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Computer Science > Information Theory

arXiv:1504.06025 (cs)
[Submitted on 23 Apr 2015]

Title:XJ-BP: Express Journey Belief Propagation Decoding for Polar Codes

Authors:Jingwei Xu, Tiben Che, Gwan Choi
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Abstract:This paper presents a novel propagation (BP) based decoding algorithm for polar codes. The proposed algorithm facilitates belief propagation by utilizing the specific constituent codes that exist in the factor graph, which results in an express journey (XJ) for belief information to propagate in each decoding iteration. In addition, this XJ-BP decoder employs a novel round-trip message passing scheduling method for the increased efficiency. The proposed method simplifies min-sum (MS) BP decoder by 40.6%. Along with the round-trip scheduling, the XJ-BP algorithm reduces the computational complexity of MS BP decoding by 90.4%; this enables an energy-efficient hardware implementation of BP decoding in practice.
Comments: submitted to GLOBECOMM 2015
Subjects: Information Theory (cs.IT)
Cite as: arXiv:1504.06025 [cs.IT]
  (or arXiv:1504.06025v1 [cs.IT] for this version)
  https://doi.org/10.48550/arXiv.1504.06025

Submission history

From: Jingwei Xu [view email]
[v1] Thu, 23 Apr 2015 02:04:55 UTC (435 KB)
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