无扩频矩阵知识二维扩频系统的盲同步  

Blind Synchronization of Two-Dimensional Spread Spectrum System without Knowledge of Spread Spectrum Matrix

作　　者：沈莹[1] 唐友喜[1] 

机构地区：[1]电子科技大学通信与信息工程学院,成都610054

出　　处：《电子科技大学学报》2006年第6期861-864,共4页Journal of University of Electronic Science and Technology of China

基　　金：国家自然科学基金资助项目(60272009;60390540-3);教育部博士点基金资助项目(20020614001)

摘　　要：针对加性白高斯噪声信道,考虑未知二维扩频矩阵的条件下,提出了一种二维扩频系统的时频同步方法。该方法利用二维扩频矩阵周期性重复的特点,先估计出频率偏差,再通过滑动暂存窗求相关矩阵最大特征值,完成信号的时间同步。计算机仿真结果验证了该方法的有效性。In Additive White Gaussian Noise （AWGN） channel, we introduce a method for synchronization of symbol timing and frequency for two-dimensional spread spectrum system without prior knowledge of spread spectrum matrix. Based on the periodical characteristic of the two-dimensional spread spectrum matrix, the method estimates the frequency offset, and then synchronizes the symbol timing by moving the position of data-storage window to calculate the maximum eigenvalue of correlation matrix. Computer simulations demonstrate the efficiency of this method.

关 键 词：二维扩频 二维扩频矩阵 盲同步 时间同步 频率同步 相关矩阵 

分 类 号：TN914.4[电子电信—通信与信息系统]