86 lines
2.8 KiB
C
86 lines
2.8 KiB
C
/*
|
|
* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership.
|
|
* The OpenAirInterface Software Alliance licenses this file to You under
|
|
* the OAI Public License, Version 1.1 (the "License"); you may not use this file
|
|
* except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.openairinterface.org/?page_id=698
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*-------------------------------------------------------------------------------
|
|
* For more information about the OpenAirInterface (OAI) Software Alliance:
|
|
* contact@openairinterface.org
|
|
*/
|
|
|
|
#include "PHY/defs_eNB.h"
|
|
#include <math.h>
|
|
#include "PHY/sse_intrin.h"
|
|
#include "modulation_extern.h"
|
|
|
|
void remove_7_5_kHz(RU_t *ru,uint8_t slot)
|
|
{
|
|
|
|
c16_t **rxdata=(c16_t **)ru->common.rxdata;
|
|
c16_t **rxdata_7_5kHz=(c16_t **)ru->common.rxdata_7_5kHz;
|
|
int16_t *kHz7_5;
|
|
|
|
LTE_DL_FRAME_PARMS *frame_parms=ru->frame_parms;
|
|
|
|
switch (frame_parms->N_RB_UL) {
|
|
|
|
case 6:
|
|
kHz7_5 = (frame_parms->Ncp==0) ? s6n_kHz_7_5 : s6e_kHz_7_5;
|
|
break;
|
|
|
|
case 15:
|
|
kHz7_5 = (frame_parms->Ncp==0) ? s15n_kHz_7_5 : s15e_kHz_7_5;
|
|
break;
|
|
|
|
case 25:
|
|
kHz7_5 = (frame_parms->Ncp==0) ? s25n_kHz_7_5 : s25e_kHz_7_5;
|
|
break;
|
|
|
|
case 50:
|
|
kHz7_5 = (frame_parms->Ncp==0) ? s50n_kHz_7_5 : s50e_kHz_7_5;
|
|
break;
|
|
|
|
case 75:
|
|
kHz7_5 = (frame_parms->Ncp==0) ? s75n_kHz_7_5 : s75e_kHz_7_5;
|
|
break;
|
|
|
|
case 100:
|
|
kHz7_5 = (frame_parms->Ncp==0) ? s100n_kHz_7_5 : s100e_kHz_7_5;
|
|
break;
|
|
|
|
default:
|
|
kHz7_5 = (frame_parms->Ncp==0) ? s25n_kHz_7_5 : s25e_kHz_7_5;
|
|
break;
|
|
}
|
|
|
|
uint32_t slot_offset = ((uint32_t)slot * frame_parms->samples_per_tti/2)-ru->N_TA_offset;
|
|
uint32_t slot_offset2 = (uint32_t)(slot&1) * frame_parms->samples_per_tti/2;
|
|
|
|
uint16_t len = frame_parms->samples_per_tti/2;
|
|
|
|
for (uint8_t aa=0; aa<ru->nb_rx; aa++) {
|
|
c16_t *rxptr = rxdata[aa]+slot_offset;
|
|
c16_t *rxptr_7_5kHz = rxdata_7_5kHz[aa]+slot_offset2;
|
|
// apply 7.5 kHz
|
|
mult_complex_vectors((c16_t*)kHz7_5,rxptr,rxptr_7_5kHz,len, 15);
|
|
// undo 7.5 kHz offset for symbol 3 in case RU is slave (for OTA synchronization)
|
|
if (ru->is_slave == 1 && slot == 2){
|
|
int offset=3*frame_parms->ofdm_symbol_size+2*frame_parms->nb_prefix_samples+frame_parms->nb_prefix_samples0;
|
|
memcpy(rxdata_7_5kHz[aa]+offset,
|
|
rxdata[aa]+offset,
|
|
(frame_parms->ofdm_symbol_size + frame_parms->nb_prefix_samples)*sizeof(c16_t));
|
|
}
|
|
}
|
|
}
|