长码直扩信号扩频序列估计  

The Spread Spectrum Code Estimation of Long-code DSSS Signal

作　　者：赵知劲[1] 李淼[1] 吴金沂 

机构地区：[1]杭州电子科技大学通信工程学院,浙江杭州310018

出　　处：《杭州电子科技大学学报（自然科学版）》2015年第2期1-4,共4页Journal of Hangzhou Dianzi University：Natural Sciences

摘　　要：针对扩频序列周期不为信息码宽整数倍的多用户周期长码直扩信号,提出一种基于平行因子的长码直扩信号扩频序列估计方法。将周期长码直扩信号建模为缺失的短码直扩信号模型,利用插补法和交替三线性分解(ATLD)迭代算法估计扩频序列,在此基础上利用直接三线性分解(DTLD)算法设置初始矩阵,大大提高了多用户周期长码直扩信号的扩频序列估计性能和速度。When the PN code period isn＆#39;t an integer multiple of the width of information code , the spread spectrum code estimation algorithm based on PARAFAC algorithm of long-code DSSS signal of multi-users is presented .Firstly the long-code DSSS signal is modeled as missing short-code DSSS signal .And then the imputation method and the alternating trilinear decomposition （ ATLD） algorithm are utilized to estimate the spread spectrum code of the long-code DSSS signal .Lastly the direct trilinear decomposition （ DTLD） algorithm is used to initialize the matrices .The performance and speed of the spread spectrum code estimation algorithm of the long-code DSSS signal of multi-users are greatly improved .

关 键 词：长码直扩 扩频序列 交替三线性分解 直接三线性分解 平行因子 

分 类 号：TN914.42[电子电信—通信与信息系统]