基于声音的高精度距离与速度估计方法  

High precision range and speed estimation based on sound

作　　者：张磊[1] 何永刚[2] 胡志新[1] 范茂军[2] ZHANG Lei;HE Yonggang;HU Zhixin;FAN Maojun(Chang’an University,Xi’an 710064,China;The 3rd Research Institute,China Electronics Technology Group Corporation,Beijing 100846,China)

机构地区：[1]长安大学,陕西西安710064 [2]中国电子科技集团公司第三研究所,北京100846

出　　处：《传感器与微系统》2021年第6期40-43,51,共5页Transducer and Microsystem Technologies

基　　金：国家自然科学基金资助项目(62003053);陕西省自然科学基金资助项目(2020JQ-389)。

摘　　要：为提高基于声技术的室内定位系统在复杂遮挡环境中的定位性能。基于双曲调频(HFM)信号的频移不变特性,提出基于复合HFM信号的距离及速度高精度估计方法;针对频谱泄漏问题,给出了复合HFM信号调制形式。数值仿真结果表明,所提出方法的测距性能优于传统基于线性调频信号的测距方法。实验结果表明:距离估计误差小于0.1 m的概率为90%,小于0.05 m的概率为80%;速度估计误差小于0.1 m/s的概率为88%,小于0.09 m/s的概率为80%。无论是估计精度还是计算复杂度,均能够满足面向智能移动终端的室内定位系统要求。In order to improve localization performance of in-door localization system based on technique, based on the Doppler-invariant property of hyperbolic frequency modulation(HFM) signal, an accurate range and speed estimation method is proposed by using a compound HFM signal;and the specific modulation method of the compound HFM signal is given by concerning the spectrum leakage.The results of numerical simulation shows that the ranging performance of our proposed method is superior to conventional method based on linear frequency modulation signals.The experimental evaluation results show that the probability of range estimation errors less than 0.1 m and 0.05 m are 90 % and 80 %,respectively;the probability of speed estimation errors less than 0.1 m/s and 0.09 m/s are 88 % and 80 %.Both the estimation precision and computation complexity can meet the requirements of indoor positioning systems for smart mobiles, which means high values for real application and promotion.

关 键 词：声音 双曲调频信号 距离 速度 

分 类 号：TP912.3[自动化与计算机技术]