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| Beam-space Root-MUSIC for direction finding of wide-band sources |
| Zhi Wanjun; Yan Shenggang; Li Zhishun |
| College of Marine Engineering Northwestern Polytechnical University Xi an 710072 China |
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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.
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Received: 03 July 2000
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2002, Vol. 24 
