基于循环互相关的声源定位提速方法  

Acoustic Location Acceleration Method based on Cyclic Cross-Correlation

作　　者：花雨飞 张印强 李丽娟 HUA Yufei;ZHANG Yinqiang;LI Lijuan(College of Electrical Engineering and Control Science,Nanjing Tech University,Nanjing 211800,China)

机构地区：[1]南京工业大学电气工程与控制科学学院,江苏南京211800

出　　处：《电声技术》2021年第6期13-17,共5页Audio Engineering

基　　金：国家自然科学基金面上项目(No.61873121);江苏省自然科学基金面上项目(No.BK20181376)。

摘　　要：基于宽带信号时延估计的声源定位系统计算量大、耗时长、内存占用高,在单片机上部署时受到性能限制而不能获得较高的定位精度以及实时性。针对这一问题,研究用于时延估计的广义互相关算法,提出使用循环互相关,配合周期循环的线性调频信号进行声源定位。该声源定位系统减半了互相关所需的运算量,同时减少了占用的内存。通过搭建的麦克风阵列测试平台进行实验,结果表明该算法具有良好的提速效果。The acoustic location system based on time delay estimation of wideband signal is computationally intensive,timeconsuming,and memory intensive.When deployed on a single-chip microcomputer,it is limited by the computing performance and cannot obtain high accuracy and real-time performance.To solve this problem,this paper studied the generalized cross-correlation algorithm for time delay estimation,and proposed a method,which uses cyclic cross-correlation along with a periodic chirp signal to realize the location.This acoustic location system halves the amount of calculation required for cross-correlation and at the same time reduces the memory occupancy.Finally,experiments were carried out through the built-up microphone array test platform.The result shows that this algorithm has a good speed-up effect.

关 键 词：声源定位 时延估计 循环互相关 麦克风阵列 线性调频信号 单片机 

分 类 号：TN912.3[电子电信—通信与信息系统]