关键词: 迭代译码, 内存优化, 减时延处理, 高效实现

Abstract: The iterative receivers perform an outstanding reliable transmission at very low signal-to-noise ratio.However，the practical implementation of these is a very challenging topic，partly due to memory intensive.The approach of sliding window is used to reduce memory and delay.Applied the independent recursive nature of iterative decoding，this paper devotes an optimized arrangement scheme：the real-time release and update are proposed to reduce the memory consumption to 50%，the design of the computation for LLR without waiting is considered for reducing the delay to 33%，and there are still two backward recursion for remaining high performance.Simulation results support all above in the end.

Key words: iterative decoding, memory optimization, delay-reduced, high-efficient realization