一种LDPC码混合迭代译码算法研究

摘要

根据LDPC码RRWBF算法和UMP BP-Based算法,提出一种混合迭代译码算法.该算法充分利用硬判决算法具有复杂度低和软判决算法性能好的优点,实现了在误码率性能没有下降的前提下,译码复杂度明显降低的效果,进而使传播时延得到减小.仿真结果表明,经过精心设计的不同迭代次数的MIA算法与性能相当的UMP BP-Based算法相比,译码复杂度降低28.5％.%A mixed iterative decoding algorithm is proposed based on RRWBF algorithm and UMP BP-Based algorithm of LDPC code. This algorithm makes full use of the hard decision algorithm complexity low and soft judgment algorithm performance good advantage, the BER performance is realized, no drop in the premise, decode complexity is decreased obviously effect and the propagation delay is decreased. Simulation results show that, after carefully designed different iterations, mixed iteration algorithm than UMP BP-Based algorithm, decode complexity decrease the 30%.