Performance Advantage of Non-binary LDPC Codes At High Code Rate under AWGN Channel

2006 ◽  
Author(s):  
Long Ma ◽  
Lin Wang ◽  
Jianwen Zhang
Keyword(s):  
Ldpc Codes ◽  
Code Rate ◽  
Awgn Channel ◽  
High Code Rate

scholarly journals A New Reliability Ratio Weighted Bit Flipping Algorithm for Decoding LDPC Codes

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Chakir Aqil ◽  
Ismail Akharraz ◽  
Abdelaziz Ahaitouf
Keyword(s):  
Gaussian Noise ◽  
Additive White Gaussian Noise ◽  
Ldpc Codes ◽  
Low Density ◽  
Parity Check ◽  
Coding Gain ◽  
Decoding Complexity ◽  
Low Density Parity Check ◽  
Awgn Channel ◽  
Infinite Loop

In this study, we propose a “New Reliability Ratio Weighted Bit Flipping” (NRRWBF) algorithm for Low-Density Parity-Check (LDPC) codes. This algorithm improves the “Reliability Ratio Weighted Bit Flipping” (RRWBF) algorithm by modifying the reliability ratio. It surpasses the RRWBF in performance, reaching a 0.6 dB coding gain at a Binary Error Rate (BER) of 10−4 over the Additive White Gaussian Noise (AWGN) channel, and presents a significant reduction in the decoding complexity. Furthermore, we improved NRRWBF using the sum of the syndromes as a criterion to avoid the infinite loop. This will enable the decoder to attain a more efficient and effective decoding performance.

Reduced decoding time of LDPC code using convolutional code with Vitrebi decoding in Underwater Communication

2018 ◽  
Vol 7 (2.25) ◽  
pp. 167
Author(s):  
Krishnamoorthy N.R ◽  
Ramadevi R ◽  
Marshiana M ◽  
Sujatha Kumaran
Keyword(s):  
No Value ◽  
Convolutional Code ◽  
Ldpc Code ◽  
Code Rate ◽  
Underwater Communication ◽  
Parity Check ◽  
Minimal Error ◽  
Ldpc Decoding ◽  
Low Density Parity Check ◽  
High Code Rate

Low Density Parity Check code is the more efficient technique to attain the minimal error rate in the underwater channel. To reduce the processing delay in the LDPC decoding, convolutional code with high code rate is used. The result showed that the BER of 10-4 can be obtained with Eb/No value of 20 for code rate of ½ and 12 for code rate of 1/8. It is also showed in result that the decoding time is reduced one-third for data size of 500 and one-tenth for the data size of 1500 bits.  

scholarly journals Error Floor Approximation for LDPC Codes in the AWGN Channel

2014 ◽  
Vol 60 (12) ◽  
pp. 7416-7441 ◽  
Author(s):  
Brian K. Butler ◽  
Paul H. Siegel
Keyword(s):  
Ldpc Codes ◽  
Error Floor ◽  
Awgn Channel
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