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fix init_timeshift_rotation()

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Thomas Schlichter
2022-03-14 16:39:17 +01:00
parent baa2e92562
commit 4a90091095
1 changed files with 2 additions and 1 deletions
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openair1/PHY/MODULATION/nr_modulation.c
+2 -1
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@@ -747,8 +747,9 @@ void init_symbol_rotation(NR_DL_FRAME_PARMS *fp) {
void init_timeshift_rotation(NR_DL_FRAME_PARMS *fp)
{
const int sample_offset = fp->nb_prefix_samples / fp->ofdm_offset_divisor;
for (int i = 0; i < fp->ofdm_symbol_size; i++) {
double poff = -i * 2.0 * M_PI * 144.0 / 2048.0 / fp->ofdm_offset_divisor;
double poff = -i * 2.0 * M_PI * sample_offset / fp->ofdm_symbol_size;
double exp_re = cos(poff);
double exp_im = sin(-poff);
fp->timeshift_symbol_rotation[i*2] = (int16_t)round(exp_re * 32767);