星型16QAM调制LDPC-BICM-ID系统的星座映射设计  

Design of labeling map methods for bit-interleaved LDPC-coded star 16QAM-modulation system

作　　者：黄天聪[1] 王炜[1] 徐琳[1] 吴玉成[1] 

机构地区：[1]重庆大学通信工程学院,重庆400044

出　　处：《计算机应用研究》2012年第11期4273-4275,共3页Application Research of Computers

基　　金：国家自然科学基金资助项目(60872038)

摘　　要：针对比特交织编码调制—迭代检测系统中应用星型16进制正交幅度(16QAM)调制不存在Gray映射的问题,结合欧氏平方重量最大化原则和最小判决区域最大化原则,提出一种适合于此系统星座映射的新规则,设计新规则下的星型16QAM星座映射图,通过分析和计算机仿真,比较了各种星型16QAM星座映射性能。仿真结果表明,根据新规则设计的星型16QAM星座映射好于其他星座映射,在误码率达到10-6时,使用设计的映射方式使得系统性能有2.2 dB的增益。Labeling map is crucial for bit-interleaved coded modulation with iterative decoding（BICM-ID） system.Star-16QAM modulation was used widely in mobile communication system,and it had no existence of Gray mapping.In order to maximize the Euclidean square and minimum decision region for bit-interleaved LDPC-coded star-16QAM modulation with itera-tively decoding system,this paper proposed a new signal labeling designed criterion.It designed a new star-16QAM signal labeling based on the proposed method.It compared with different labelings through analysis and computer simulation.Simulation results show that based on the new designed signal labeling,the system achieves a gain of approximately 2.2 dB in comparison to others at a bit ratio of 10-6.

关 键 词：通信技术 低密度奇偶校验编码 正交幅度调制 比特交织编码调制 星座映射 

分 类 号：TN911.22[电子电信—通信与信息系统]