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Compute and apply symbol rotation for DL and UL

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- now done according to the proper DL/UL frequency
- this makes it compatible with FDD mode
This commit is contained in:
cig
2021-02-17 14:14:06 +01:00
parent c89d349300
commit e023f67ed8
9 changed files with 84 additions and 41 deletions
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openair1/PHY/MODULATION/ofdm_mod.c
+15 -7
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@@ -306,15 +306,23 @@ void apply_nr_rotation(NR_DL_FRAME_PARMS *fp,
int length) {
int symb_offset = (slot%fp->slots_per_subframe)*fp->symbols_per_slot;
int16_t *symbol_rotation = fp->symbol_rotation[0];
for (int sidx=0;sidx<nsymb;sidx++) {
LOG_D(PHY,"Rotating symbol %d, slot %d, symbol_subframe_index %d, length %d (%d,%d)\n",
first_symbol+sidx,slot,sidx+first_symbol+symb_offset,length,
fp->symbol_rotation[2*(sidx+first_symbol+symb_offset)],fp->symbol_rotation[1+2*(sidx+first_symbol+symb_offset)]);
rotate_cpx_vector(trxdata+(sidx*length*2),
&fp->symbol_rotation[2*(sidx+first_symbol+symb_offset)],
trxdata+(sidx*length*2),
length,
15);
first_symbol + sidx,
slot,
sidx + first_symbol + symb_offset,
length,
symbol_rotation[2 * (sidx + first_symbol + symb_offset)],
symbol_rotation[1 + 2 * (sidx + first_symbol + symb_offset)]);
rotate_cpx_vector(trxdata + (sidx * length * 2),
&symbol_rotation[2 * (sidx + first_symbol + symb_offset)],
trxdata + (sidx * length * 2),
length,
15);
}
}