摘要
针对扩频导航系统面临的窄带干扰问题,提出了基于频域幅值处理(Frequency Amplitude Domain Processing,FADP)技术的抗干扰方法,并把该方法应用在扩频导航接收机中,提高导航系统的抗干扰能力。FADP是根据统计判决理论,利用局部最优检测思想得到了一个非线性函数,通过这个非线性函数对干扰进行抑制。把FADP应用在常规平方和伪码捕获结构中,能够根据非高斯干扰的统计特性来消除干扰以提高扩频系统信噪比。仿真结果表明,该抗干扰处理结构能够自适应地有效抑制扩频导航接收机中的窄带干扰,提高扩频系统的检测性能。
The main objective of this paper is to describe and simulate the application of an interference canceling technique named Frequency Domain Amplitude Processing(FADP)in navigation and improve anti-jamming capability of the navigation system.FADP means use of the local optimal detection ideas to obtain a nonlinear function on the basis of statistical theory,and the interference is restrained through the nonlinear function.FADP is applied to the conventional square code acquisition structure,and it can eliminate interferences to improve the signal to noise ratio of the spread-spectrum system according to the statistical characteristics of the non-gauss interferences.Simulation results show that the proposed anti-interference structure can adaptively suppress the narrow band interference and improve the detection performance of spread-spectrum navigation system.
作者
杜丹
王凯
赵彦雷
DU Dan;WANG Kai;ZHAO Yanlei(The 1st Military Representative Office of PLA Army Equipment Department in Shijiazhuang,Shijiazhuang 050081,China;Unit 32382,PLA,Beijing 100072,China;The 54th Research Institute of CETC,Shijiazhuang 050081,China)
出处
《无线电工程》
北大核心
2021年第3期205-211,共7页
Radio Engineering
基金
国家自然科学基金资助项目(91638203)。
关键词
频域幅值处理
局部最佳检测
扩频系统
抗干扰技术
检测概率
FADP
locally optimum detection
spread-spectrum system
anti-interference
detection probability