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- W4309757441 abstract "In this paper, we propose a novel state-space model to represent the behavior of sum-product algorithm (SPA) in the vicinity of a trapping set (TS) of a low-density parity-check (LDPC) code over the additive white Gaussian noise (AWGN) channel in the error floor region. The proposed model takes into account the non-linear behavior of SPA in the initial iterations using a quadratic approximation, and dynamically adjusts the operating point of the model in accordance to the statistical properties of TS messages. This is in contrast to the existing linear state-space models which linearly approximate the non-linear behavior of SPA at around the operating point of zero in all iterations. Simulation results are provided to demonstrate the higher accuracy of the proposed model in estimating the error floor of LDPC codes compared to the linear state-space model. We also make connections to the semi-analytical code-dependent technique proposed by Richardson for the error floor estimation of LDPC codes, and demonstrate that the proposed state-space model not only is a fully-analytical code-independent counterpart to that method, but also has less complexity and, in some cases, more accuracy." @default.
- W4309757441 created "2022-11-29" @default.
- W4309757441 creator A5004354664 @default.
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- W4309757441 date "2022-11-01" @default.
- W4309757441 modified "2023-09-27" @default.
- W4309757441 title "A Semi Linear State Space Model for Error Floor Estimation of LDPC Codes Over the AWGN Channel" @default.
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- W4309757441 doi "https://doi.org/10.1109/tcomm.2022.3212747" @default.
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