Proceedings of the Korean Institute of Information and Commucation Sciences Conference (한국정보통신학회:학술대회논문집)
- 2011.05a
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- Pages.132-135
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- 2011
A design of LDPC decoder supporting multiple block lengths and code rates of IEEE 802.11n
다중 블록길이와 부호율을 지원하는 IEEE 802.11n용 LDPC 복호기 설계
- Kim, Eun-Suk (School of Electronic Eng., Kumoh National Institute of Technology) ;
- Park, Hae-Won (School of Electronic Eng., Kumoh National Institute of Technology) ;
- Na, Young-Heon (Nextchip Co.,Ltd.) ;
- Shin, Kyung-Wook (School of Electronic Eng., Kumoh National Institute of Technology)
- Published : 2011.05.26
Abstract
This paper describes a multi-mode LDPC decoder which supports three block lengths(648, 1296, 1944) and four code rates(1/2, 2/3, 3/4, 5/6) of IEEE 802.11n WLAN standard. To minimize hardware complexity, it adopts a block-serial (partially parallel) architecture based on the layered decoding scheme. A novel memory reduction technique devised using the min-sum decoding algorithm reduces the size of check-node memory by 47% as compared to conventional method. The designed LDPC decoder is verified by FPGA implementation, and synthesized with a
본 논문에서는 IEEE 802.11n 무선 랜 표준의 3가지 블록길이(648, 1296, 1944)와 4가지 부호율(1/2, 2/3, 3/4, 5/6)을 지원하는 다중모드 LDPC 복호기를 설계하였다. 하드웨어 복잡도를 고려하여 layered 복호방식의 블록-시리얼(부분병렬) 구조로 설계하였으며, 최소합 알고리듬의 특징을 이용한 검사노드 메모리 최소화 방법을 고안하여 적용함으로써 기존방법에 비해 검사노드 메모리 용량을 약 47% 감소시켰다. 설계된 회로는 FPGA 구현을 통해 하드웨어 동작을 검증하였으며,