizeof(int),1,calfile1);
if (num_freqs[c]>MAX_FREQS) {
printf("Too many stored frequencies...up the MAX_FREQS define!\n");
exit(0);
}
printf("Allocating arrays\n");
for(i=0;i<num_freqs[c];i++) {
if (freq[c]!=NULL) free(freq[c]);
freq[c]=calloc(num_freqs[c],sizeof(double));
if (phase[i][c]!=NULL) free(phase[i][c]);
phase[i][c]=calloc(num_phasecodes[c],sizeof(double));
if (pwr_mag[i][c]!=NULL) free(pwr_mag[i][c]);
pwr_mag[i][c]=calloc(num_phasecodes[c],sizeof(double));
if (timedelay1[i][c]!=NULL) free(timedelay1[i][c]);
timedelay1[i][c]=calloc(num_phasecodes[c],sizeof(double));
}
printf("Reading frequency array\n");
count=fread(freq[c],sizeof(double),num_freqs[c],calfile1);
count=1;
printf("Reading in data\n");
while(count>0) {
count=fread(&ii,sizeof(int),1,calfile1);
if (count==0) {
break;
}
count=fread(phase[ii][c],sizeof(double),num_phasecodes[c],calfile1);
if (verbose > 1) printf("Freq index: %d Phase Count: %d\n",ii,count);
count=fread(pwr_mag[ii][c],sizeof(double),num_phasecodes[c],calfile1);
if (verbose > 1) printf("Freq index: %d Pwr-mag Count: %d\n",ii,count);
if (count==0) {
break;
}
}
if (count==0) {
if (feof(calfile1)) printf("End of File!\n");
}
fclose(calfile1);
printf("Processing Phase Information for Radar: %s Card: %d\n",radar_name1,c);
for (p=0;p<num_phasecodes[c];p++) {
// printf("Phase Code: %d\n",p);
best_offset[p]=1000;
best_sumsq[p]=1E100;
for (o=-20;o<20;o++) {
offset=360.0*o;
max_Y=-1000;
for (i=0;i<num_freqs[c];i++) {
Y[i]=phase[i][c][p]+offset;
if (Y[i]> max_Y) max_Y=Y[i];
}
/*
* Linear Regression Y=slope*freq
*/
gsl_fit_mul (freq[c], 1, Y, 1, num_freqs[c], &slope, &slope_variance, &sumsq);
if (max_Y < 0 ) {
if (sumsq < best_sumsq[p]) {
best_offset[p]=offset;
best_sumsq[p]=sumsq;
best_var[p]=slope_variance;
best_slope[p]=slope;
}
}
} // end offset loop
printf("%d :: Best Offset: %lf Phase0: %lf\n",p,best_offset[p],phase[0][c][p]);
/*
* Build the timedelays arrays using the best phase offset from the linear regression
*/
for (i=0;i<num_freqs[c];i++) {
time0[i]=phase_to_timedelay(phase[i][c][0]+best_offset[0],freq[c][i]);
timedelay1[i][c][p]=phase_to_timedelay(phase[i][c][p]+best_offset[p],freq[c][i]);
if((phase[i][c][p]+best_offset[p]) > 0 ) {
printf("ERROR: Phase error: %d %d %d %lfi %lf\n",i,c,p,phase[i][c][p],best_offset[p]);
exit(0);
}
// printf("Phase: %d :: Freq %e :: Time Delay %% Diff %lf\n",
// p,freq[c][i],fabs((timedelay[i][c][p]-expected_timedelay(p)-time0[i])/(expected_timedelay(p)+time0[i]))*100);
} //freq loop
if(timedelay1[0][c][p] < minimum_timedelay) {
printf("ERROR: Timedelay1 switch error: %d %lf\n",p,timedelay1[0][c][p]);
exit(0);
}
if(pwr_mag[0][c][p] < pwr_threshold) {
printf("ERROR: pwr_mag switch error: %d\n",p);
exit(0);
}
} //phasecode loop
} // end calfile1 check
sprintf(filename2,"/tmp/phasing_cal_%s_%d.dat",radar_name2,c);
calfile2=fopen(filename2,"r");
printf("1: %p %s\n",calfile2,filename2);
if (calfile2!=NULL ) {
fread(&num_phasecodes[c],sizeof(int),1,calfile2);
fread(&num_cards[c],sizeof(int),1,calfile2);
fread(&num_freqs[c],sizeof(int),1,calfile2);
if (num_freqs[c]>MAX_FREQS) {
