Efficient Concatenated Same Codebook Construction for the Random Access Gaussian MAC

In this paper, a low complexity scheme for unsourced random multiple access over the Gaussian channel is proposed. Following the literature by the word "unsourced" we mean the fact that the users use the same codebook codes. The proposed scheme is based on T-fold ALOHA with successive inte...

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Bibliographic Details
Published in:IEEE Vehicular Technology Conference pp. 1 - 5
Main Authors: Ustinova, Daria, Glebov, Anton, Rybin, Pavel, Frolov, Alexey
Format: Conference Proceeding
Language:English
Published: IEEE 01.09.2019
Subjects:
Binary codes
Encoding
Iterative algorithms
Iterative decoding
Maximum likelihood decoding
ISSN:2577-2465
Online Access:Get full text
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Summary:In this paper, a low complexity scheme for unsourced random multiple access over the Gaussian channel is proposed. Following the literature by the word "unsourced" we mean the fact that the users use the same codebook codes. The proposed scheme is based on T-fold ALOHA with successive interference cancellation (SIC) procedure. In each slot, the same codebook concatenated code construction with outer non-binary (NB) low- density parity-check (LDPC) code and inner linear binary code is decoded with iterative joint decoding algorithm. Outer NB-LDPC code is decoded with low-complexity iterative q-ary sum-product algorithm (QSPA) and short inner binary code is decoded with maximum likelihood. Finally, the numerical results and comparison with theoretical bounds are represented.
ISSN:2577-2465
DOI:10.1109/VTCFall.2019.8891568