DocumentCode :
2781540
Title :
Low angle tracking using iterative multipath cancellation in sea surface environment
Author :
Ahn, Soyeon ; Yang, Eunjung ; Chun, Joohwan ; Kim, Jungtai
Author_Institution :
Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Daejeon, South Korea
fYear :
2010
fDate :
10-14 May 2010
Firstpage :
1156
Lastpage :
1160
Abstract :
In low angle tracking, signal reflection from sea surface leads to severe errors in the target angle of arrival (AOA) estimation owing to the presence of both a target and its image in the mainlobe. In this paper, we propose a new scheme that iteratively suppresses the specular reflected signal to alleviate estimation errors. The iterative processing, which includes estimating the target angle, calculating the reflected image angle and updating the null position in beamforming, is performed to eliminate the image signal; thus, the measured target AOA including error converges to the true value. Moreover, by exploiting phase comparison method using separate aperture, there is no need to consider the distortion of the monopulse slope caused by mainbeam nulling. Design examples are presented to explicitly ascertain the accuracy of the proposed technique in estimating the true target angle.
Keywords :
array signal processing; direction-of-arrival estimation; iterative methods; radar imaging; target tracking; angle of arrival estimation; beamforming; iterative multipath cancellation; iterative processing; low altitude target tracking; low angle tracking; mainbeam nulling; monopulse slope distortion; phase comparison method; sea surface environment; signal reflection; Array signal processing; Distortion measurement; Estimation error; Optical reflection; Performance evaluation; Position measurement; Sea measurements; Sea surface; Signal processing; Target tracking;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Radar Conference, 2010 IEEE
Conference_Location :
Washington, DC
ISSN :
1097-5659
Print_ISBN :
978-1-4244-5811-0
Type :
conf
DOI :
10.1109/RADAR.2010.5494445
Filename :
5494445
Link To Document :
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