A Multi-mode LDPC Decoder for IEEE 802.16e Mobile WiMAX

This paper describes a multi-mode LDPC decoder which supports 19 block lengths and 6 code rates of Quasi-Cyclic LDPC code for Mobile WiMAX system. To achieve an efficient implementation of 114operation modes, some design optimizations are considered including block-serial layered decoding scheme, a...

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Bibliographic Details
Published in:Journal of semiconductor technology and science 2012, 12(1), 45, pp.24-33
Main Authors: Shin, Kyung-Wook, Kim, Hae-Ju
Format: Article
Language:English
Subjects:
전기공학
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Summary:This paper describes a multi-mode LDPC decoder which supports 19 block lengths and 6 code rates of Quasi-Cyclic LDPC code for Mobile WiMAX system. To achieve an efficient implementation of 114operation modes, some design optimizations are considered including block-serial layered decoding scheme, a memory reduction technique based on the min-sum decoding algorithm and a novel method for generating the cyclic shift values of parity check matrix. From fixed-point simulations, decoding performance and optimal hardware parameters are analyzed. The designed LDPC decoder is verified by FPGA implementation, and synthesized with a 0.18-m CMOS cell library. It has 380,000 gates and 52,992 bits RAM, and the estimated throughput is about 164 ~ 222 Mbps at 56 MHz@1.8 V KCI Citation Count: 4
ISSN:1598-1657
2233-4866
DOI:10.5573/JSTS.2012.12.1.24