Efficient Difference-based Decoding Implementations of LDPC Codes
Zhanji Wu, Peng Mugen, Wang Wenbo, Luying Li · IEEE Communications Letters · 2008
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.