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http://dx.doi.org/10.6109/jkiice.2011.15.4.921

A performance analysis of layered LDPC decoder for mobile WiMAX system  

Kim, Eun-Suk (금오공과대학교 전자공학부)
Kim, Hae-Ju (실리콘웍스(주))
Shin, Kyung-Wook (금오공과대학교 전자공학부)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.15, no.4, 2011 , pp. 921-929 More about this Journal
Abstract
This paper describes an analysis of the decoding performance and decoding convergence speed of layered LDPC(low-density parity-check) decoder for mobile WiMAX system, and the optimal design conditions for hardware implementation are searched. A fixed-point model of LDPC decoder, which is based on the min-sum algorithm and layered decoding scheme, is implemented and simulated using Matlab model. Through fixed-point simulations for the block lengths of 576, 1440, 2304 bits and the code rates of 1/2, 2/3A, 2/3B, 3/4A, 3/4B, 5/6 specified in the IEEE 802.16e standard, the effect of internal bit-width, block length and code rate on the decoding performance are analyzed. Simulation results show that fixed-point bit-width larger than 8 bits with integer part of 5 bits should be used for acceptable decoding performance.
Keywords
LDPC code; error correction code; layered decoding; IEEE 802.16e; WiMAX;
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Times Cited By KSCI : 1  (Citation Analysis)
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