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A polar encoding and decoding method and device for combining bch and crc
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A decoding method and BCH code technology, applied in the field of polarized coding and decoding method and device for joint BCH and CRC, can solve the problems that errors cannot be corrected, decoding performance is not greatly helped, and achieve good performance
Active Publication Date: 2020-10-02
白盒子(上海)微电子科技有限公司
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However, the current decoding method uses a general-purpose cyclic redundancy check code (ie, CRC code). CRC can only check errors, but cannot correct errors. It does not greatly help decoding performance, and there is room for improvement.
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Embodiment 1
[0036] This embodiment provides a polar encoding method combining BCH and CRC, such as figure 1 shown, including:
[0037] (101) Divide the information bits to be encoded into P segments; P is greater than or equal to 2;
[0038] (102) Carry out BCH encoding to the first segment to form a BCH code sequence;
[0039] (103) Carry out CRC coding in the 2nd to P segments to form a CRC code sequence;
[0040] (104) merging the BCH code sequence and the CRC code sequence into one sequence;
[0041] (105) Perform polar coding on the merged sequence to form a polar code sequence and complete the coding.
Embodiment 2
[0043] This embodiment provides a decoding method of the encoding method described in Embodiment 1, such as figure 2 shown, including:
[0044] (201) Decoding the first segment of the information bit to be decoded through a continuous depolarizationlist to obtain the polarized decoding sequence of the first segment;
[0045] (202) For the polar decoding sequence of the first segment, perform BCH code generation matrix verification; if the verification is passed, perform (204), otherwise perform BCH decoding and correct the error information bit;
[0046] (203) If the corrected error information bit T is greater than t 1 , then it is judged as a decoding failure, and the decoding ends; if the number of corrected error information bits T is less than or equal to t 1 , then it is judged that the correction is successful, the decoding of the first segment is completed, and (204) is executed. Among them, the BCH code adopts (n, k, t 1 ) represents, where n is the code length ...
Embodiment 3
[0051] This embodiment provides a polar encoding device combining BCH and CRC, including:
[0052] A segment module, configured to divide the information bits to be encoded into P segments, where P is greater than or equal to 2;
[0053] The BCH encoding module is used to perform BCH encoding on the first segment to form a BCH code sequence;
[0054] CRC encoding module, used for performing CRC encoding on the second to P segments to form a CRC code sequence;
[0055] A merging module is used to merge the BCH code sequence and the CRC code sequence into one sequence;
[0056] The polar encoding module is configured to perform polar encoding on the merged sequence to form a polar code sequence and complete the encoding.
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Abstract
The invention discloses a polarized coding / decoding method and device combining BCH with CRC; a coding process comprises the following steps: segmenting information bits; carrying out BCH coding for the first segment, carrying out CRC coding for other segments, and carrying out polarized coding. A decoding process comprises the following steps: segmenting received information bits; carrying out continuous elimination polarized list decoding for the first segment, and then carrying out BCH decoding verifications; carrying out polarized decoding for other segments and making CRC verifications; finish decoding if the verification passes. The method introduces the BCH error correcting code into the first segment in the segment polarized coding and decoding processes so as to replace the CRC check code, thus expressing the BCH code error correction advantages, and providing better performances.
Description
technical field [0001] The present invention relates to communication technology, in particular to a polar encoding and decoding method and device combining BCH and CRC. Background technique [0002] Since the 1980s, the rapid progress of communication technology has brought human society into the information age. The continuous development of wireless mobile communication technology provides a powerful impetus for the process of global informatization. Wireless cellular mobile communication has gone through: first-generation analog communication technology, second-generation digital communication technology, third-generation CDMA broadband communication technology, and has now entered the stage of industrialization and commercialization of 4G systems. While 4G technology is being promoted to industrialization and commercialization, mobile communication after 4G has entered the agenda, and the evolution and development of wireless mobile communication is facing new challeng...
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