DocumentCode :
1764332
Title :
Investigation on Full-Aperture Multichannel Azimuth Data Processing in TOPS
Author :
Pingping Huang ; Shenyang Li ; Wei Xu
Author_Institution :
Coll. of Inf. Eng., Inner Mongolia Univ. of Technol., Hohhot, China
Volume :
11
Issue :
4
fYear :
2014
fDate :
41730
Firstpage :
728
Lastpage :
732
Abstract :
The novel displaced phase center antenna (DPCA) azimuth multichannel technique is well suited to improve the coarser azimuth resolution of the terrain observation by progressive scans (TOPS) mode for a fixed total receive antenna length. However, both the azimuth multichannel nonuniform sampling and the aliased Doppler spectrum in TOPS raise the azimuth data processing difficulty. This letter proposes an innovative full-aperture processing approach, which adds an azimuth derotation step for each azimuth channel before azimuth multichannel data reconstruction and utilizes the prefiltering operation in the two-step focusing technique to resolve both azimuth ambiguity problems caused by the DPCA technique and azimuth beam progressive scanning. In addition to presenting the proposed azimuth preprocessing approach, the impact of the approach on the azimuth ambiguity-to-signal ratio is analyzed in detail. Simulation results validate the proposed multichannel processing approach for the TOPS mode.
Keywords :
Doppler radar; radar antennas; radar signal processing; synthetic aperture radar; DPCA technique; TOPS; aliased Doppler spectrum; azimuth derotation step; azimuth multichannel nonuniform sampling; azimuth multichannel technique; displaced phase center antenna; fixed total receive antenna length; full-aperture multichannel azimuth data processing; multichannel data reconstruction; terrain observation by progressive scans mode; Azimuth; Bandwidth; Doppler effect; Focusing; Remote sensing; Synthetic aperture radar; Aliasing; multichannel azimuth processing; synthetic aperture radar (SAR); terrain observation by progressive scans (TOPS);
fLanguage :
English
Journal_Title :
Geoscience and Remote Sensing Letters, IEEE
Publisher :
ieee
ISSN :
1545-598X
Type :
jour
DOI :
10.1109/LGRS.2013.2278183
Filename :
6670685
Link To Document :
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