Estimating Phase Difference and Lead of Discrete Cosine Ultrasonic Wave Signals Based on Hilbert Transform and Lissajous Figure Features

摘要：

It is required to measure the phase difference and lead of two trains of cosine ultrasonic wave (CSUW) in underwater positioning with a super short base line (SSBL)based on a sound beacon. This paper presents an improved method to estimate the phase difference based on Hilbert transform, and does an effective one to identify their phase lead based on Lissajous figure features. According to the proposed methods, simulation is performed with cosine waves superposing a Gaussian noise, and the results of it indicated that error of phase difference is less than 0.001 degrees when a SNR is bigger 45 and that identification of phase lead is valid and correct in a tiny phase difference. Furthermore, an experiment set-up has been developed to verify the effectiveness of the proposed method.

关键词： Phase Difference Cosine Ultrasonic Wave Hilbert Transform Lissajous Figure

作者: Long Jianjun Wu Baihai Wu Jinping

作者单位: Faculty of Electromechanical Engineering Guangdong University of Technology, Guangzhou, 510006, China

会议类型: 国际会议

会议名称: 2010 International Conference on Measuring Technology and Mechatronics Automation(ICMTMA 2010)(2010年检测技术与机电自动化国际会议)

会议地点: 长沙

会议语种:英文

页码: 1270-1273

在线出版日期: 2010-03-13（万方平台首次上网日期，不代表论文的发表时间）