一种新的基于DSP的声时延估计方法  

New Way of Acoustic Time Delay Estimation Based on DSP

作　　者：李飞[1] 杨卫[1] 张皎[1] 

机构地区：[1]中北大学电子测试技术国防重点试验室,山西太原030051

出　　处：《仪表技术与传感器》2010年第11期93-95,共3页Instrument Technique and Sensor

摘　　要：针对传统声时延估计算法速度较慢的问题,提出了基于脉冲声源和DSP的时延估计方法。声脉冲信号可认为是脉冲信号对声信号的调制,解调出脉冲信号,利用DSP捕捉单元捕捉脉冲边沿,即可得到时延估计。该方法不需要对声信号进行数模转换,也不需要大量数据处理,速度较快。设计了系统硬件电路,通过实验验证和分析,证明了该方法能够满足高速定位的需要。Aimed at improving the speed of acoustic time-delay estimation,a new method based on pulse acoustic source and DSP was put forward.The acoustic pulse signal can be considered that sound signal is modulated with pulse signal.By demodulating pulse signal and catching the pulse edge with DSP capture-unit,the time-delay estimation can be acquired.This method does not require converting acoustic signal to digital signal and a large amount of data processing,so it has high speed.The hardware circuit was designed.The experiments and data analysis show that the method can meet the need of high-speed acoustic location.

关 键 词：声定位 时延估计 脉冲声源 检波 捕捉单元 

分 类 号：TP399[自动化与计算机技术—计算机应用技术]