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removal of mean signal level

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This commit is contained in:
Raymond Knopp
2021-10-06 22:43:06 +02:00
parent d9235268b4
commit 3549168347
2 changed files with 45 additions and 13 deletions
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executables/nr-ru.c
+5 -1
View File
@@ -1367,7 +1367,10 @@ void *ru_thread( void *param ) {
initial_wait=0;
opp_enabled = opp_enabled0;
}
if (initial_wait == 0 && ru->rx_fhaul.trials > 1000) reset_meas(&ru->rx_fhaul);
if (initial_wait == 0 && ru->rx_fhaul.trials > 1000) reset_meas(&ru->rx_fhaul);
proc->timestamp_tx = proc->timestamp_rx + (sf_ahead*fp->samples_per_subframe);
proc->frame_tx = (proc->tti_rx > (fp->slots_per_frame-1-(fp->slots_per_subframe*sf_ahead))) ? (proc->frame_rx+1)&1023 : proc->frame_rx;
proc->tti_tx = (proc->tti_rx + (fp->slots_per_subframe*sf_ahead))%fp->slots_per_frame;
@@ -1387,6 +1390,7 @@ void *ru_thread( void *param ) {
if (ru->feprx) {
ru->feprx(ru,proc->tti_rx);
//LOG_M("rxdata.m","rxs",ru->common.rxdata[0],1228800,1,1);
if (initial_wait == 0 && proc->frame_rx == 127 ) {LOG_M("rxdata.m","rxs",ru->common.rxdata[0],fp->samples_per_frame,1,1); LOG_M("rxdataF.m","rxsF",RC.gNB[0]->common_vars.rxdataF[0],fp->symbols_per_slot*fp->ofdm_symbol_size,1,1); exit(-1);}
LOG_D(PHY,"RU proc: frame_rx = %d, tti_rx = %d\n", proc->frame_rx, proc->tti_rx);
/*
LOG_D(PHY,"Copying rxdataF from RU to gNB\n");
targets/ARCH/USRP/USERSPACE/LIB/usrp_lib.cpp
+40 -12
View File
@@ -676,25 +676,53 @@ static int trx_usrp_read(openair0_device *device, openair0_timestamp *ptimestamp
// bring RX data into 12 LSBs for softmodem RX
for (int i=0; i<cc; i++) {
for (int j=0; j<nsamps2; j++) {
#if defined(__x86_64__) || defined(__i386__)
#ifdef __AVX2__
// FK: in some cases the buffer might not be 32 byte aligned, so we cannot use avx2
__m256i mean=_mm256_setzero_si256();
int16_t mean16[2];
if ((((uintptr_t) buff[i])&0x1F)==0) {
((__m256i *)buff[i])[j] = _mm256_srai_epi16(buff_tmp[i][j],rxshift);
} else {
((__m128i *)buff[i])[2*j] = _mm_srai_epi16(((__m128i *)buff_tmp[i])[2*j],rxshift);
((__m128i *)buff[i])[2*j+1] = _mm_srai_epi16(((__m128i *)buff_tmp[i])[2*j+1],rxshift);
}
for (int j=0; j<nsamps2<<1; j++) {
mean=_mm256_add_epi32(mean,_mm256_cvtepi16_epi32(((__m128i*)buff_tmp[i])[j]));
}
mean16[0] =(int16_t)((_mm256_extract_epi32(mean,0) + _mm256_extract_epi32(mean,2) + _mm256_extract_epi32(mean,4) + _mm256_extract_epi32(mean,6))/nsamps);
mean16[1] =(int16_t)((_mm256_extract_epi32(mean,1) + _mm256_extract_epi32(mean,3) + _mm256_extract_epi32(mean,5) + _mm256_extract_epi32(mean,7))/nsamps);
/*
LOG_I(PHY,"mean16[0] %d mean16[1] %d (%d,%d,%d,%d,%d,%d,%d,%d)\n",mean16[0],mean16[1],
_mm256_extract_epi32(mean,0),
_mm256_extract_epi32(mean,1),
_mm256_extract_epi32(mean,2),
_mm256_extract_epi32(mean,3),
_mm256_extract_epi32(mean,4),
_mm256_extract_epi32(mean,5),
_mm256_extract_epi32(mean,6),
_mm256_extract_epi32(mean,7)); */
if ((((uintptr_t) buff[i])&0x1F)==0) {
mean = _mm256_set1_epi32(*(uint32_t*)mean16);// FK: in some cases the buffer might not be 32 byte aligned, so we cannot use avx2
#else
((__m128i *)buff[i])[j] = _mm_srai_epi16(buff_tmp[i][j],rxshift);
for (int j=0; j<nsamps2; j++)
((__m256i *)buff[i])[j] = _mm256_srai_epi16(_mm256_subs_epi16(buff_tmp[i][j],mean),rxshift);
} else {
__m128i mean128 = _mm_set1_epi32(*(uint32_t*)mean16);
for (int j=0; j<(nsamps2<<1); j++)
((__m128i *)buff[i])[j] = _mm_srai_epi16(_mm_subs_epi16(((__m128i *)buff_tmp[i])[j],mean128),rxshift);
}
#else
__m128i mean=mm_setzero_si128();
for (int j=0; j<nsamps2<<1; j++) {
mean=_mm_adds_epi32(mean,_mm_cvtepi16_epi32(((__m64*)buff_tmp[i])[j]));
}
mean16[0] =(int16_t)(( _mm_extract_epi32(mean,0) + _mm_extract_epi32(mean,2))/nsamps);
mean16[1] =(int16_t)(( _mm_extract_epi32(mean,1) + _mm_extract_epi32(mean,3))/nsamps);
mean = _mm_set1_epi32(*(uint32_t*)mean16);
for (int j=0; j<nsamps2; j++)
((__m128i *)buff[i])[j] = _mm_srai_epi16(_mm_subs_epi16(buff_tmp[i][j],mean),rxshift);
#endif
#elif defined(__arm__)
for (int j=0; j<nsamps2; j++)
((int16x8_t *)buff[i])[j] = vshrq_n_s16(buff_tmp[i][j],rxshift);
#endif
}
}
if (samples_received < nsamps) {
@@ -1098,7 +1126,7 @@ extern "C" {
if (device->type==USRP_X300_DEV) {
openair0_cfg[0].rx_gain_calib_table = calib_table_x310;
std::cerr << "-- Using calibration table: calib_table_x310" << std::endl;
s->usrp->set_rx_dc_offset(true);
// s->usrp->set_rx_dc_offset(true);
}
if (device->type==USRP_N300_DEV) {