Rateless Coding Based Incremental Redundancy HARQ Scheme for SCMA Systems

Zhu, Min; He, Qingli; Zhang, Rui; Bai, Baoming

doi:10.1007/s11036-017-0968-9

Cited by 1 publication

(1 citation statement)

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“…This paper focuses on exploring the performance of an RC-LDPC code-based IR-HARQ scheme for SCMA systems. In [ 23 ], Zhu et al explain the fundamental principle of this scheme and present a joint detection and decoding algorithm. However, the incremental decoder utilized in their work is solely related to the detection in the current transmission round, and not across different rounds.…”

Section: Introductionmentioning

confidence: 99%

Windowed Joint Detection and Decoding with IR-HARQ for Asynchronous SCMA Systems

Guan

Zhu

Bai

2023

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To improve the decoding performance of asynchronous sparse code multiple access (SCMA) systems over additive white Gaussian noise (AWGN) channels, this paper proposes a novel windowed joint detection and decoding algorithm for a rate-compatible (RC), LDPC code-based, incremental redundancy (IR) hybrid automatic repeat quest (HARQ) scheme. Since incremental decoding can exchange information iteratively with the detections made at previous consecutive time units, we propose a windowed joint detection and decoding algorithm. The extrinsic information exchanging process is performed between the decoders and the previous w detectors at different consecutive time units. Simulation results show that the sliding-window IR-HARQ scheme for the SCMA system outperforms the original IR-HARQ scheme with a joint detection and decoding algorithm. The throughput of the SCMA system with the proposed IR-HARQ scheme is also improved.

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Section: Introductionmentioning

confidence: 99%