A new method of broadband constant beamwidth beamforming for arbitrary geometry arrays

• 来源期刊: 声学学报（英文版）
• 学科: 物理学
• 年，卷（期）: 2001,（4）
• 页码范围: 327-333
• 页数: 7页
• 分类号: O4
• 语种: 英文

摘要

A new method of broadband constant beamwidth beamforming for arbitrary geometry arrays is proposed. In this method, the response vector of an arbitrary geometry array is expanded into 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 frequencies can be transformed to a reference frequency arid then the constant beamwidth beamforming vectors are ready to obtain. With these beamforming vectors, 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.