两类DBL码的性能比较  

Comparison analysis between two kinds of DBL access codes

作　　者：姜晖[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：《北京航空航天大学学报》2008年第4期478-482,共5页Journal of Beijing University of Aeronautics and Astronautics

基　　金：国家自然科学基金资助项目(90604035)

摘　　要：设计出扩展的Large area Synchronization地址码(LS码)——Daoben Lab地址码(DBL码).DBL码由基本LS码与矩阵左、右直积生成,分别称为DBL左乘码和DBL右乘码,两类DBL码各有特点.DBL右乘码特点是把码字分组,码组间码字存在更大的零相关窗,增加了可用码字数,码组内码字非周期相关性与扩展矩阵行向量的相关性相同;DBL左乘码也是把码字分组,码组间的零相关窗长度不变,没有增加可用码字数,但当以正交矩阵扩展时,码组内有和原LS码同样长度的零相关窗.计算机仿真验证了两类DBL地址码的性质.A new class of generalized large area synchronization （LS） codes named daoben lab （DBL） access codes was presented. DBL access codes are generated from the left or right kronecker product of the LS codes and the extending matrix, and are called DBL left-product codes and DBL right-product codes, respectively. Two kinds of DBL access codes have their own features. The DBL right-product codes are divided into several groups such that the larger zero correlation window （ZCW） between two different code groups can be obtained and the number of available codes is increased. In addition, the aperiodic auto-correlation functions （ACF） and cross-correlation functions（CCF） of the codes within one group are determined by the extending matrix. The DBL left-product codes are also divided into several groups and the ZCW between two different code groups is same as that of LS code and the number of available codes is not increased, but the ZCW is equally as length as the former LS code used to do kronecker product with the orthogonal extending matrix within one group. Computer simulation has also validated the features of two kinds of DBL access codes.

关 键 词：零相关窗 LS码 DBL码 直积 

分 类 号：TN914.53[电子电信—通信与信息系统]