一种多频Wi-Fi外辐射源雷达综合处理方法  

A multiband Wi-Fi passive radar synthesis processing method

作　　者：饶云华[1] 纪赛飞 万显荣[1] 龚子平[1] 柯亨玉[1] RAO Yunhua;JI Saifei;WAN Xianrong;GONG Ziping;KE Hengyu(School of Electronic Information,Wuhan University,Wuhan 430072,China)

机构地区：[1]武汉大学电子信息学院,武汉430072

出　　处：《电波科学学报》2018年第5期509-518,共10页Chinese Journal of Radio Science

基　　金：国家自然科学基金(61271400);湖北省技术创新专项重大项目(2016AAA017);苏州市科技计划项目(SYG201620)

摘　　要：Wi-Fi信号可作为外辐射源进行近距离动目标探测,然而由于带宽限制,其距离分辨率常常难以达到实用的要求.文章探讨了多个不同信道Wi-Fi信号利用频谱搬移进行多信号合成以提高信号带宽的方法,针对实际应用中存在的信号间相位不一致及其对合成信号探测性能的影响进行了理论分析,并提出了补偿方法.采用计算机仿真对所提方法的性能进行了验证.所提方法不仅可提高距离分辨率,同时还提高了匹配滤波后的输出信噪比.The Wi-Fi signal can be used as an illuminators of opportunity for passive radar to detect moving targets at close range,but owing to its limited bandwidth,the range resolution is often difficult to meet the practical requirements.In this paper,a method is present to broaden signal bandwidth by using multiple different channels of Wi-Fi signals spectrum shifting,the phase inconsistency between signals in practical applications and its influence on the detection performance of synthetic signals are analyzed theoretically,and a compensation method is proposed.The proposed method can improve not only the range resolution,but also the output signal noise ratio after matched filtering.The performance of the proposed method is proven by computer simulations.

关 键 词：外辐射源雷达 WI-FI 带宽合成 模糊函数 相位补偿 

分 类 号：TN958.97[电子电信—信号与信息处理]