Reliability Variance based Weighted Bit Flipping Algorithms for LDPC

Harita, D; K, Parguna Rajan

doi:10.1109/confluence.2019.8776988

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…The second block is a channel encoder. Some intentional redundancy is added to the vector of the information symbols to increase reliability of the transmission via the noisy channel, which causes a rate reduction [22].…”

Section: -1-system Modelmentioning

confidence: 99%

Reliability Analysis of the Sum-Product Decoding Algorithm for the PSK Modulation Scheme

Jooshin¹,

Nangir²

2020

jist

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Iteratively decoding and reconstruction of encoded data has been considered in recent decades. Most of these iterative schemes are based on graphical codes. Messages are passed through space graphs to reach a reliable belief of the original data. This paper presents a performance analysis of the Low-Density Parity-Check (LDPC) code design method which approach the capacity of the Additive White Gaussian Noise (AWGN) model for communication channels. We investigate the reliability of the system under Phase Shift Keying (PSK) modulation. We study the effects and advantages of variation in the codeword length, the rate of parity-check matrix of the LDPC codes, and the number of iterations in the Sum-Product Algorithm (SPA). By employing an LDPC encoder prior to the PSK modulation block and the SPA in the decoding part, the Bit Error Rate (BER) performance of the PSK modulation system can improve significantly. The BER performance improvement of a point-to-point communication system is measured in different cases. Our analysis is capable for applying any other iterative message-passing algorithm. The code design process of the communication systems and parameter selection of the encoding and decoding algorithms are accomplished by considering hardware limitations in a communication system. Our results help to design and select paramours efficiently.

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Section: -1-system Modelmentioning

confidence: 99%

Reliability Analysis of the Sum-Product Decoding Algorithm for the PSK Modulation Scheme

Jooshin¹,

Nangir²

2020

jist

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“…(2) Reliability Variance Weighted Bit Flipping (RVWBF) Algorithms for LDPC [23]. The authors of this work used the variance of the values received.…”

Section: Introductionmentioning

confidence: 99%

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

Aqil

Akharraz

Ahaitouf

2021

Wireless Communications and Mobile Computing

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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.

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