時(shí)變級(jí)聯(lián)濾波器的兩種設(shè)計(jì)方法
TWO APPROACHES TO THE DESIGN OF TINE-VARYING CASCADED FILTERS
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摘要: 本文針對(duì)雷達(dá)雜波抑制中常用的時(shí)變級(jí)聯(lián)濾波器,提出了兩種實(shí)用的設(shè)計(jì)方法。第一種方法通過時(shí)變級(jí)聯(lián)濾波器與時(shí)變非級(jí)聯(lián)濾波器的等效來設(shè)計(jì)時(shí)變級(jí)聯(lián)濾波器。該方法可以使時(shí)變級(jí)聯(lián)濾波器具有最佳雜波濾波器的效果。第二種方法通過對(duì)總的等效濾波器的設(shè)計(jì)來得到級(jí)聯(lián)濾波器第二級(jí)的權(quán)系數(shù)。分析表明,時(shí)變級(jí)聯(lián)濾波器第二級(jí)的頻率響應(yīng)很難寫出,但可以通過總的等效頻率響應(yīng)來體現(xiàn)。
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關(guān)鍵詞:
- 時(shí)變?yōu)V波器; 雜波抑制; 雷達(dá)信號(hào)處理
Abstract: Two approaches to the design of the time-varying cascaded filters used in radar clutter rejection are presented. In the first approach, by fitting the cascaded filter to the noncascaded filter, the time-varying cascaded filter can be designed, which makes it possible that the time-varying cascaded filter behaves just like an optimum clutter filter. The second approach can be used to design the second-stage filter in a time-varying cascaded one by setting zeros in its equivalent overall frequency response. It has been shown that the frequency response of the second-stage filter in the time-varying cascaded filter is difficult to express, however, is convenient to be involved in the overall response. -
Hsiao J K. IEEE Trans. on AES, 1974, AES-10(5): 622-629.[2]Wu Huan, Zhang Shouhong, Bao Zheng. Adaptive Cascaded Clutter Canceler for Staggered PRF Radar. Proceedings of the 1991 CIE Internationai Conference on Radar. Beijing: 503-506. -
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