High throughput overlapped message passing for low density parity check codes

Yanni Chen; Keshab K. Parhi

doi:10.1142/9789812796769_0039

High throughput overlapped message passing for low density parity check codes

Yanni Chen, Keshab K. Parhi

Electrical and Computer Engineering

Research output: Contribution to journal › Conference article › peer-review

5 Scopus citations

Abstract

In this paper, a systematic approach is proposed to develop high throughput decoder for structured (quasi-cyclic) low density parity check (LDPC) block codes. Based on the properties of quasi-cyclic LDPC codes, the two stages of belief propagation decoding algorithm could be overlapped and thus the overall decoding latency is reduced. To avoid the memory access conflict, the maximum concurrency of the two stages is explored by a novel scheduling algorithm. Consequently, the decoding throughput could be increased by almost twice assuming dual-port memory is available.

Original language	English (US)
Pages (from-to)	245-248
Number of pages	4
Journal	Proceedings of the IEEE Great Lakes Symposium on VLSI
DOIs	https://doi.org/10.1142/9789812796769_0039
State	Published - 2003
Event	Proceedings of the 2003 ACM Great Lakes Symposium on VLSI - Washington, DC, United States Duration: Apr 28 2003 → Apr 29 2003

Keywords

High throughput
Low density parity check codes
Overlapped message passing

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10.1142/9789812796769_0039

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AB - In this paper, a systematic approach is proposed to develop high throughput decoder for structured (quasi-cyclic) low density parity check (LDPC) block codes. Based on the properties of quasi-cyclic LDPC codes, the two stages of belief propagation decoding algorithm could be overlapped and thus the overall decoding latency is reduced. To avoid the memory access conflict, the maximum concurrency of the two stages is explored by a novel scheduling algorithm. Consequently, the decoding throughput could be increased by almost twice assuming dual-port memory is available.

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High throughput overlapped message passing for low density parity check codes

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