多门限联合的卫星信号自动检测方法  

Automatic Detection of Satellite Signal Using Multiple Thresholds

作　　者：刘沛[1,2] 纪学军[1] 赵国庆[2] LIU Pei JI Xuejun ZHAO Guoqing(The 54th Research Institute of CETC, Shijiazhuang Hebei 050081, China College of Electronic Engineering, Xidian University, Xi＇an Shaanxi 710071, China)

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081 [2]西安电子科技大学电子工程学院,陕西西安710071

出　　处：《无线电通信技术》2016年第6期17-20,62,共5页Radio Communications Technology

基　　金：国家自然科学基金项目(81370038)

摘　　要：针对检测门限设置对信号检测性能影响较大的问题,提出一种新的宽频带接收条件下卫星信号检测方法。对卫星通信信号功率谱具有的特征进行分析,并利用经验模式分解(EMD)对功率谱进行平滑,在此基础上,将信号检测由多个门限联合实现。该方法弱化单一检测门限对检测结果的影响,检测门限的设置由数据驱动,计算复杂度适中。基于卫星实测数据的信号检测结果验证了该方法的有效性。For the problem that the inappropriate detection threshold influences the performance of signal detection,a new method is proposed for detection of satellite signal within wide frequency bandwidth. The characteristics of the power spectrum of satellite communication signal is analyzed and the power spectrum is smoothed by using the idea of Empirical Mode Decomposition （EMD）, based on which the signal detection is accomplished by multiplethresholds. The proposed method not only alleviates the detection performance deterioration introduced by inappropriate single detection threshold, but also has moderate computational complexity. Moreover,the multiple detection thresholds are data-driven.Experimental results based on the real satellite signal data validate the proposed detection method.

关 键 词：信号检测 经验模式分解 多门限检测 

分 类 号：TN911.3[电子电信—通信与信息系统]