機(jī)載雷達(dá)的預(yù)濾波直接數(shù)據(jù)域算法
Direct data domain stap algorithm for airborne radar applications
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摘要: 空時(shí)自適應(yīng)處理(STAP)作為一種地雜波環(huán)境下機(jī)載雷達(dá)自適應(yīng)檢測小目標(biāo)的方法已得到廣泛研究,干擾非一致性是當(dāng)前的一個(gè)重要方面。由雜波脊外的強(qiáng)干擾(或目標(biāo))引起的分立非一致性是市區(qū)和尖峰狀雜波環(huán)境下STAP性能下降的主要原因。利用級聯(lián)算法得到的自適應(yīng)權(quán)可用于STAP干擾的分立非一致性問題。該方法由一個(gè)直接數(shù)據(jù)域算法和一個(gè)統(tǒng)計(jì)自適應(yīng)算法級聯(lián)構(gòu)成。該文提出一種帶雜波衰減預(yù)濾波器的直接數(shù)據(jù)域算法來增強(qiáng)算法對分立非一致干擾的抑制,從而提高了STAP對付分立非一致干擾的性能。
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關(guān)鍵詞:
- 非一致干擾; STAP; 預(yù)濾波器; 直接數(shù)據(jù)域算法
Abstract: STAP has been widely studied for airborne radar as an approach to adaptively detect small target competing with ground clutter. Non-homogeneous interference is currently an important aspect of STAP. The discrete non-homogenates due to strong interference or target separating from clutter ridge account for much of the degradation in urban and spiky clutter scenarios. The use of adaptive weights with the hybrid algorithm is widely application to discrete non-homogeneity problems, which is a hybridization of a two-dimensional non-statistical method with statistically based methods. This paper further considers a new direct data domain processor with a prefilter attenuating clutter to strengthen suppression for discrete non-homogeneous interference. By that, the desirable performance of STAP to discrete non-homogeneous interference is observed. -
R.S. Adve, M. C. Wicks, T. B. Hale, P. Antonik, Ground moving target indication using knowledge based space time adaptive processing, Proc. of the 2000 IEEE Int. Radar Conf., Alexandria,May 2000, 735-740.[2]W.L. Melvin, M. C. Wicks, Improving practical space-time adaptive radar, Proc. of the 1997IEEE National Radar Conf., Syracuse, May 1997, 48-53.[3]R.S. Adve, T. B. Hale, M. C. Wicks, A two stage hybrid space-time adaptive processing algorithm,Proc. of the 1999 IEEE Radar Conf., Boston, April 1999, 279-284.[4]B.C. Armstrong, H. D. Griffiths, C. J. Baker, R. G. White, Performance of adaptive optimal Doppler processors in heterogeneous clutter, IEE Proc.-F, 1995, 142(4), 179-190.[5]保錚,張玉洪,廖桂生,王永良,吳仁彪,機(jī)載雷達(dá)空時(shí)二維信號處理,現(xiàn)代雷達(dá),1994,16(1),38-48,16(2)17-27. -
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