恒定束寬波束形成器的設計和仿真研究
DESIGN AND SIMULATION OF BEAMFORMER WITH CONSTANT BEAMWIDTH
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摘要: 寬帶恒定束寬波束形成器是基陣信號處理中的難點。本文提出一種基于均勻一致性旁瓣級的設計方法,在求出寬帶信號實現(xiàn)恒定束寬所須的頻率響應后,通過一組FIR濾波器來擬合該頻率響應。該方法不僅能用于一般的等間隔直線陣,而且當陣元存在指向性且位置不精確時,也能較好地實現(xiàn)恒定束寬。計算機仿真表明了該方法的可行性。
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關鍵詞:
- 波束形成; 恒定束寬; FIR濾波器
Abstract: Wideband beamforming with constant beamwidth is one of the key problems in array signal processing. In this paper, a method based on uniform sidelobe is given. And the frequency response needed to realize constant beamwidth for subband components of the signal is computed and filter with FIR filters. This method is suitable for uniform linear array, and is also effective when the element has its own pattern or when its location is inaccurate. Computer simulation shows the feasibility of this method. -
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