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- W4313259293 abstract "Unsourced multiple access (UMA) is the technology for massive, low-power, and uncoordinated Internet-of-Things in the 6G wireless system, improving connectivity and energy efficiency on guaranteed reliability. The multi-user coding scheme design is a critical problem for UMA. This paper proposes a UMA coding scheme based on the T-Fold IRSA (irregular repetition slotted Aloha) paradigm by using joint Intra/inter-slot code design and optimization. Our scheme adopts interleave-division multiple access (IDMA) to enhance the intra-slot coding gain and the low-complexity joint intra/inter-slot SIC (successive interference cancellation) decoder structure to recover multi-user payloads. Based on the error event decomposition and density evolution analysis, we build a joint intra/inter-slot coding parameter optimization algorithm to minimize the SNR (signal-to-noise ratio) requirement at an expected system packet loss rate. Numerical results indicate that the proposed scheme achieves energy efficiency gain by balancing the intra/inter-slot coding gain while maintaining relatively low implementation complexity." @default.
- W4313259293 created "2023-01-06" @default.
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- W4313259293 date "2022-12-26" @default.
- W4313259293 modified "2023-10-14" @default.
- W4313259293 title "Joint Intra/Inter-Slot Code Design for Unsourced Multiple Access in 6G Internet of Things" @default.
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- W4313259293 doi "https://doi.org/10.3390/s23010242" @default.
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