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학술대회 NOMA Joint Decoding based on Soft-Output Ordered-Statistics Decoder for Short Block Codes
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Chentao Yue, Alva Kosasih, Mahyar Shirvanimoghaddam, 박기윤, 박옥선, Wibowo Hardjawana, Branka Vucetic, 이용휘
International Conference on Communications (ICC) 2022, pp.2163-2168
21HH1200, 셀룰러 기반 산업 자동화 시스템 구축을 위한 5G 성능 한계 극복 저지연, 고신뢰, 초연결 통합 핵심기술 개발, 신재승
In this paper, we design the joint decoding (JD) of non-orthogonal multiple access (NOMA) systems employing short block length codes. We first proposed a low-complexity soft-output ordered-statistics decoding (LC-SOSD) based on a decoding stopping condition, derived from approximations of the a-posterior probabilities of codeword estimates. Simulation results show that LC-SOSD has the similar mutual information transform property to the original SOSD with a significantly reduced complexity. Then, based on the analysis, an efficient JD receiver which combines the parallel interference cancellation (PIC) and the proposed LC-SOSD is developed for NOMA systems. Two novel techniques, namely decoding switch (DS) and decoding combiner (DC), are introduced to accelerate the convergence speed. Simulation results show that the proposed receiver can achieve a lower bit-error rate (BER) compared to the successive interference cancellation (SIC) decoding over the additive-white-Gaussian-noise (AWGN) and fading channel, with a lower complexity in terms of the number of decoding iterations.
KSP 제안 키워드
Bit-error-rate(BER), Block codes, Joint decoding, Non-orthogonal multiple access(NOMA), Novel technique, Reduced complexity, Soft-output, Successive Interference Cancellation, convergence speed, fading channel, low-complexity