Title :
Efficient Difference-based Decoding Implementations of LDPC Codes
Author :
Zhanji, Wu ; Mugen, Peng ; Wenbo, Wang ; Luying, Li
Author_Institution :
Wireless Signal Process. & Network Lab., Key Lab. of Universal Wireless Commun., Beijing
fDate :
5/1/2008 12:00:00 AM
Abstract :
Efficient implementations of the sum-product algorithm (SPA) for decoding low-density parity-check (LDPC) codes using difference-based messages between bit nodes and check nodes are presented. As for the updates of check nodes, reduced- complexity derivatives are also put forward. As compared with the traditional Log-Likelihood-Ratio(LLR)-based decoding implementations, the proposed method has much lower complexity and latency, while it has no obvious loss of the error performance.
Keywords :
decoding; parity check codes; LDPC codes; LLR-based decoding; bit nodes; check nodes; difference-based decoding; difference-based messages; log-likelihood-ratio; low-density parity-check codes; lower complexity; reduced-complexity derivatives; sum-product algorithm; AWGN; Additive white noise; Binary phase shift keying; Computational complexity; Decoding; Hardware; Parity check codes; Quantization; Sparse matrices; Sum product algorithm;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2008.072069
