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| Wind Speed Estimation for Low-attitude Windshear Based on Space-time Adaptive Processing |
| Wu Ren-biao Zhang Biao Li Hai Lu Xiao-guang Han Yan-fei |
| (Tianjin Key Lab for Advanced Signal Processing, Civil Aviation University of China, Tianjin 300300, China) |
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Abstract When detecting low-attitude windshear with airborne weather radar, the real signals are usually covered with strong clutter. In this paper, a novel method of low-attitude windshear speed estimation based on Space-Time Adaptive Processing (STAP) is proposed to solve the above problem. The proposed method handles the range-dependence of clutter of airborne forward looking array with space-time interpretation theory to achieve the Independent and Identically Distributed (IID) samples used in the clutter covariance matrix estimation; then the space-time adaptive processor is constructed which is applicable to a distributed low-attitude windshear target to suppress clutter and accumulate windshear signal; finally the accurate estimation of wind speed is got. The experimental results show that the proposed method can achieve a superior clutter suppression performance and an accurate wind speed estimation in high clutter-to-noise ratio and low signal-to-noise ratio.
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Received: 27 May 2014
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Corresponding Authors:
Wu Ren-biao
E-mail: rbwu@cauc.edu.cn
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2015, Vol. 37 
