基于恒虚警的多卫星信号快速盲检测算法  

A Fast Blind Detection Algorithm Based on CFAR for Multiple Satellite Signals

作　　者：董蛟 徐慨[1] 杨海亮[1] DONG Jiao;XU Kai;YANG Hai-liang(Naval University of Engineering, Institute of Electrical Engineering, Wuhan 430033,China)

机构地区：[1]海军工程大学电子工程学院,湖北武汉430033

出　　处：《指挥控制与仿真》2016年第6期53-56,76,共5页Command Control & Simulation

基　　金：国家"863"计划(2014AA7026085)

摘　　要：在分析实际盲卫星通信信号的基础上,提出了一种对不重叠多卫星信号数量、中心频率进行实时估计的快速盲检测算法。算法基于恒虚警率准确地估计了噪声的统计特性进而设置了信噪分离的门限,并根据卫星通信信号的实际带宽特性实现了盲信号的检测。仿真结果表明,算法能够在较低的信噪比下实现对多卫星信号的快速准确盲检测,且与其他算法相比,该算法准确率高、通用性强,更能满足实际工程的需要。A fast blind detection algorithm of multiple satellite signals is proposed in this paper.The algorithm can easily obtain signals counts and carrier frequency in real time under certain signal to noise ratio. The algorithm estimates the statistical characteristic of the noise based on CFAR accurately and sets the threshold of signal-noise separation. It detects the blind signals successfully according to the actual bandwidth characteristics finally. The simulation results show that the algorithm can detect the blind signals quickly and accurately. Compared with other algorithms, it has high accuracy, strong commonality and can meet the needs of The actual project better.

关 键 词：快速盲检测 多卫星信号 恒虚警率 门限设定 信噪分离 

分 类 号：E917[军事] TN911.7[电子电信—通信与信息系统]