利用CDMA信号为照射源的雷达目标探测技术  

Radar target detection using CDMA signals as illuminators

作　　者：华树钢[1] 王俊[1] 

机构地区：[1]西安电子科技大学雷达信号处理国家重点实验室,陕西西安710071

出　　处：《系统工程与电子技术》2009年第2期337-341,共5页Systems Engineering and Electronics

基　　金：国家自然科学基金(60472087);国家重点实验室基金(9140C1008020705;9140A07040707DZ0132)资助课题

摘　　要：针对基于CDMA蜂窝网信号的外辐射源系统,提出一种利用多个基站发射的信号对运动目标检测的方案。该方案根据直达干扰分量的多普勒频移为零,而目标发射信号的多普勒频移非零以及基站信号序列自相关函数的特点,采用对消方法滤除各个基站多径分量的干扰;再根据基站之间除导频信道外其它信道可以认为是完全无关的这一特点,实现基站与回波时延的匹配,完成对定位参数的估计。通过仿真实验证明了该算法的有效性。A detection method for moving targets using sequences transmitted by multiple base stations （BS） in CDMA cellular networks is presented. Firstly, considering the facts that the Doppler shift of the inter- fering component is zero and the property of the autoeorrelation function of the signal sequence, the interfering component is filtered using the cascading cancellation. Secondly, based on the fact that all sequences except the pilot sequence are fully unrelated, the match between the BS and time delay is obtained. Finally, the effective- ness of the proposed method is verified by the simulation results.

关 键 词：干扰对消 匹配 波达时间 目标探测 

分 类 号：TN929.5[电子电信—通信与信息系统]