Improved noisy gradient descent bit-flipping algorithm over Rayleigh fading channel

Gradient descent bit flipping (GDBF) and its many variants have offered remarkable improvements over legacy, or modified, bit flipping decoding techniques in case of decoding low density parity check (LDPC) codes. GDBF method and its many variants, such as noisy gradient descent bit flipping (NGDBF)...

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Veröffentlicht in:International journal of electrical and computer engineering (Malacca, Malacca) Jg. 12; H. 3; S. 2699
Hauptverfasser: Biazaran, Reza, Helgert, Hermann Joseph
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Yogyakarta IAES Institute of Advanced Engineering and Science 01.06.2022
Schlagworte:
Algorithms
Channels
Codes
Decoders
Decoding
Error correcting codes
Fading
Random noise
ISSN:2088-8708, 2722-2578, 2088-8708
Online-Zugang:Volltext
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Zusammenfassung:Gradient descent bit flipping (GDBF) and its many variants have offered remarkable improvements over legacy, or modified, bit flipping decoding techniques in case of decoding low density parity check (LDPC) codes. GDBF method and its many variants, such as noisy gradient descent bit flipping (NGDBF) have been extensively studied and their performances have been assessed over multiple channels such as binary symmetric channel (BSC), binary erasure channel (BEC) and additive white Gaussian noise (AWGN) channel. However, performance of the said decoders in more realistic channels or channel conditions have not been equally studied. An improved noisy gradient descent bit flipping algorithm is proposed in this paper that optimally decodes LDPC encoded codewords over Rayleigh fading channel and under various fade rates. Comparing to NGDBF method, our proposed decoder provides substantial improvements in both error performance of the code, and in the number of iterations required to achieve the said error performance. It subsequently reduces the end-to-end latency in applications with low or ultra-low latency requirements.
Bibliographie:ObjectType-Article-1
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ISSN:2088-8708
2722-2578
2088-8708
DOI:10.11591/ijece.v12i3.pp2699-2710