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- W2922404724 abstract "For the problem of multiple users simultaneously communicating with a single receiver, a sparse multiple access scheme is proposed. Each user employs a low-density parity-check (LDPC) code. To mitigate multi-user interference, the codeword of each user is randomly punctured and the punctured bits are replaced by idle slots. That is, only a small random set of users are active at each time. The restriction of number of concurrent users significantly reduces the multi-user decoding complexity. Moreover, this puncture facilitates an efficient message-passing decoding over a sparse graph. With a joint optimization of the degree distribution of the LDPC code and the column weight distribution of the puncture matrix, capacity-approaching performance is achieved." @default.
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- W2922404724 date "2018-10-01" @default.
- W2922404724 modified "2023-09-26" @default.
- W2922404724 title "Sparse Multiple Access and Code Design with Near Channel Capacity Performance" @default.
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- W2922404724 doi "https://doi.org/10.23919/isita.2018.8664311" @default.
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