Build-in wiretap channel I with feedback and LDPC codes by soft decision decoding

2017 ◽  
Vol 11 (11) ◽  
pp. 1808-1814 ◽  
Author(s):  
Gaoyuan Zhang ◽  
Hong Wen ◽  
Jiexin Pu ◽  
Jie Tang
Keyword(s):  
Ldpc Codes ◽  
Soft Decision ◽  
Wiretap Channel ◽  
Soft Decision Decoding

scholarly journals A Simple Scheme for Belief Propagation Decoding of BCH and RS Codes in Multimedia Transmissions

2008 ◽  
Vol 2008 ◽  
pp. 1-12 ◽  
Author(s):  
Marco Baldi ◽  
Franco Chiaraluce
Keyword(s):  
Belief Propagation ◽  
Ldpc Codes ◽  
Block Codes ◽  
Soft Decision ◽  
Linear Block Codes ◽  
Rs Codes ◽  
Nonbinary Codes ◽  
Soft Decision Decoding ◽  
Multimedia Transmissions ◽  
A New Technique

Classic linear block codes, like Bose-Chaudhuri-Hocquenghem (BCH) and Reed-Solomon (RS) codes, are widely used in multimedia transmissions, but their soft-decision decoding still represents an open issue. Among the several approaches proposed for this purpose, an important role is played by the iterative belief propagation principle, whose application to low-density parity-check (LDPC) codes permits to approach the channel capacity. In this paper, we elaborate a new technique for decoding classic binary and nonbinary codes through the belief propagation algorithm. We focus on RS codes included in the recent CDMA2000 standard, and compare the proposed technique with the adaptive belief propagation approach, that is able to ensure very good performance but with higher complexity. Moreover, we consider the case of long BCH codes included in the DVB-S2 standard, for which we show that the usage of “pure” LDPC codes would provide better performance.

Loop Detection Based on Bit-Flipping Decoding Algorithm for LDPC Codes

2011 ◽  
Vol 271-273 ◽  
pp. 452-457
Author(s):  
Zhong Xun Wang ◽  
Fang Qiang Zhu ◽  
Li Liu ◽  
Juan Wang
Keyword(s):  
Additive White Gaussian Noise ◽  
Ldpc Codes ◽  
Soft Decision ◽  
Decoding Algorithm ◽  
Excellent Performance ◽  
Detection Mechanism ◽  
Decoding Algorithms ◽  
Loop Detection ◽  
Soft Decision Decoding ◽  
Parity Check Codes

In this paper, we introduce a new bit-flipping decoding algorithm for low-density parity-check codes based on loop detection mechanism, which is an extension to soft-decision decoding. This decoding algorithm's performance has been significantly improved by introducing a loop detection mechanism for the failed flipping bit and leading into the soft-decision about the reliability measure of the received symbols. Theoretical analysis shows that the complexity of this algorithm is lower. Some simulation results are given, which show that compared with other known kinds of bit-flipping decoding algorithms for LDPC codes, this new decoding on the additive white Gaussian noise channel offer excellent performance.

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