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- W2787641783 abstract "Absorbing sets (ASs) cause the error floor phenomenon in many Low-Density Parity-Check (LDPC) codes. A recent, simplified system model for Min-Sum (MS) LDPC decoding [1] predicts that ASs exhibit a threshold behavior: if all variable nodes in an AS have channel messages above the threshold, the AS cannot trap the decoder. The threshold is a real-valued parameter that depends on the topology of the AS, and can be evaluated by a nonlinear optimization. In this paper we describe a simple, fast algorithm for evaluating the AS threshold. Additionally, we show that the algorithm is valid also for scaled-MS decoding. We show with an example that the threshold values under scaled-MS decoding are smaller than under MS decoding. Accordingly, scaling decreases the error floor." @default.
- W2787641783 created "2018-02-23" @default.
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- W2787641783 date "2017-11-01" @default.
- W2787641783 modified "2023-09-27" @default.
- W2787641783 title "Analysis of practical LDPC decoders in tanner graphs with absorbing sets" @default.
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- W2787641783 doi "https://doi.org/10.1109/itw.2017.8277973" @default.
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