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| Clutter Cancellation for Airborne Passive Radar Based on RDNLMS |
| YANG Pengcheng①②③ LÜ Xiaode①② LIU Yu①②③ CHAI Zhihai①②③ ZHANG Dan①②③ |
①(Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China)
②(National Key Laboratory of Science and Technology on Microwave Imaging, Beijing 100190, China)
③(University of Chinese Academy of Sciences, Beijing 100049, China) |
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Abstract RDNLMS algorithm is used to cancel Doppler-spreading direct signal and strong echo of airborne passive radar. The transfer function of RDNLMS filter is deduced, based on which a method of non-uniform Doppler extraction is developed to decrease the computing load while minimizing performance loss. With this method, the Doppler of strong echo will be surely extracted hence strong echo will be cancelled efficiently. In addition, the interval of extracted Doppler will not be too large to offer proper suppression for weak echo. Simulations show that when the order of RDNLMS filter is fixed, the performance of non-uniform Doppler extraction will be 2.4 dB better than the uniform one.
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Received: 25 November 2015
Published: 26 August 2016
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Corresponding Authors:
YANG Pengcheng
E-mail: yang_peng_cheng@126.com
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