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Noisy Gradient Descent Bit-Flipping Decoder Based on Adjustment Factor for LDPC Codes
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DOI：10.1109/LCOMM.2018.2824803.png)
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As a class of bit-flipping (BF) decoder, the noisy gradient descent bit flipping (NGDBF) algorithm outperforms the original GDBF and other BF algorithms. To increase the reliability of the inversion function, we propose a modified NGDBF algorithm by introducing an adjustment factor on the syndrome. Moreover, for the multi-bit flipping, we present an adaptive inversion threshold which depends on the numbers of negative bipolar syndromes. The simulation results show that our proposed algorithm outperforms the NGDBF algorithm for both single-bit and multi-bit flipping schemes.
Keyword:
LDPC codes
gradient descent bit flipping
multi-bit flipping
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4.4
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1.3W
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