Cedric Roux
56c66c09aa
Pre-ci test passed git-svn-id: http://svn.eurecom.fr/openair4G/trunk@4000 818b1a75-f10b-46b9-bf7c-635c3b92a50f
133 lines
3.7 KiB
C
133 lines
3.7 KiB
C
#include "PHY/defs.h"
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#include "defs.h"
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//#define DEBUG_FEP
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int slot_fep_ul(LTE_DL_FRAME_PARMS *frame_parms,
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LTE_eNB_COMMON *eNB_common_vars,
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unsigned char l,
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unsigned char Ns,
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unsigned char eNB_id,
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int no_prefix) {
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#ifdef DEBUG_FEP
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char fname[40], vname[40];
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#endif
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unsigned char aa;
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unsigned char symbol = l+((7-frame_parms->Ncp)*(Ns&1)); ///symbol within sub-frame
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unsigned int nb_prefix_samples = (no_prefix ? 0 : frame_parms->nb_prefix_samples);
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unsigned int nb_prefix_samples0 = (no_prefix ? 0 : frame_parms->nb_prefix_samples0);
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// unsigned int subframe_offset;
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unsigned int slot_offset;
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void (*dft)(int16_t *,int16_t *, int);
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switch (frame_parms->log2_symbol_size) {
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case 7:
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dft = dft128;
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break;
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case 8:
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dft = dft256;
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break;
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case 9:
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dft = dft512;
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break;
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case 10:
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dft = dft1024;
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break;
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case 11:
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dft = dft2048;
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break;
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default:
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dft = dft512;
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break;
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}
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if (no_prefix) {
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// subframe_offset = frame_parms->ofdm_symbol_size * frame_parms->symbols_per_tti * (Ns>>1);
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slot_offset = frame_parms->ofdm_symbol_size * (frame_parms->symbols_per_tti>>1) * (Ns%2);
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}
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else {
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// subframe_offset = frame_parms->samples_per_tti * (Ns>>1);
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slot_offset = (frame_parms->samples_per_tti>>1) * (Ns%2);
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}
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if (l<0 || l>=7-frame_parms->Ncp) {
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msg("slot_fep: l must be between 0 and %d\n",7-frame_parms->Ncp);
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return(-1);
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}
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if (Ns<0 || Ns>=20) {
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msg("slot_fep: Ns must be between 0 and 19\n");
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return(-1);
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}
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#ifdef DEBUG_FEP
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msg("slot_fep: Ns %d offset %d, symbol %d, nb_prefix_samples %d\n",Ns,slot_offset,symbol, nb_prefix_samples);
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#endif
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for (aa=0;aa<frame_parms->nb_antennas_rx;aa++) {
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if (l==0) {
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#ifndef NEW_FFT
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fft(
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#ifndef OFDMA_ULSCH
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(short *)&eNB_common_vars->rxdata_7_5kHz[eNB_id][aa][slot_offset +
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nb_prefix_samples0],
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#else
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(short *)&eNB_common_vars->rxdata[eNB_id][aa][((frame_parms->samples_per_tti>>1)*Ns) +
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nb_prefix_samples0],
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#endif
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(short*)&eNB_common_vars->rxdataF[eNB_id][aa][2*frame_parms->ofdm_symbol_size*symbol],
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frame_parms->twiddle_fft,
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frame_parms->rev,
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frame_parms->log2_symbol_size,
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frame_parms->log2_symbol_size>>1,
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0);
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#else
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dft(
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#ifndef OFDMA_ULSCH
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(int16_t *)&eNB_common_vars->rxdata_7_5kHz[eNB_id][aa][slot_offset +
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nb_prefix_samples0],
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#else
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(int16_t *)&eNB_common_vars->rxdata[eNB_id][aa][((frame_parms->samples_per_tti>>1)*Ns) +
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nb_prefix_samples0],
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#endif
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(int16_t *)&eNB_common_vars->rxdataF[eNB_id][aa][frame_parms->ofdm_symbol_size*symbol],1);
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#endif
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}
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else {
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#ifndef NEW_FFT
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fft(
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#ifndef OFDMA_ULSCH
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(short *)&eNB_common_vars->rxdata_7_5kHz[eNB_id][aa][slot_offset +
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#else
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(short *)&eNB_common_vars->rxdata[eNB_id][aa][((frame_parms->samples_per_tti>>1)*Ns) +
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#endif
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(frame_parms->ofdm_symbol_size+nb_prefix_samples0+nb_prefix_samples) +
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(frame_parms->ofdm_symbol_size+nb_prefix_samples)*(l-1)],
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(short*)&eNB_common_vars->rxdataF[eNB_id][aa][2*frame_parms->ofdm_symbol_size*symbol],
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frame_parms->twiddle_fft,
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frame_parms->rev,
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frame_parms->log2_symbol_size,
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frame_parms->log2_symbol_size>>1,
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0);
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#else
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dft(
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#ifndef OFDMA_ULSCH
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(short *)&eNB_common_vars->rxdata_7_5kHz[eNB_id][aa][slot_offset +
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#else
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(short *)&eNB_common_vars->rxdata[eNB_id][aa][((frame_parms->samples_per_tti>>1)*Ns) +
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#endif
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(frame_parms->ofdm_symbol_size+nb_prefix_samples0+nb_prefix_samples) +
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(frame_parms->ofdm_symbol_size+nb_prefix_samples)*(l-1)],
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(short*)&eNB_common_vars->rxdataF[eNB_id][aa][frame_parms->ofdm_symbol_size*symbol],1);
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#endif
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}
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}
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#ifdef DEBUG_FEP
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msg("slot_fep: done\n");
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#endif
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return(0);
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}
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