分组马尔可夫叠加传输5G LDPC码的方案

doi:10.19665/j.issn1001-2400.2022.06.002

Abstract

Abstract:

With the growing demand for high reliability in the enhanced mobile broadband (eMBB) scenario,we present a new class of block Markov superposition transmission codes using 5G low-density parity-check (LDPC) codes as the basic codes.At the transmitter,multiple code blocks (CBs) within a transport block (TB) are encoded separately by 5G LDPC codes,and then superimposed onto the following codewords of the next TB via a row/column interleaver.At the receiver,we present an iterative sliding-window decoding algorithm on a normal graph.Based on the cyclic redundancy check(CRC) in 5G protocols,we also employ a CRC-and-parity-check stopping criterion in the decoding algorithm,with which we can stop the updating procedure of specific codewords which has passed the check.Simulation results show that the proposed scheme using the 5G LDPC code[1 056,528] as the basic code can yield a coding gain of up to 1.2 dB over the conventional 5G LDPC code at the bit-error-rate of 10^-6,and that increasing the size of the decoding window has a limited effect on lowering the error floor.It is also revealed that the complexity of the proposed code is similar to the conventional 5G LDPC codes in the working SNR region.

Key words: block Markov superposition transmission, LDPC codes, 5G

CLC Number:

TN911.22

GUO Kongjing, WANG Qianfan, MA Xiao. Block Markov superposition transmission of 5G LDPC codes[J].Journal of Xidian University, 2022, 49(6): 9-14.

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Block Markov superposition transmission of 5G LDPC codes

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