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一种M-ary扩频信号的盲同步方法
解辉,马俊涛,姚智刚,吕萌,史林
0
((陆军工程大学石家庄校区 电子与光学工程系,石家庄 050003))
摘要:
针对通信侦察领域M-ary扩频信号的盲同步问题,根据M-ary扩频信号的结构特点及扩频码集元素间的相关特性,提出了一种扩频码长度和失步时间联合估计方法。该方法能够同时估计出M-ary扩频信号的扩频码长度及失步时间,且不受扩频码集类型的限制。仿真实验表明,该算法能在较低的信噪比条件下对三种不同码集的扩频信号进行估计,且算法的性能随着所使用数据的增多而提高。
关键词:  M-ary扩频信号  盲同步  扩频码长  失步时间
DOI:
基金项目:国防科技基金资助项目(2004022)
A blind synchronization method for M-ary spread spectrum signals
XIE Hui,MA Juntao,YAO Zhigang,LYU Meng,SHI Lin
((Department of Electronic and Optics Engineering,Army Engineering University Shijiazhuang Campus,Shijiazhuang 050003,China))
Abstract:
In order to solve the problem of blind synchronization of M-ary spread spectrum signals in the field of communication reconnaissance,a joint estimation method of spread spectrum code length and out-of-step time is proposed according to the structural characteristics of M-ary spread spectrum signal and the correlation characteristics of spread spectrum code set elements.This method can estimate the spread spectrum code length and out-of-step time of M-ary spread spectrum signal simultaneously,and it is not limited by the type of spread spectrum code set.Simulation results show that the algorithm can estimate the spread spectrum signals of three different code sets under the condition of low signal-to-noise ratio(SNR),and the performance of the algorithm improves with the increase of the data used.
Key words:  M-ary spread spectrum signal  blind synchronization  spread spectrum code length  out-of-step time
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