Cramer-Rao bound and signal-to-noise ratio gain in distributed coherent aperture radar  

作　　者：Peilin Sun Jun Tang Xiaowei Tang 

机构地区：[1]Department of Electronic Engineering, Tsinghua University

出　　处：《Journal of Systems Engineering and Electronics》2014年第2期217-225,共9页系统工程与电子技术（英文版）

基　　金：supported by the National Natural Science Foundation of China(61171120);the Key National Ministry Foundation of China(9140A07020212JW0101);the Foundation of Tsinghua University(20101081772);the Foundation of National Laboratory of Information Control Technology for Communication System of China;the Foundation of National Information Control Laboratory

摘　　要：This paper studies the estimation performance of the coherent processing parameter （CPP）, including time delay differences and phase synchronization errors among different apertures of the distributed coherent aperture radar （DCAR）. Firstly, three architectures of signal processing in the DCAR are introduced. Secondly, the closed-form Cramer-Rao bound （CRB） of the CPP estimation is derived and compared. Then, the closed-form CRB is verified by numerical simulations. Finally, when the next generation radar works in a fully coherent mode, the closed-form signal-to-noise ratio （SNR） gain of the three architectures is presented.This paper studies the estimation performance of the coherent processing parameter （CPP）, including time delay differences and phase synchronization errors among different apertures of the distributed coherent aperture radar （DCAR）. Firstly, three architectures of signal processing in the DCAR are introduced. Secondly, the closed-form Cramer-Rao bound （CRB） of the CPP estimation is derived and compared. Then, the closed-form CRB is verified by numerical simulations. Finally, when the next generation radar works in a fully coherent mode, the closed-form signal-to-noise ratio （SNR） gain of the three architectures is presented.

关 键 词：Cramer-Rao bound （CRB） joint parameter estimation distributed coherent aperture radar （DCAR）. 

分 类 号：TN958[电子电信—信号与信息处理] TN911.7[电子电信—信息与通信工程]