一种GSM无源探测系统中的空域DPI抑制算法  

A spatial DPI suppression algorithm for GSM-based passive detection system

作　　者：刘琦 李媛[2] 李明之[3] 

机构地区：[1]武警陕西总队通信站 [2]中国人民解放军94153部队 [3]中国人民解放军95172部队

出　　处：《现代电子技术》2014年第16期37-41,共5页Modern Electronics Technique

摘　　要：全球移动通信系统(GSM)无源探测系统中的强直达波干扰(DPI)抑制技术研究是当前一项艰巨而又极具挑战性的课题,已成为能否实现无源探测的关键。依据GSM信号下行链路导频信号的特点以及直达波的抑制要求,在空域采用了线性约束最小方差(LCMV)准则下的自适应波束形成与宽零陷相结合的空域抑制算法。理论分析和仿真结果均表明基于GSM的无源探测系统在此算法下可获得不低于55 dB的直达波干扰抑制。At present,the research of direct path interference （DPI） suppression technology in passive detection system based on global system for mobile communication（GSM）is difficult and challenging,which is directly related to the realization of the passive detection. According to the features of the GSM downlink pilot signal and the DPI suppression requirement,a spa-tial filtering algorithm based on the direction information and a least square null constraint optimization is proposed. Theoretical analysis and simulation results show that the GSM-based passive detection system can achieve DPI suppression at least 55 dB by using the proposed algorithm.

关 键 词：无源探测 全球移动通信系统 直达波抑制 空域滤波 

分 类 号：TN958-34[电子电信—信号与信息处理]