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.
|Original language||English (US)|
|Number of pages||5|
|Journal||IEEE Transactions on Very Large Scale Integration (VLSI) Systems|
|State||Published - Jun 2011|
Bibliographical noteFunding Information:
Manuscript received August 15, 2009; revised November 18, 2009. First published March 29, 2010; current version published May 25, 2011. This work was supported in part by the Electronics and Telecommunications Research Institute (ETRI).
- field-programmable gate array (FPGA)
- forward error correction
- low density parity check (LDPC)