非正交多载波直扩系统的DBL地址码设计  

On the DBL Code Design for Non Orthogonal Multi-Carrier DS Systems

作　　者：莫勇[1] 刘栋[1] 李道本[1] 

机构地区：[1]北京邮电大学信息工程学院,北京100876

出　　处：《北京邮电大学学报》2007年第5期46-50,共5页Journal of Beijing University of Posts and Telecommunications

基　　金：国家自然科学基金项目(90604035)

摘　　要：为研究非正交多载波系统中DBL地址码字的构造,分析了在特定非正交多载波间隔下LS/DBL地址码的相关特性,给出了非正交多载波下码字数与载波间隔的关系以及DBL地址码扩展矩阵的选取准则,以保持DBL码原有的零相关窗特性.仿真结果表明,该构造出的DBL码在非正交多载波下检测复杂度只随载波数线性增长而性能不受影响.To design Dao Ben labs（DBL） code for non orthogonal multi-carrier direct spread（DS） systems, the LS/DBL code correlation is deduced under certain condition, and the relation between frequency gap and number of codes is discussed. Meanwhile, some rules are given for DBL expanding matrix selection to reserve the zero correlation window（ZCW） property. Simulation shows that the DBL code constructed by this way will suffer no performance loss under non orthogonal multi-carrier systems while the decoding complexity grows linearly with the number of subcarriers.

关 键 词：DBL码 零相关窗 非正交多载波 

分 类 号：TN929.53[电子电信—通信与信息系统]