// reset frame synchronizer object
void gmskframesync_reset(gmskframesync _q)
{
// reset state and counters
_q->state = STATE_DETECTFRAME;
_q->preamble_counter = 0;
_q->header_counter = 0;
_q->payload_counter = 0;
// clear pre-demod buffer
windowcf_clear(_q->buffer);
// reset internal objects
detector_cccf_reset(_q->frame_detector);
// reset carrier recovery objects
nco_crcf_reset(_q->nco_coarse);
// reset sample state
_q->x_prime = 0.0f;
_q->fi_hat = 0.0f;
// reset symbol timing recovery state
firpfb_rrrf_reset(_q->mf);
firpfb_rrrf_reset(_q->dmf);
_q->pfb_q = 0.0f; // filtered error signal
}
// reset frame synchronizer object
void flexframesync_reset(flexframesync _q)
{
// reset binary pre-demod synchronizer
detector_cccf_reset(_q->frame_detector);
// clear pre-demod buffer
windowcf_clear(_q->buffer);
// reset carrier recovery objects
nco_crcf_reset(_q->nco_coarse);
nco_crcf_reset(_q->nco_fine);
// reset symbol timing recovery state
firpfb_crcf_reset(_q->mf);
firpfb_crcf_reset(_q->dmf);
_q->pfb_q = 0.0f; // filtered error signal
// reset state
_q->state = STATE_DETECTFRAME;
_q->pn_counter = 0;
_q->header_counter = 0;
_q->payload_counter = 0;
// reset frame statistics
_q->framestats.evm = 0.0f;
}
// reset WLAN framing synchronizer object internal state
void wlanframesync_reset(wlanframesync _q)
{
// clear buffer
windowcf_clear(_q->input_buffer);
// reset NCO object
nco_crcf_reset(_q->nco_rx);
// reset timers/state
_q->state = WLANFRAMESYNC_STATE_SEEKPLCP;
_q->timer = 0;
_q->num_symbols = 0; // number of received OFDM data symbols
_q->phi_prime = 0.0f; // reset phase offset estimate
// reset pilot sequence generator
wlan_lfsr_reset(_q->ms_pilot);
}
void ofdmoqamframe64sync_reset(ofdmoqamframe64sync _q)
{
// reset pilot sequence generator
msequence_reset(_q->ms_pilot);
// reset auto-correlators
autocorr_cccf_clear(_q->autocorr);
_q->rxx_mag_max = 0.0f;
// reset frequency offset estimation, correction
_q->nu_hat = 0.0f;
nco_crcf_reset(_q->nco_rx);
nco_crcf_reset(_q->nco_pilot);
pll_reset(_q->pll_pilot);
// clear input buffer
windowcf_clear(_q->input_buffer);
// clear analysis filter bank objects
firpfbch_clear(_q->ca0);
firpfbch_clear(_q->ca1);
// reset gain parameters
_q->g = 1.0f; // coarse gain estimate
unsigned int i;
for (i=0; i<_q->num_subcarriers; i++)
_q->G[i] = 1.0f;
for (i=0; i<4; i++)
_q->y_phase[i] = 0.0f;
// reset state
_q->state = OFDMOQAMFRAME64SYNC_STATE_PLCPSHORT;
//_q->state = OFDMOQAMFRAME64SYNC_STATE_PLCPLONG0;
_q->timer = 0;
_q->num_symbols = 0;
_q->num_data_symbols = 0;
_q->num_samples = 0;
_q->sample_phase = 0;
}
