Correlation Property Analysis for the Pulse Position Modulation Sequence used for Non-Crosstalk Sonar Systems

摘要：

The correlation property of pulse position modulation (PPM) sequences for non-crosstalk sonar systems is analyzed. To eliminate ultrasonic crosstalk, normally each ultrasonic transducer is assigned a coded excitation signature in the transmission and then the code is identified using a correlation match in the receiver. Therefore, the correlation property is very important for the excitation sequence of a noncrosstalk sonar system. Two ratios are used to characterize the correlation property, one is the ratio between the maximal side lobe and main lobe in the autocorrelation function, and the other is the ratio between the maximal peak of cross-correlation function and the main lobe of the autocorrelation function. The smaller the two ratios are, the better the correlation property is. A sufficient condition is derived and obtained to achieve the suboptimal correlation property for PPM excitation sequences. Experiments using SensComp 600 series electrostatic transducers validate the derived sufficient condition.

关键词： Sonar ultrasonic crosstalk correlation property pulse position modulation sufficient condition

作者: Jia-Lin HU Qing-Hao MENG Han-Yang PENG Ming ZENG

作者单位: School of Electrical Engineering and Automation, Tianjin University Tianjin, China

会议类型: 国际会议

会议名称: 2011 4th International Congress on Image and Signal Processing(第四届图像与信号处理国际学术会议 CISP 2011)

会议地点: 上海

会议语种:英文

页码: 2313-2317

在线出版日期: 2011-10-15（万方平台首次上网日期，不代表论文的发表时间）