Approximate Cramer-Rao bound on Doppler error in correlation-processing relatively narrowband noise radar

作     者：Meller, M. 

作者机构：Telecommun Res Inst Gdansk Div Dept Signal & Informat Proc PL-80502 Gdansk Poland 

出 版 物：《IET RADAR SONAR AND NAVIGATION》 (IET Radar Sonar Navig.)

年 卷 期：2009年第3卷第3期

页      面：245-252页

核心收录：

学科分类：0810[工学-信息与通信工程] 0808[工学-电气工程] 08[工学] 

基　　金：National Center for Research and Development [PBZ-MNiSW-DBO-04/I/2007] 

主　　题：DOPPLER effect SOUND waves RADIO noise RADAR DETECTORS ELECTRONIC systems 

摘      要：Limitations on accuracy of Doppler estimation in continuous-wave noise radar with correlation processing are studied. Second-order properties of output of the correlation receiver are evaluated and an approximate Cramer-Rao bound on errors of Doppler measurement is derived. The accuracy of Doppler measurements is found to be affected by the following factors: power spectral density of noise signal, frequency response of the low-pass filter in correlator, observation time, velocity of the target and signal to noise ratio. It is shown that the random nature of the transmitted signal induces additional fluctuations at the output of correlator which limit the accuracy even in the infinite signal to noise case. Qualitative extension of the results to a case covering multiple targets and clutter is made. It is argued that the performance will decrease and that increasing transmitted power may not provide significant improvement when clutter is present.