BICM在DS/CDMA中的应用  

The Application of BICM for the DS/CDMA System

作　　者：牛凯[1] 吴伟陵[1] 高路[1] 杨红燕[1] 

机构地区：[1]北京邮电大学信息工程学院,北京100876

出　　处：《电子学报》2000年第z1期53-56,共4页Acta Electronica Sinica

基　　金：国家自然科学基金重大项目!(No .698962 4 3)

摘　　要：本文提出了在双正交序列集上构造比特交织编码调制 (BICM)的新方案 ,推导了其误比特率上界 .这一方法将凿孔卷积编码、多相调制、交织和扩频有机结合为一个整体 .理论分析与计算机仿真证明该方案在Rayleigh信道下比传统的编码调制方法有 2 4dB的性能改善 .并且在快衰落信道下 ,该方案能提供很高的分集数 .总之 ,它非常适合应用于第三代移动通信体制中的多码传输 .A novel scheme constructing BICM(Bit-Interleaved Coded Modulation) on the dual-orthogonal sequences set was proposed in this paper.We derived the upper limit bound of the BER(Bit Error Rate) about the new approach.The method allows an efficient combination of punctured convolutional codes ,multiphase modulation ,interleaving and spreading spectrum.It is verified that the proposed system is superior to the conventional error-coding schemes by approximately 2-4dB over a Rayleigh channel according to the theoretic analysis and computer simulation.In addtion,the paper shows that such scheme can provide high diversity order in the fast fading channel.Generally speaking,this scheme is very appropriate to the multi-code transmission in the 3G mobile telecommunications systems.

关 键 词：比特交织编码调制 格码调制 多级码 GRAY映射 

分 类 号：TN-55[电子电信]