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.
出处
《电子科技大学学报》
EI
CAS
CSCD
北大核心
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)
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
two dimensional spread spectrum
two diliensional spread spectrum matrix
time synchronization
frequency synchronization
correlation matrix