DocumentCode :
1464283
Title :
Bistatic clutter analysis and range ambiguity resolving for space time adaptive processing
Author :
Meng, Xi ; Wang, Tao ; Wu, Junyong ; Bao, Zhen
Author_Institution :
Nat. Key Lab. of Radar Signal Process., Xidian Univ., Xi´an, China
Volume :
3
Issue :
5
fYear :
2009
Firstpage :
502
Lastpage :
511
Abstract :
The clutter characteristics of bistatic airborne radar are more complex than those of monostatic airborne radar. The clutter spectra not only vary severely with range, but also vary with bistatic configuration. The problem of range dependence is more serious in monostatic airborne radar. In this paper, the geometry of arbitrary bistatic airborne radar configuration is firstly analysed, and a formula for Doppler frequency calculation with the variables of azimuth angle and bistatic range is deduced, which is an efficient tool for bistatic clutter analysis. Because of the severe clutter range dependence, the processing of compensation is indispensable in space time adaptive processing (STAP). However, when range ambiguity occurs, the compensation is difficult to be applied to each clutter range cell. To solve this problem, a range ambiguity resolving approach is further proposed by utilising azimuth elements in phased array. Because this approach will result in spatial degrees of freedom (DOF) loss, the overlapped subarray processing is introduced in order obtain enough spatial DOF for STAP. By doing so, the compensation for mitigating range dependence can be applied effectively to bistatic clutter.
Keywords :
Doppler radar; airborne radar; geometry; phased array radar; radar clutter; radar signal processing; space-time adaptive processing; Doppler frequency calculation; STAP; azimuth angle; bistatic airborne radar; compensation; geometry; monostatic airborne radar; overlapped subarray processing; phased array; radar clutter analysis; range ambiguity resolving approach; range dependence; space time adaptive processing;
fLanguage :
English
Journal_Title :
Radar, Sonar & Navigation, IET
Publisher :
iet
ISSN :
1751-8784
Type :
jour
DOI :
10.1049/iet-rsn.2008.0184
Filename :
5260397
Link To Document :
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