LLR Processing of Polar Codes in Concatenation Systems  

作　　者：Ya Meng Yi Fang Chuan Zhang Liping Li 

机构地区：[1]Key Laboratory of Intelligent Computing and Signal Processing of the Ministry of Education of China,Anhui University,Hefei 230031,China [2]School of Information Engineering,Guangdong University of Technology,Guangzhou 510006,China [3]National Mobile Communications Research Laboratory,Southeast University,Nanjing,China

出　　处：《China Communications》2019年第9期201-208,共8页中国通信（英文版）

基　　金：supported in part by National Natural Science Foundation of China through grant 61501002;in part by Natural Science Project of Ministry of Education of Anhui through grant KJ2015A102;in part by Talents Recruitment Program of Anhui University;in part by the Key Laboratory Project of the Key Laboratory of Intelligent Computing and Signal Processing of the Ministry of Education of China, Anhui University

摘　　要：This paper studies the decoding performance of low-density parity-check(LDPC)codes in a serial concatenation system with polar codes employing the successive cancellation(SC)decoding.It is known that the absolute incorrect log-likelihood ratio(LLR)values from the SC decoding can be very large.This phenomenon dramatically deteriorates the error correcting performance of the outer LDPC codes.In this paper,the LLR values of polar codes are regulated by a log processing before being sent to the LDPC decoder.Simulation results show that the log processing is an efficient approach with a low optimization complexity compared with the existing procedures to improve the performance of the serial concatenation systems.This paper studies the decoding performance of low-density parity-check(LDPC)codes in a serial concatenation system with polar codes employing the successive cancellation(SC) decoding. It is known that the absolute incorrect log-likelihood ratio(LLR) values from the SC decoding can be very large.This phenomenon dramatically deteriorates the error correcting performance of the outer LDPC codes. In this paper, the LLR values of polar codes are regulated by a log processing before being sent to the LDPC decoder. Simulation results show that the log processing is an efficient approach with a low optimization complexity compared with the existing procedures to improve the performance of the serial concatenation systems.

关 键 词：POLAR CODES SC DECODING LDPCcodes CONCATENATION 

分 类 号：TN9[电子电信—信息与通信工程]