Two-dimensional direction finding for low altitude target based on intensity measurement using an acoustic vector-sensor

• 来源期刊: 声学学报（英文版）
• 年，卷（期）: 2004,（3）
• 页码范围: 278-288
• 页数: 11页
• 语种: 英文

摘要

A method of two-dimensional direction of arrival (DOA) estimation for low altitude target, which is based on intensity measurement using a three-dimensional differential pressure acoustic vector-sensor, is presented. With the perfect characteristics of acoustic vector sensor in the low frequency band, accurate DOA estimation is achieved under small array size. The validity of the proposed method was assessed by experiments on the noise signals radiated by a helicopter. The influence of acoustic sensor size, integral time and signal to noise ratio to the accuracy of DOA estimation were investigated, respectively. The performance comparisons demonstrated that it outperformed the traditional time-delay measurement based method for a small acoustic array.