恒定束宽波束形成器的设计和仿真研究
DESIGN AND SIMULATION OF BEAMFORMER WITH CONSTANT BEAMWIDTH
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摘要: 宽带恒定束宽波束形成器是基阵信号处理中的难点。本文提出一种基于均匀一致性旁瓣级的设计方法,在求出宽带信号实现恒定束宽所须的频率响应后,通过一组FIR滤波器来拟合该频率响应。该方法不仅能用于一般的等间隔直线阵,而且当阵元存在指向性且位置不精确时,也能较好地实现恒定束宽。计算机仿真表明了该方法的可行性。
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关键词:
- 波束形成; 恒定束宽; FIR滤波器
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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