A Reduced-Complexity Architecture for LDPC Layered Decoding Schemes

作者：Kim Sangmin^*; Sobelman Gerald E; Lee Hanho

来源：IEEE Transactions on Very Large Scale Integration Systems, 2011, 19(6): 1099-1103.

DOI：10.1109/TVLSI.2010.2043965

• Decoding
• field-programmable gate array (FPGA)
• forward error correction
• low density parity check (LDPC)

A reduced-complexity low density parity check (LDPC) layered decoding architecture is proposed using an offset permutation scheme in the switch networks. This method requires only one shuffle network, rather than the two shuffle networks which are used in conventional designs. In addition, we use a block parallel decoding scheme by suitably mapping between required memory banks and processing units in order to increase the decoding throughput. The proposed architecture is realized for a 672-bit, rate-1/2 irregular LDPC code on a Xilinx Virtex-4 FPGA device. The design achieves an information throughput of 822 Mb/s at a clock speed of 335 MHz with a maximum of 8 iterations.

• 出版日期2011-6