Space-Time Adaptive Processing with Vertical Frequency Diverse Array for Range-Ambiguous Clutter Suppression
Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review
Author(s)
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Detail(s)
Original language | English |
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Article number | 7475917 |
Pages (from-to) | 5352-5364 |
Journal / Publication | IEEE Transactions on Geoscience and Remote Sensing |
Volume | 54 |
Issue number | 9 |
Online published | 20 May 2016 |
Publication status | Published - Sep 2016 |
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Abstract
A high-pulse-repetition-frequency (PRF) radar can handle the high Doppler frequencies of clutter echoes received by a fast-moving airborne radar. However, high-PRF radar causes range ambiguity. In addition, the clutter is range dependent when the airborne radar works in a forward-looking geometry. The range ambiguity and range dependence will lead to severe performance degradation of the traditional space-time adaptive processing (STAP) methods. In this paper, a vertical frequency diverse array (FDA), which applies frequency diversity in the vertical of a planar array, is explored to circumvent the range ambiguity problem in STAP radar. A range-ambiguous clutter suppression approach is devised, which consists of vertical spatial frequency compensation and pre-STAP filtering. In the vertical-FDA radar, the vertical spatial frequency depends not only on the depression angle but also on the slant range. By using this characteristic, the range-ambiguous clutter can be separated in the vertical spatial frequency domain, and then, clutter suppression is achieved for each separated range region. As a result, both problems of range ambiguity and range dependence are solved. Simulation results are provided to demonstrate the effectiveness of the proposed method.
Research Area(s)
- Forward-looking airborne radar, high pulse-repetition frequency, range-ambiguous clutter suppression, space-time adaptive processing (STAP), vertical frequency diverse array
Citation Format(s)
Space-Time Adaptive Processing with Vertical Frequency Diverse Array for Range-Ambiguous Clutter Suppression. / Xu, Jingwei; Liao, Guisheng; So, Hing Cheung.
In: IEEE Transactions on Geoscience and Remote Sensing, Vol. 54, No. 9, 7475917, 09.2016, p. 5352-5364.Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review