Low complexity method for spreading sequence estimation of DSSS signal in non-cooperative communication systems  

作　　者：Chang Liang Wang Fuping Wang Zanji 

机构地区：[1]Dept. of Electrical Engineering, Tsinghua Univ., Beijing 100084, P. R. China

出　　处：《Journal of Systems Engineering and Electronics》2009年第1期41-49,共9页系统工程与电子技术（英文版）

基　　金：supported by the Specialized Research Fund for the Doctoral Program of Higher Education (20060003032)

摘　　要：It is a necessary step to estimate the spreading sequence of direct sequence spread spectrum （DSSS） signal for blind despreading and demodulation in non-cooperative communications. Two innovative and effective detection statistics are proposed to implement the synchronization and spreading sequence estimation procedure. The proposed algorithm also has a low computational complexity with only linear additions and modifications. Theoretical analysis and simulation results show that the algorithm performs quite well in low SNR environment, and is much better than all the existing typical algorithms with a comprehensive consideration both in performance and computational complexity.It is a necessary step to estimate the spreading sequence of direct sequence spread spectrum （DSSS） signal for blind despreading and demodulation in non-cooperative communications. Two innovative and effective detection statistics are proposed to implement the synchronization and spreading sequence estimation procedure. The proposed algorithm also has a low computational complexity with only linear additions and modifications. Theoretical analysis and simulation results show that the algorithm performs quite well in low SNR environment, and is much better than all the existing typical algorithms with a comprehensive consideration both in performance and computational complexity.

关 键 词：direct sequence spread spectrum detection statistic low complexity. 

分 类 号：TN911.23[电子电信—通信与信息系统] TN914.42[电子电信—信息与通信工程]