printf("Too many stored frequencies...up the MAX_FREQS define!\n");
exit(0);
}
printf("Allocating arrays\n");
for(i=0;i<num_freqs[c];i++) {
if (freq[c]!=NULL) free(freq[c]);
freq[c]=calloc(num_freqs[c],sizeof(double));
if (phase[i][c]!=NULL) free(phase[i][c]);
phase[i][c]=calloc(num_phasecodes[c],sizeof(double));
if (pwr_mag[i][c]!=NULL) free(pwr_mag[i][c]);
pwr_mag[i][c]=calloc(num_phasecodes[c],sizeof(double));
if (timedelay2[i][c]!=NULL) free(timedelay2[i][c]);
timedelay2[i][c]=calloc(num_phasecodes[c],sizeof(double));
}
printf("Reading frequency array\n");
count=fread(freq[c],sizeof(double),num_freqs[c],calfile2);
count=1;
printf("Reading in data\n");
while(count>0) {
count=fread(&ii,sizeof(int),1,calfile2);
if (count==0) {
break;
}
count=fread(phase[ii][c],sizeof(double),num_phasecodes[c],calfile2);
if (verbose > 1) printf("Freq index: %d Phase Count: %d\n",ii,count);
count=fread(pwr_mag[ii][c],sizeof(double),num_phasecodes[c],calfile2);
if (verbose > 1) printf("Freq index: %d Pwr-mag Count: %d\n",ii,count);
if (count==0) {
break;
}
}
if (count==0) {
if (feof(calfile2)) printf("End of File!\n");
}
fclose(calfile2);
printf("Processing Phase Information for Radar: %s Card: %d\n",radar_name2,c);
for (p=0;p<num_phasecodes[c];p++) {
// printf("Phase Code: %d\n",p);
best_offset[p]=1000;
best_sumsq[p]=1E100;
for (o=-20;o<20;o++) {
offset=360.0*o;
max_Y=-1000;
for (i=0;i<num_freqs[c];i++) {
Y[i]=phase[i][c][p]+offset;
if (Y[i]> max_Y) max_Y=Y[i];
}
/*
* Linear Regression Y=slope*freq
*/
gsl_fit_mul (freq[c], 1, Y, 1, num_freqs[c], &slope, &slope_variance, &sumsq);
if (max_Y < 0 ) {
if (sumsq < best_sumsq[p]) {
best_offset[p]=offset;
best_sumsq[p]=sumsq;
best_var[p]=slope_variance;
best_slope[p]=slope;
}
}
} // end offset loop
printf("%d :: Best Offset: %lf Phase0: %lf\n",p,best_offset[p],phase[0][c][p]);
/*
* Build the timedelays arrays using the best phase offset from the linear regression
*/
for (i=0;i<num_freqs[c];i++) {
time0[i]=phase_to_timedelay(phase[i][c][0]+best_offset[0],freq[c][i]);
timedelay2[i][c][p]=phase_to_timedelay(phase[i][c][p]+best_offset[p],freq[c][i]);
// printf("Phase: %d :: Freq %e :: Time Delay %% Diff %lf\n",
// p,freq[c][i],fabs((timedelay[i][c][p]-expected_timedelay(p)-time0[i])/(expected_timedelay(p)+time0[i]))*100);
} //freq loop
if(timedelay2[0][c][p] < minimum_timedelay) {
printf("ERROR: Timedelay2 switch error: %d %lf\n",p,timedelay2[0][c][p]);
exit(0);
}
if(pwr_mag[0][c][p] < pwr_threshold) {
printf("ERROR: pwr_mag switch error: %d\n",p);
exit(0);
}
} //phasecode loop
} // end calfile2 check
max_var0=-1000;
for (b=0;b<13;b++) {
max_var[b]=-1000.0;
}
for (p=0;p<num_phasecodes[c];p++) {
for (i=0;i<num_freqs[c];i++) {
diff=timedelay1[i][c][p]-timedelay2[i][c][p];
var=fabs(diff);
if (p == 0 ) {
if (var > max_var0) max_var0=var;
}
for (b=0;b<13;b++) {
hmm=pow(2,b);
if( p == hmm ) {
if (var > max_var[b]) max_var[b]=var;
}
}
}
}
printf("Code: %d Max Diff (ns): %lf\n",0,max_var0);
for (b=0;b<13;b++) {
printf("Code: %d Max Diff (ns): %lf\n",(int)pow(2,b),max_var[b]);
}
} // End card Loop
} // end of main