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- W4367623627 abstract "This paper considers the massive MIMO unsourced random access problem in a quasi-static Rayleigh fading setting. The proposed coding scheme is based on a concatenation of a conventional channel code (such as, e.g., LDPC) serving as an outer code, and a sparse regression code (SPARC) serving as an inner code. The scheme combines channel estimation, single-user decoding, and successive interference cancellation in a novel way. The receiver performs joint channel estimation and SPARC decoding via an instance of a bilinear generalized approximate message passing (BiGAMP) based algorithm, which leverages the intrinsic bilinear structure that arises in the considered communication regime. The detection step is followed by a per-user soft-input-soft-output (SISO) decoding of the outer channel code in combination with a successive interference cancellation (SIC) step. We show via numerical simulation that the resulting scheme achieves stat-of-the-art performance in the massive connectivity setting, while attaining comparatively low implementation complexity." @default.
- W4367623627 created "2023-05-02" @default.
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- W4367623627 date "2023-04-27" @default.
- W4367623627 modified "2023-09-23" @default.
- W4367623627 title "BiSPARCs for Unsourced Random Access in Massive MIMO" @default.
- W4367623627 doi "https://doi.org/10.48550/arxiv.2304.14546" @default.
- W4367623627 hasPublicationYear "2023" @default.
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