摘要
提出了一种任意结构阵列宽带恒定束宽波束形成的新方法．该方法把任意结构阵列的响应向量表示成以Ｂｅｓｓｅｌ函数为核函数的级数之和，并将高阶项截断，然后把频带内各个频率点上的阵列响应向量转化到参考频率上，从而得到恒定束宽波束形成向量，使得各个频率上的波束和参考波束相同．同时，本文还给出了一种基于自适应处理的参考波束优化方法．结合均匀分布离散国阵所作的计算机仿真验证了本文所提方法的有效性．
A new method of broadband constant beamwidth beamforming for arbitrary geometry arrays is proposed in this paper. In the method, the response vector of arbitrary geometry array is expanded in the form of sum of an infinite series, whose core function is. the first kind Bessel function. The high terms of this series are truncated so that the array response vectors at different frequency components were transformed to the reference frequency and the constant beamwidth beamforming vectors are ready to obtain. With these beamforming vectors, the beams at different frequencies are same as the reference beam. A reference beam optimizing method based on adaptive processing is also proposed to optimize the reference beam of arbitrary geometry arrays. Computer simulation for a uniform circular array verified the effectiveness of the new method proposed in this paper.
出处
《声学学报》
EI
CSCD
北大核心
2001年第1期55-58,共4页
Acta Acustica
基金
国家自然科学基金资助项目!(69802010)
