59 lines
2.5 KiB
C
59 lines
2.5 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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#include "PHY/CODING/nrPolar_tools/nr_polar_defs.h"
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// ----- Old implementation ----
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const uint8_t **crc24c_generator_matrix(uint16_t payloadSizeBits)
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{
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uint8_t crcPolynomialPattern[25] = {1, 1, 0, 1, 1, 0, 0, 1, 0, 1, 0, 1, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 1, 1};
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// 1011 0010 1011 0001 0001 0111 D^24 + D^23 + D^21 + D^20 + D^17 + D^15 + D^13 + D^12 + D^8 + D^4 + D^2 + D + 1
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uint8_t crcPolynomialSize = 24;
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uint8_t temp1[crcPolynomialSize], temp2[crcPolynomialSize];
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uint8_t **crc_generator_matrix =
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malloc_or_fail(payloadSizeBits * sizeof(uint8_t *) + payloadSizeBits * crcPolynomialSize * sizeof(uint8_t));
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if (crc_generator_matrix)
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for (int i = 0; i < payloadSizeBits; i++)
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crc_generator_matrix[i] = ((uint8_t *)&crc_generator_matrix[payloadSizeBits]) + i * crcPolynomialSize;
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for (int i = 0; i < crcPolynomialSize; i++)
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crc_generator_matrix[payloadSizeBits - 1][i] = crcPolynomialPattern[i + 1];
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for (int i = payloadSizeBits - 2; i >= 0; i--) {
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for (int j = 0; j < crcPolynomialSize - 1; j++)
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temp1[j] = crc_generator_matrix[i + 1][j + 1];
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temp1[crcPolynomialSize - 1] = 0;
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for (int j = 0; j < crcPolynomialSize; j++)
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temp2[j] = crc_generator_matrix[i + 1][0] * crcPolynomialPattern[j + 1];
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for (int j = 0; j < crcPolynomialSize; j++) {
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if (temp1[j] + temp2[j] == 1)
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crc_generator_matrix[i][j] = 1;
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else
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crc_generator_matrix[i][j] = 0;
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}
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}
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return (const uint8_t **)crc_generator_matrix;
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}
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