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Performance Improvement in High SNR for LDPC codes using Power Allocation  

Lee, Ki-Jun (홍익대학교 전자공학과)
Chung, Ha-Bong (홍익대학교 전자공학과)
Im, Ju-Hyuk (삼성전자 정보통신총괄 통신연구소)
Choi, Eun-A (한국전자통신연구원 통신위성 연구그룹)
Chang, Dae-Ig (한국전자통신연구원 통신위성 연구그룹)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.32, no.10C, 2007 , pp. 935-941 More about this Journal
Abstract
In this paper, we suggest the power allocation method which enhances the performance in high SNR for LDPC codes. In this method, bit power is unequally allocated proportionally to the difference of the degree distributions of variable and check nodes of Tanner graph between practically used codes and the codes optimized by density evolution. Simulation is performed to the codes in IEEE 802.16e standards, and the results show that the proposed method works well in high SNR.
Keywords
Power Allocation; Density Evolution; Low-Density Parity-Check(LDPC) Codes; IEEE802.16e Standard; Bit Reliability;
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