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BER Performance Comparison of Bit Flipping Algorithms used for Decoding of LDPC Codes

G Pavithra, M Naveen Kumar

Published Jan 6, 2015• 0 citations
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BER Performance Comparison of Bit Flipping Algorithms used for Decoding of LDPC Codes

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Bit-flipping decoding algorithm and its improved version weighted bit-flipping decoding algorithm are usually used to realize the hard-decision decoding of LDPC codes.But the performance of BF decoding algorithm is not good enough,and WBF decoding algorithm is complicated.A revised hard-decision decoding of LDPC codes to have a good tradeoff between complexity and decoding performance is introduced in this paper.The algorithm can make multiple bits flip in the first two iteration.The simulation results demonstrate the revised algorithm supplies a slightly inferior BER performance,but a significant reduction of the complexity.

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Reliability Ratio Based Weighted Bit-Flipping Decoding for LDPC codes

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In this contribution, a novel reliability-ratio based weighted bit-flipping (RRWBF) algorithm is proposed for decoding low density parity check (LDPC) codes. The RRWBF algorithm proposed is benchmarked against the conventional weighted bit-flipping (WBF) algorithm and the improved weighted bit-flipping (IWBF) algorithm. More than 1 and 2 dB coding gain was achieved at a BER of 10/sup -5/ while invoking the RRWBF algorithm in comparison to the two benchmarking schemes, when communicating over an AWGN and an uncorrelated Rayleigh channel, respectively. Furthermore, the decoding complexity of the proposed RRWBF algorithm is maintained at the same level as that of the conventional WBF algorithm.

IEEE Vehicular Technology Conference•Dec 10, 2005•15 citations
Bit-flipping decoding algorithm and its improved version weighted bit-flipping decoding algorithm are usually used to realize the hard-decision decoding of LDPC codes.But the performance of BF decoding algorithm is not good enough,and WBF decoding algorithm is complicated.A revised hard-decision decoding of LDPC codes to have a good tradeoff between complexity and decoding performance is introduced in this paper.The algorithm can make multiple bits flip in the first two iteration.The simulation results demonstrate the revised algorithm supplies a slightly inferior BER performance,but a significant reduction of the complexity.
In this contribution, a novel reliability-ratio based weighted bit-flipping (RRWBF) algorithm is proposed for decoding low density parity check (LDPC) codes. The RRWBF algorithm proposed is benchmarked against the conventional weighted bit-flipping (WBF) algorithm and the improved weighted bit-flipping (IWBF) algorithm. More than 1 and 2 dB coding gain was achieved at a BER of 10/sup -5/ while invoking the RRWBF algorithm in comparison to the two benchmarking schemes, when communicating over an AWGN and an uncorrelated Rayleigh channel, respectively. Furthermore, the decoding complexity of the proposed RRWBF algorithm is maintained at the same level as that of the conventional WBF algorithm.