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srsLTE
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Modify PUSCH power normalization 

The PUSCH signal was normalized to fix the maximum amplitude instead of
the transmitted power.
This commit is contained in:
dvdgrgrtt 2021-11-04 15:29:44 +01:00 committed by dvdgrgrtt
parent 7d8c519865
commit a4b86e5a0a
1 changed files with 3 additions and 6 deletions
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9
lib/src/phy/ue/ue_ul_nr.c
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@ -133,12 +133,9 @@ int srsran_ue_ul_nr_encode_pusch(srsran_ue_ul_nr_t* q,
// Generate signal
srsran_ofdm_tx_sf(&q->ifft);
// Normalise to peak
uint32_t max_idx = srsran_vec_max_abs_ci(q->ifft.cfg.out_buffer, q->ifft.sf_sz);
float max_peak = cabsf(q->ifft.cfg.out_buffer[max_idx]);
if (isnormal(max_peak)) {
srsran_vec_sc_prod_cfc(q->ifft.cfg.out_buffer, 0.99f / max_peak, q->ifft.cfg.out_buffer, q->ifft.sf_sz);
}
// Scale iFFT output to compensate for iFFT amplification (due to FFTW implementation).
float scaling = 1 / sqrtf(q->ifft.cfg.symbol_sz);
srsran_vec_sc_prod_cfc(q->ifft.cfg.out_buffer, scaling, q->ifft.cfg.out_buffer, q->ifft.sf_sz);
// Apply frequency offset
if (isnormal(q->freq_offset_hz)) {