The Applications of Fractional Fourier Transform in Underwater Acoustic Trajectory Tracking

摘要：

As an important kind of non-stationary signals, the linear frequency modulation signals have been widely used in underwater acoustic communication systems and signal detection systems. The fractional Fourier transform is an effective transform manner to analyse non-stationary signals especially to detect linear frequency modulation signals. The time measurement manner can be changed into frequency measurement manner by employing fractional Fourier transform to detect linear frequency signals. In the receiver, we acquire time domain data of transmitted signal by measuring u-domain peak position of detected signal. Then we can find the beginning of transmitted signal. To enhance the time measurement precision of this manner, we truncate some points of transmitted signal in the transmitter to make the u-domain peak position shift susceptive. This paper mainly simulates target trajectory tracking under underwater acoustic condition. We overlap several truncated linear frequency modulation signals to transmit. Using the fractional Fourier transform to detect linear frequency modulation signals, to acquire the time delay between targets and transducer arrays. Target bearing is resolved by hyperboloid intersection algorithm to track trajectory of the target.

关键词： Terms-fractional Fourier transform hyperboloid intersection algorithm target trajectory tracking

作者: Yilin Wang Xiaoxue Wang Ping Cai

作者单位: Department of Underwater Acoustic Engineering Underwater Acoustic Technology Key Lab of Science and Technology for National Defense Harbin,Heilongjiang Province,China

会议类型: 国际会议

会议名称: 2010 IEEE信息与自动化国际会议(ICIA 2010)

会议地点: 哈尔滨

会议语种:英文

页码: 1-4

在线出版日期: 2010-06-20（万方平台首次上网日期，不代表论文的发表时间）