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Erschienen in: Wireless Personal Communications 1/2017

22.04.2017

Improved Belief Propagation Decoding Algorithm for Short Polar Codes

verfasst von: Shajeel Iqbal, Adnan Ahmed Hashmi, GoangSeog Choi

Erschienen in: Wireless Personal Communications | Ausgabe 1/2017

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Abstract

In this paper, we discuss the belief propagation (BP) decoding of polar codes. The performance of polar codes for short lengths is not satisfactory. Therefore, motivated by this we propose a novel technique to improve the performance of polar codes under BP decoding. In order to enhance the reliability of the variable nodes’ propagated messages in BP decoding, the messages are multiplied by previous messages of variable nodes. It is also shown that the BP decoding can be performed on polar codes if the factor graph is constructed according to the parity check matrix of polar codes. Simulation results in binary-input additive white Gaussian noise channel show that using the proposed method a gain of 1–2 dB can be achieved. We also show that the complexity of proposed decoder is same as the complexity of standard BP decoder. Furthermore, we show that the proposed decoder requires about 10–25 iterations less than the standard BP decoder.

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Metadaten
Titel
Improved Belief Propagation Decoding Algorithm for Short Polar Codes
verfasst von
Shajeel Iqbal
Adnan Ahmed Hashmi
GoangSeog Choi
Publikationsdatum
22.04.2017
Verlag
Springer US
Erschienen in
Wireless Personal Communications / Ausgabe 1/2017
Print ISSN: 0929-6212
Elektronische ISSN: 1572-834X
DOI
https://doi.org/10.1007/s11277-017-4249-5

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