宽带干扰信号的数字相关检测与时差估计  

Digital Correlation Detection and TDOA Estimation of Broadband Jamming Signal

作　　者：黄桂根[1] 李品[1] 丁坚[1] 

机构地区：[1]南京电子技术研究所,南京210039

出　　处：《现代雷达》2015年第5期21-24,64,共5页Modern Radar

摘　　要：宽带(压制式)干扰是雷达面临的严重威胁之一,实现对干扰源的精确定位与跟踪是多站无源时差定位系统的重要任务。针对宽带(压制式)干扰的检测与时差测量,文中基于数字互相关原理,设计了宽带干扰信号的数字互相关检测和时差估计的系统处理流程;在完成数学建模的基础上,对宽带干扰信号的数字互相关检测性能进行了完备的理论分析和数学推导,得出了对工程设计有重要参考价值的结论;并给出了指定信噪比和干扰带宽情况下,时差估计精度的克拉美罗下界(CRLB)。Monte-Carlo仿真验证了结论的正确性。Broadband (suppression) jam is one of the most strictness threat against radar, and locating & tracking of jamming emit- ters is the important mission of the multi-station passive TDOA locating system. In the thesis, based on digital correlation principle, the block diagram of digital correlation detection and TDOA estimation system is designed, focus on broadband jamming. Completely theoretical analysis and mathematical derivation of digital correlation detection performance of broadband jam are implemented, and then, the conclusion obtained is valuable for engineering design. The CRLB of TDOA estimation precision is given out, appointed SNR and the jamming band width. The correctness of the conclusion is validated by monte-carlo computer simulation.

关 键 词：宽带(压制式)干扰 无源时差定位 数字相关检测 到达时间差 

分 类 号：TN974[电子电信—信号与信息处理]