摘要
文章研究了近场情况下的波束形成问题。对于任意结构阵列,提出了近场波束形成的一种约束最小平方和法,用近场信号模型来设计近场波束。该方法借助于优化工具箱,在对波束旁瓣施加约束的条件下,使波束主瓣的误差平方和最小。该方法在主瓣区域和旁瓣区域都能得到满足设计要求的波束性能,可以方便地控制期望响应,简单易行。基于32元均匀离散圆阵的仿真设计结果表明了文中方法的有效性。
A constrained least-square method for near field beamforming is presented. The method uses a near field signal model to design the beamformer and can be used for arbitrary geometry arrays. In the design procedure, sum of the square error in the mainlobe regions is made minimal while the sidelobe regions of the beam pattern are constrained. The desired design specifications can be obtained both in the mainlobe and sidelobes, and the implementation of the method is simple. Results of simulation for a 32-element uniform circular array verify the effectiveness of the method.
出处
《声学技术》
CSCD
北大核心
2006年第2期140-144,共5页
Technical Acoustics
关键词
近场
波束形成
任意结构阵列
近场信号模型
arbitrary geometry arrays
near field beamforming
near field signal model
