寬帶方位估計(jì)的波束域Root-MUSIC算法
Beam-space Root-MUSIC for direction finding of wide-band sources
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摘要: 高分辨算法的實(shí)現(xiàn)是一個(gè)受到普遍重視的問(wèn)題。為降低運(yùn)算量,提高估計(jì)性能,便于工程應(yīng)用,該文深入研究寬帶波束域Root-MUSIC算法,根據(jù)波束域處理的空間濾波特性,將被束域求根多項(xiàng)式的根劃分在不同的區(qū)域,從而基于子陣分解對(duì)求根多項(xiàng)式進(jìn)行降階處理,仿真實(shí)驗(yàn)討論了不同波束形成矩陣的估計(jì)性能,證明了降階處理的可行性。
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關(guān)鍵詞:
- 寬帶; 方位估計(jì); 波束域; 高分辨
Abstract: The realization of high resolution algorithm has been paid more attention in recent years. This paper gives the model of wide-band beam-space direction finding problem and studies the Root-MUSIC algorithm. The roots in the unit circle of the beam-space Root-MUSIC are divided into two parts, one is corresponding to the true direction, and the other is not related to the source direction. Sub-array model is used here to form beams to focus the root corresponding to the true direction in a reduced order polynomial. This process reduced the computation burden. Simulation results in various beams have shown that the beams with wider main-band and lower side-band have better estimation and resolution performance, and proved the effectiveness of the wide-band beam-space reduced order Root-MUSIC. -
智婉君,李志舜,空間重采樣法恒定束寬波束形成器設(shè)計(jì),信號(hào)處理,1998,Vo1.14,增刊,1-5.[2]D.Rao, K. V. S. Hari, Performance analysis of Root-Music, IEEE Trans. on ASSP., 1989, 37(12),1939-1949.[3]Ta-Sung Lee, Efficient wide-band source localization using beamforming invariance technique,IEEE Trans. on SP, 1994, 42(6), 1376-1387. -
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