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Refactor rx_nr_prach

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This commit is contained in:
Laurent THOMAS
2025-10-30 11:54:44 +01:00
committed by Robert Schmidt
parent d745e6fcd3
commit fff95cc075
1 changed files with 6 additions and 7 deletions
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openair1/PHY/NR_TRANSPORT/nr_prach.c
+6 -7
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@@ -409,7 +409,6 @@ void rx_nr_prach_ru(prach_item_t *p, int32_t **rxdata, NR_DL_FRAME_PARMS *fp, in
rx_prach_out_t rx_nr_prach(const prach_item_t *in, int occasion)
{
rx_prach_out_t out = {};
c16_t **input = in->rxsigF[occasion];
uint16_t preamble_index0 = 0;
uint16_t numshift = 0;
int first_nonzero_root_idx = 0;
@@ -453,7 +452,7 @@ rx_prach_out_t rx_nr_prach(const prach_item_t *in, int occasion)
int32_t prach_ifft[dft_sz] __attribute__((aligned(32)));
for (int preamble_index = 0; preamble_index < 64; preamble_index++) {
if (LOG_DEBUGFLAG(DEBUG_PRACH)) {
int en = dB_fixed(signal_energy((int32_t *)input[0], N_ZC == 839 ? 840 : 140));
int en = dB_fixed(signal_energy((int32_t *)in->rxsigF[occasion][0], N_ZC == 839 ? 840 : 140));
if (en > 60)
LOG_D(PHY, "frame %d, slot %d : Trying preamble %d \n", in->frame, in->slot, preamble_index);
}
@@ -527,9 +526,9 @@ rx_prach_out_t rx_nr_prach(const prach_item_t *in, int occasion)
first_nonzero_root_idx = preamble_offset;
}
// Compute DFT of RX signal (conjugate input, results in conjugate output) for each new rootSequenceIndex
// Compute DFT of RX signal (conjugate in->rxsigF[occasion], results in conjugate output) for each new rootSequenceIndex
if (LOG_DEBUGFLAG(DEBUG_PRACH)) {
int en = dB_fixed(signal_energy((int32_t *)input[0], 840));
int en = dB_fixed(signal_energy((int32_t *)in->rxsigF[occasion][0], 840));
if (en>60)
LOG_D(PHY,
"frame %d, slot %d : preamble index %d, NCS %d, N_ZC/NCS %d: offset %d, preamble shift %d , en %d)\n",
@@ -558,14 +557,14 @@ rx_prach_out_t rx_nr_prach(const prach_item_t *in, int occasion)
memset(prach_ifft, 0, sizeof(prach_ifft));
if (LOG_DUMPFLAG(DEBUG_PRACH)) {
LOG_M("prach_rxF0.m", "prach_rxF0", input[0], N_ZC, 1, 1);
LOG_M("prach_rxF1.m", "prach_rxF1", input[1], 6144, 1, 1);
LOG_M("prach_rxF0.m", "prach_rxF0", in->rxsigF[occasion][0], N_ZC, 1, 1);
LOG_M("prach_rxF1.m", "prach_rxF1", in->rxsigF[occasion][1], 6144, 1, 1);
}
c16_t prachF[dft_sz] __attribute__((aligned(32)));
for (int aa = 0; aa < nb_rx; aa++) {
// Do componentwise product with Xu* on each antenna
for (int offset = 0; offset < N_ZC; offset++) {
prachF[offset] = c16MulConjShift(Xu[offset], input[aa][offset], 15);
prachF[offset] = c16MulConjShift(Xu[offset], in->rxsigF[occasion][aa][offset], 15);
}
memset(prachF + N_ZC, 0, sizeof(*prachF) * (dft_sz - N_ZC));
// Now do IFFT of size 1024 (N_ZC=839) or 256 (N_ZC=139)