Simple rateless error-correcting codes for fading channels  

作　　者：BAI Bo BAI BaoMing MA Xiao 

机构地区：[1]State Key Laboratory of Integrated Services Networks, Xidian University Xi'an 710071, China [2]Department of Electronics and Communication Engineering, Sun Yat-sen University, Guangzhou 510275, China

出　　处：《Science China(Information Sciences)》2012年第10期2194-2206,共13页中国科学（信息科学）（英文版）

基　　金：supported jointly by National Natural Science Foundation of China (Grant Nos. 60972046,U0635003);National Science & Technology Major Special Project (Grant No. 2009ZX03003-011);Program for Changjiang Scholars and Innovative Research Team in University (Grant No. IRT0852)

摘　　要：This paper introduces a new class of rateless forward error correction （FEC） codes, which are called semi-random Kite （SR-Kite） codes. By introducing fixed patterns to an original purely random sparse parity-check matrix, the proposed code can lower down the error floors. We present a simulation-based greedy optimization algorithm to design the degree distribution of SR-Kite codes for independent Rayleigh fading channels. The performances of SR-Kite codes under maximum likelihood decoding are analyzed for both AWGN and independent Rayleigh fading channels via union bound. Both the analysis and simulation results show that the proposed codes perform well over AWGN and fading channels within a wide range of signal-to-noise-ratios. Moreover, we combine SR-Kite codes with high-order modulation schemes to obtain a continuously variable spectral efficiency in a large range of SNRs.This paper introduces a new class of rateless forward error correction （FEC） codes, which are called semi-random Kite （SR-Kite） codes. By introducing fixed patterns to an original purely random sparse parity-check matrix, the proposed code can lower down the error floors. We present a simulation-based greedy optimization algorithm to design the degree distribution of SR-Kite codes for independent Rayleigh fading channels. The performances of SR-Kite codes under maximum likelihood decoding are analyzed for both AWGN and independent Rayleigh fading channels via union bound. Both the analysis and simulation results show that the proposed codes perform well over AWGN and fading channels within a wide range of signal-to-noise-ratios. Moreover, we combine SR-Kite codes with high-order modulation schemes to obtain a continuously variable spectral efficiency in a large range of SNRs.

关 键 词：rateless coding LDPC codes RA codes union bound Rayleigh fading channels coded modulation 

分 类 号：TN911.22[电子电信—通信与信息系统] TN919[电子电信—信息与通信工程]