GSM无源探测中基于空域宽零陷的DPI抑制新算法  

A Novel Spatial Broad Nulling Algorithm for DPI Suppression in GSM-based Passive Detection Systems

作　　者：王畅[1] 李媛[2] 毛留俊[2] 郭建新[2] 

机构地区：[1]华北水利水电学院信息工程学院,郑州450011 [2]空军工程大学电讯工程学院,西安710077

出　　处：《电讯技术》2012年第7期1120-1124,共5页Telecommunication Engineering

基　　金：陕西省自然科学基金资助项目(SJ08F11;2009JQ8020)~~

摘　　要：强直达波干扰(DPI)抑制是GSM无源探测系统中的首要问题。根据系统中DPI与目标回波的特征差异,提出了一种新的宽零陷空域DPI抑制算法。该算法基于干扰和回波的DOA信息,采用改进的最小约束最小方差准则来实现特定方位上的空域滤波,能够在对目标回波进行波束赋形的同时有效抑制DPI。仿真结果表明,该算法能获得不低于55 dB的抑制增益。The major problem in GSM - based passive detection systems is how to suppress the strong direct path interference（DPI） effectively. According to the feature differences between the DPI and echo signals, a novel spatial broad nulling algorithm is presented for DPI cancellation. With the help of the Direction of Arrival （DOA） information, broad and deep spatial filtering based on the linear constraint minimum variance（LCMV） criterion can be implemented in the DPI direction. Simulation results show that at least 55 dB suppression gains can be achieved by using the proposed algorithm.

关 键 词：GSM 无源探测 直达波干扰 空域滤波 

分 类 号：TN970[电子电信—信号与信息处理]