DocumentCode :
1405844
Title :
Oversampling gain in adaptive normalised matched filter detector
Author :
Shi, Yan-Ling ; Shui, Peng-Lang ; Zhao, Yun-Bin
Author_Institution :
Nat. Lab. of Radar Signal Process., Xidian Univ., Xi´an, China
Volume :
5
Issue :
9
fYear :
2011
Firstpage :
987
Lastpage :
993
Abstract :
In radar target detection, the adaptive normalised matched filter (ANMF) detector is often used to detect moving targets in sea and land clutter environment. Its performance depends on estimation of clutter covariance matrix. The sample covariance matrix (SCM) estimator has been thoroughly analysed for independent and identically distributed Gaussian clutter vectors. Many radar systems on service use range-oversampling receivers. Referred to the range-oversampling model in the weather and oceanic radars, the spatial correlation model of range-oversampled clutter vectors is established, the error of the SCM estimator is analysed, and the range-oversampling gain, relevant to the oversampling factor and the receiver´s bandwidth, is derived. The experiments using raw radar clutter data are made to verify the range-oversampling gain, showing that the range oversampling improves the performance of the ANMF detector.
Keywords :
adaptive filters; correlation methods; covariance matrices; matched filters; meteorological radar; object detection; radar clutter; radar detection; radar imaging; adaptive normalised matched filter detector; clutter covariance matrix estimation; distributed Gaussian clutter vectors; land clutter environment; moving target detection; oceanic radars; oversampling factor; radar target detection; range-oversampled clutter vectors; range-oversampling gain; range-oversampling receivers; raw radar clutter data; sample covariance matrix estimation; sea clutter environment; spatial correlation model; weather radars;
fLanguage :
English
Journal_Title :
Radar, Sonar & Navigation, IET
Publisher :
iet
ISSN :
1751-8784
Type :
jour
DOI :
10.1049/iet-rsn.2010.0293
Filename :
6111413
Link To Document :
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