Melissa Elkadi
a0a2248ea1
Implement the #define variables required for synchronization: These variables include offset and payload size values that vary from the Uu interface, in relation to the PSS, SSS and PBCH elements. We also introduce the new sl_mode command line flag, which is used to switch between the Uu interface and SL interface. This will allow us to modify exisitng PSS and SSS functions, without copying complete 5G functions and only changing a few lines to support sidelink mode. Fixing formatting for softmodem-common.h
97 lines
4.3 KiB
C
97 lines
4.3 KiB
C
/*
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* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The OpenAirInterface Software Alliance licenses this file to You under
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* the OAI Public License, Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.openairinterface.org/?page_id=698
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*-------------------------------------------------------------------------------
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* For more information about the OpenAirInterface (OAI) Software Alliance:
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* contact@openairinterface.org
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*/
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/**********************************************************************
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*
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* FILENAME : ss_pbch_nr.h
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*
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* MODULE : this file contains define only
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*
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* DESCRIPTION : define elements related to SS/PBCH block ie synchronisation (pss/sss) and pbch
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*
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* see TS 38.211 7.4.2 Synchronisation Signals
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* see TS 38.213 4 Synchronisation procedures
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*
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************************************************************************/
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#ifndef SS_PBCH_NR_H
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#define SS_PBCH_NR_H
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/************** DEFINE ********************************************/
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#define VOID_PARAMETER (void) /* avoid a compiler warning for unused parameters of function */
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/* PSS parameters */
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#define NUMBER_PSS_SEQUENCE (3)
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#define NUMBER_PSS_SEQUENCE_SL (2)
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#define PSS_SSS_SUB_CARRIER_START (56)
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#define PSS_SSS_SUB_CARRIER_START_SL (2)
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#define INVALID_PSS_SEQUENCE (NUMBER_PSS_SEQUENCE)
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#define LENGTH_PSS_NR (127)
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#define N_SC_RB (12) /* Resource block size in frequency domain expressed as a number if subcarriers */
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#define SCALING_PSS_NR (3)
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#define SCALING_CE_PSS_NR (13) /* scaling channel estimation based on ps */
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#define PSS_IFFT_SIZE (256)
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#define PSS_SC_START_NR (52) /* see from TS 38.211 table 7.4.3.1-1: Resources within an SS/PBCH block for PSS... */
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/* define ofdm symbol offset in the SS/PBCH block of NR synchronisation */
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#ifdef NR_UNIT_TEST
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#define OFFSET_SS_PBCH (0)
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#else
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#define OFFSET_SS_PBCH (4)
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#endif
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#define PSS_SYMBOL_NB ((0) + OFFSET_SS_PBCH) /* symbol numbers for each element */
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#define PBCH_SYMBOL_NB ((1) + OFFSET_SS_PBCH)
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#define SSS_SYMBOL_NB ((2) + OFFSET_SS_PBCH)
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#define PBCH_LAST_SYMBOL_NB ((3) + OFFSET_SS_PBCH)
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#define OFFSET_SS_PSBCH -1
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#define PSS0_SL_SYMBOL_NB ((1) + OFFSET_SS_PSBCH)
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#define PSS1_SL_SYMBOL_NB ((2) + OFFSET_SS_PSBCH)
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#define SSS0_SL_SYMBOL_NB ((3) + OFFSET_SS_PSBCH)
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#define SSS1_SL_SYMBOL_NB ((4) + OFFSET_SS_PSBCH)
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/* SS/PBCH parameters */
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#define N_RB_SS_PBCH_BLOCK (20)
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#define NB_SYMBOLS_PBCH (3)
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#define NR_N_SYMBOLS_SSB (4)
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#define IQ_SIZE sizeof(c16_t) /* I and Q are alternatively stored into buffers */
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#define N_SYMB_SLOT (14)
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/* SS/PBCH parameters : see from TS 38.211 table 7.4.3.1-1: Resources within an SS/PBCH block for PSS... */
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#define DMRS_PBCH_PER_RB (N_SC_RB >> 4) /* at 0+v, 4+v, 8+v for a resource block with v = NcellID modulo 4 */
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#define DMRS_END_FIRST_PART (44)
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#define DMRS_START_SECOND_PART (192)
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#define DMRS_END_SECOND_PART (236)
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#define DMRS_PBCH_NUMBER (NB_SYMBOLS_PBCH*(N_RB_SS_PBCH_BLOCK * DMRS_PBCH_PER_RB)) /* there are both PBCH and SSS/(Set to 0) at the second OFDM symbol of SS/PBCH so size is increased */
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/* see TS 38211 7.4.1.4 Demodulation reference signals for PBCH */
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#define DMRS_PBCH_I_SSB (8) /* maximum index value for SSB/PBCH which can have alength of L=4 or L=8 */
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#define DMRS_PBCH_N_HF (2) /* half frame indication - 0 for first part of frame and 1 for second part of frame */
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#endif /* SS_PBCH_NR_H */
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