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A Novel K-Repetition Design for SCMA

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arxiv 2205.08149 v1 pith:NUEJ26XV submitted 2022-05-17 cs.IT eess.SPmath.IT

Ke Lai , Zilong Liu , Jing Lei , Lei Wen , Gaojie Chen , Pei Xiao This is my paper · ORCID
classification cs.ITeess.SPmath.IT
keywords k-repetitionscmacodeddetectionimprovedldpcnck-scmanovel
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This work presents a novel K-Repetition based HARQ scheme for LDPC coded uplink SCMA by employing a network coding (NC) principle to encode different packets, where K-Repetition is an emerging technique (recommended in 3GPP Release 15) for enhanced reliability and reduced latency in future massive machine-type communication. Such a scheme is referred to as the NC aided K-repetition SCMA (NCK-SCMA). We introduce a joint iterative detection algorithm for improved detection of the data from the proposed LDPC coded NCKSCMA systems. Simulation results demonstrate the benefits of NCK-SCMA with higher throughput and improved reliability over the conventional K-Repetition SCMA.

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