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Conference Paper
NOMA Joint Decoding based on Soft-Output Ordered-Statistics Decoder for Short Block Codes
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- Authors
- Chentao Yue, Alva Kosasih, Mahyar Shirvanimoghaddam, Giyoon Park, Ok-Sun Park, Wibowo Hardjawana, Branka Vucetic, Yonghui Li
- Issue Date
- 2022-05
- Citation
- International Conference on Communications (ICC) 2022, pp.2163-2168
- Publisher
- IEEE
- Language
- English
- Type
- Conference Paper
- Abstract
- 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 Keywords
- Bit Error rate, Block codes, Fading Channels, Joint Decoding, Low complexity, Nonorthogonal multiple access(NOMA), Novel technique, Soft-output, Successive Interference Cancellation, convergence speed, lower complexity