A Low Decoding Complexity Gallager Code with Turbo Architecture
一种低译码复杂度的Turbo架构LDPC码

Be aimed at lower complexity and RAM requirement of Low Density Parity Check(LDPC) decoder,a new class of concatenated codes called Parallel Interleaved Concatenated Gallager Code(PICGC),based on Turbo architecture and LDPC codes,is presented.In this paper,design,encoding and decoding algorithms of PICGC are studied.The RAM requirement for PICGC decoder is analyzed and compared to LDPC decoder,and an upper bound of memory-saving ratio is derived.The theoretical analysis and simulation results demonstrate that PICGC can reduce decoding complexity and RAM requirement significantly and maintain decoding delay with little sacrifice in performance in comparison to conventional LDPC codes.PICGC is an effective and feasible channel coding scheme.