High-Throughput Multi-rate LDPC Decoder based on Architecture-Oriented Parity Check Matrices

Abstract

Conference PaperA high throughput pipelined LDPC decoder that supports multiple code rates and codeword sizes is proposed. In order to increase memory throughput, irregular block structured parity-check matrices are designed with the constraint of equally distributed odd and even nonzero block-columns in each horizontal layer for the pre-determined set of code rates. The designed decoder achieves a data throughput of more than 1 Gb/s without sacrificing the error-correcting performance of capacity-approaching irregular block codes. The architecture is prototyped on an FPGA and synthesized for an ASIC design flow