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git-svn-id: http://svn.eurecom.fr/openair4G/trunk@5739 818b1a75-f10b-46b9-bf7c-635c3b92a50f

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This commit is contained in:
Raymond Knopp
2014-08-21 11:51:01 +00:00
parent b1e97ab181
commit d2bf4ddcd4
21 changed files with 168 additions and 239 deletions
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openair1/PHY/MODULATION/ofdm_mod.c
+61 -1
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@@ -37,7 +37,7 @@ This section deals with basic functions for OFDM Modulation.
*/
#include "PHY/defs.h"
#include "UTIL/LOG/log.h"
//static short temp2[2048*4] __attribute__((aligned(16)));
@@ -244,4 +244,64 @@ void PHY_ofdm_mod(int *input, /// pointer to complex input
*/
}
void do_OFDM_mod(mod_sym_t **txdataF, int32_t **txdata, uint32_t frame,uint16_t next_slot, LTE_DL_FRAME_PARMS *frame_parms) {
int aa, slot_offset, slot_offset_F;
slot_offset_F = (next_slot)*(frame_parms->ofdm_symbol_size)*((frame_parms->Ncp==1) ? 6 : 7);
slot_offset = (next_slot)*(frame_parms->samples_per_tti>>1);
for (aa=0; aa<frame_parms->nb_antennas_tx; aa++) {
if (is_pmch_subframe(frame,next_slot>>1,frame_parms)) {
if ((next_slot%2)==0) {
LOG_D(PHY,"Frame %d, subframe %d: Doing MBSFN modulation (slot_offset %d)\n",frame,next_slot>>1,slot_offset);
PHY_ofdm_mod(&txdataF[aa][slot_offset_F], // input
&txdata[aa][slot_offset], // output
frame_parms->log2_symbol_size, // log2_fft_size
12, // number of symbols
frame_parms->ofdm_symbol_size>>2, // number of prefix samples
frame_parms->twiddle_ifft, // IFFT twiddle factors
frame_parms->rev, // bit-reversal permutation
CYCLIC_PREFIX);
if (frame_parms->Ncp == EXTENDED)
PHY_ofdm_mod(&txdataF[aa][slot_offset_F], // input
&txdata[aa][slot_offset], // output
frame_parms->log2_symbol_size, // log2_fft_size
2, // number of symbols
frame_parms->nb_prefix_samples, // number of prefix samples
frame_parms->twiddle_ifft, // IFFT twiddle factors
frame_parms->rev, // bit-reversal permutation
CYCLIC_PREFIX);
else {
LOG_D(PHY,"Frame %d, subframe %d: Doing PDCCH modulation\n",frame,next_slot>>1);
normal_prefix_mod(&txdataF[aa][slot_offset_F],
&txdata[aa][slot_offset],
2,
frame_parms);
}
}
}
else {
if (frame_parms->Ncp == EXTENDED)
PHY_ofdm_mod(&txdataF[aa][slot_offset_F], // input
&txdata[aa][slot_offset], // output
frame_parms->log2_symbol_size, // log2_fft_size
6, // number of symbols
frame_parms->nb_prefix_samples, // number of prefix samples
frame_parms->twiddle_ifft, // IFFT twiddle factors
frame_parms->rev, // bit-reversal permutation
CYCLIC_PREFIX);
else {
normal_prefix_mod(&txdataF[aa][slot_offset_F],
&txdata[aa][slot_offset],
7,
frame_parms);
}
}
}
}
/** @} */