非高斯雜波譜模型下的MTI性能分析
MTI PERFORMANCE ANALYSIS IN NON-GAUSSIAN CLUTTER ENVIRONMENTS
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摘要: 該文主要討論了在非高斯型的立方及平方型雜波功率譜環(huán)境下雷達(dá)系統(tǒng)的MTI性能,給出了MTI濾波器平均改善因子的上限。表明在譜寬相同時(shí),立方及平方型雜波譜下的MTI性能遠(yuǎn)劣于高斯型。對(duì)各種雜波譜下的譜寬等效性引入了L2(R)上雜波譜均方根帶寬的度量,它較客觀地反映了分布型雜波譜的總體平均寬度。最后,給出了MTI濾波器對(duì)雜波譜寬失配情況下改善因子的損失曲線,顯示在立方和平方雜波譜下,性能損失對(duì)失配極不敏感。
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關(guān)鍵詞:
- Barlow雜波模型; Fishbein雜波模型; MTI; 改善因子; 均方根帶寬
Abstract: The MTI performance in non-Gaussian type clutter such as cubic and square clutter PSD (Power Spectrum Density) environments is analyzed. The up limit curves of the average improvement factor are given. Results show that the MTI performance in cubic or square PSD condition is much poor than in Gaussian. A measure for the clutter bandwidth is proposed in L2(R) space, which is more objective for evaluating the equivalence among the bandwidth of these three clutter PSDs. Finally, the curves of MTI performance degradation versus the MTI filter mismatch are presented, which shows that the performance degradation is insensitive to the mismatch only in cubic and square clutter PSD conditions. -
W. Fishbein, et al., Clutter attenuation analysis, Technique Report No. ECOM-2808, AD665352 Mar, 1967.[2]J.L. Eaves, E. K. Reedy, Principles of Modern Radar, New York, Van Nostrand Reinhold Company, 1987, Chap 10 ［3］J.K. Hsiao. On the optimization of MTI clutter rejection, IEEE. Trans. on AES, 1974, AES-10(5),622-629,[3]D. Curtis Schleher, MTI and Pulsed Doppler Radar, Boston, London, Artech House Inc. 1991,Chap.4 ［5］陳建春,耿富錄,運(yùn)動(dòng)雜波自適應(yīng)抑制技術(shù),西安電子科技大學(xué)學(xué)報(bào),1999,26(2),174-177[4]S. Haykin, et al., Maximum-entropy spectral analysis of radar clutter, Proc. IEEE, 1982 70(9),953-962. -
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