MSK直扩通信检测与符号周期估计分析  

Research on the detection and symbol period estimation of MSK DSSS communication

作　　者：董占奇[1] 刘明友[2] 

机构地区：[1]许昌学院电气信息工程学院,河南许昌461000 [2]防空兵指挥学院,郑州450052

出　　处：《华中师范大学学报（自然科学版）》2015年第1期38-41,共4页Journal of Central China Normal University：Natural Sciences

基　　金：河南省高等学校青年骨干教师资助计划项目(2010GGJS-214)

摘　　要：着眼MSK直扩通信的非协作检测问题,研究提出了一种基于接收信号自相关域分析处理的检测方法,该方法基于MSK直扩通信的基本原理,通过直接对频带信号进行自相关平方平滑及低通滤波获得能够反映MSK直扩通信存在与否的稳健峰值,并同时达成对于扩频系统扩频参数符号周期的估计,算法不需要对扩频系统载频进行前期估计,有效避免了非协作通信检测中在载波与相位估计及跟踪方面所存在的问题.计算机仿真显示,所述方法可操作性强,具有对于噪声环境下扩频信号检测的鲁棒性与适应性.Focusing on the non-cooperative detection of DSSS communication,the paper proposes a kind of MSK-modulated spread spectrum communication detection method.The method achieves the detection of the MSK DSSS communication and the estimation of the symbol period of the spread spectrum system by means of doing correlation,square smoothing and low pass filtering on the received band signal（or also radio-frequency signal）directly,through which a series of robust peaks can be gained.It does not need to do the preliminary estimation of carrier frequency of the spread spectrum system,and avoids the problem of the carrier extraction and phase tracking that exists in the non-cooperative detection of spread spectrum communication.The computer simulations show that the proposed method is not only feasible and efficient,but also can fit the need of the low signal to noise ratio which is quite common for the non-cooperative detection of the spread spectrum communication.

关 键 词：MSK直扩通信 频带处理 处理增益 符号周期 

分 类 号：TN911.23[电子电信—通信与信息系统]