一种改进的DSSS通信信号盲检测方法研究  

An Improved Blind Detection Method for DSSS Communication Signal

作　　者：郭微光 陈恺 王鹏程 朱荣 GUO Wei-guang;CHEN Kai;WANG Peng-cheng;ZHU Rong(Navy Staff,Beijing 100841,China)

机构地区：[1]海军参谋部,北京100841

出　　处：《通信技术》2018年第7期1548-1552,共5页Communications Technology

摘　　要：直接序列扩频信号具有隐蔽性和抗干扰性等特点,已经被广泛用于民用和军事通信系统中,对DSSS信号盲检测具有重要作用。因此,结合DSSS信号模型及其特点,提出了一种改进的DSSS通信信号盲检测方法,能够在低信噪比条件下正确实现检测。具体地,通过对相关峰搜索过程进行优化,引入自适应判决门限计算思路,具有良好的稳健性。此外,分析多径信道中的检测思路,扩展应用范围。仿真结果表明,新方法的检测性能较过去的方法更优,抗噪性好,且工程适用性较强。Direct Sequence Spread Spectrum(DSSS)signal,which has the characteristics of concealment and anti-interference,has been widely used in civil and military communication systems,and plays an important role in the blind detection of DSSS signals.In this paper,based on the DSSS signal model and its characteristics,an improved blind detection method for DSSS communication signal is proposed,which can be detected correctly under low signal to noise ratio.The main idea is to optimize the search process of the correlation peaks,and introduce adaptive decision threshold calculation method,which has good robustness.On the other hand,we also analyze the detection idea in multipath channel and extend the application scope.The simulation results show that the new method has better detection performance,better noise immunity and stronger engineering applicability than previous methods.

关 键 词：DSSS信号 盲检测 相关峰搜索 自适应门限 

分 类 号：TN918.91[电子电信—通信与信息系统]