A Memory Efficient Partially Parallel Decoder Architecture for Quasi-Cyclic LDPC Codes
Zhongfeng Wang, Zhiqiang Cui · IEEE Transactions on Very Large Scale Integration (VLSI) Systems · 2007
This paper presents a memory efficient partially parallel decoder architecture suited for high rate quasi-cyclic low-density parity-check (QC-LDPC) codes using (modified) min-sum algorithm for decoding. In general, over 30% of memory can be saved over conventional partially parallel decoder architectures. Efficient techniques have been developed to reduce the computation delay of the node processing units and to minimize hardware overhead for parallel processing. The proposed decoder architecture can linearly increase the decoding throughput with a small percentage of extra hardware. Consequently, it facilitates the applications of LDPC codes in area/power sensitive high-speed communication systems