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Merge remote-tracking branch 'origin/init_symbol_rotation_optimization' into integration_2022_wk31b

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This commit is contained in:
Robert Schmidt
2022-08-04 18:49:33 +02:00
parent 0352f98467 48019c33f4
commit cb4e60eed3
1 changed files with 8 additions and 17 deletions
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openair1/PHY/MODULATION/nr_modulation.c
+8 -17
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@@ -618,32 +618,23 @@ void init_symbol_rotation(NR_DL_FRAME_PARMS *fp) {
for (uint8_t ll = 0; ll < 2; ll++){
double f0 = f[ll];
double Ncpm1 = Ncp0;
LOG_I(PHY, "Doing symbol rotation calculation for gNB TX/RX, f0 %f Hz, Nsymb %d\n", f0, nsymb);
c16_t *symbol_rotation = fp->symbol_rotation[ll];
double tl = 0;
double poff = 2 * M_PI * ((Ncp0 * Tc)) * f0;
double exp_re = cos(poff);
double exp_im = sin(-poff);
symbol_rotation[0].r = (int16_t)floor(exp_re * 32767);
symbol_rotation[0].i = (int16_t)floor(exp_im * 32767);
LOG_I(PHY, "Doing symbol rotation calculation for gNB TX/RX, f0 %f Hz, Nsymb %d\n", f0, nsymb);
LOG_I(PHY, "Symbol rotation %d/%d => (%d,%d)\n",
0,
nsymb,
symbol_rotation[0].r,
symbol_rotation[0].i);
double tl = 0.0;
double poff = 0.0;
double exp_re = 0.0;
double exp_im = 0.0;
for (int l = 1; l < nsymb; l++) {
for (int l = 0; l < nsymb; l++) {
double Ncp;
if (l == (7 * (1 << fp->numerology_index))) {
if (l == 0 || l == (7 * (1 << fp->numerology_index))) {
Ncp = Ncp0;
} else {
Ncp = Ncp1;
}
tl += (Nu + Ncpm1) * Tc;
poff = 2 * M_PI * (tl + (Ncp * Tc)) * f0;
exp_re = cos(poff);
exp_im = sin(-poff);
@@ -658,7 +649,7 @@ void init_symbol_rotation(NR_DL_FRAME_PARMS *fp) {
symbol_rotation[l].i,
(poff / 2 / M_PI) - floor(poff / 2 / M_PI));
Ncpm1 = Ncp;
tl += (Nu + Ncp) * Tc;
}
}