基于CDMA-TDOA的室内超声波定位系统

J4 ›› 2012, Vol. 30 ›› Issue (2): 213-217.

基于CDMA-TDOA的室内超声波定位系统

肖金红,刘智|杨阳|刘丹

长春理工大学电子信息工程学院|长春 130022

收稿日期:2011-09-06 出版日期:2012-03-28 发布日期:2012-04-19
作者简介:肖金红（1986—）|男|江西赣州人|长春理工大学硕士研究生|主要从事短距离无线通信、无线传感器网络研究|（Tel）86-13844949809（E-mail）jinhong.xiao@hotmail.com;刘智（1971—）|男|长春人|长春理工大学教授|主要从事固态成像技术、大气激光通信技术研究|（Tel）86-18946557983（E-mail）liuzhi@cust.edu.cn。

Indoor Ultrasonic Positioning |System Based on CDMA-TDOA

XIAO Jin-hong|LIU Zhi|YANG Yang|LIU Dan

College of Electronic and Information Engineering,Changchun University of Science and Technology, Changchun 130022,China

Received:2011-09-06 Online:2012-03-28 Published:2012-04-19

摘要/Abstract

摘要：

针对国内外对室内定位技术中定位精度不高问题，提出一种基于CDMA（Code Division Multiple Access）TDOA（Time Difference of Arrival）的室内超声波定位系统，并给出实时性差异等缺点，进行了其工作原理和超声波信号的分析。该系统基于射频和超声波传感器的固有性质，对超声波信号采用CDMA技术进行编码，以便在目标节点上能区分各个信标发来的超声波信号，并结合射频信号实现TDOA测距算法，最终实现三维定位。采用Matlab/Simulink模块对3个信标的超声波信号进行发射仿真与分析。仿真结果表明，该系统在目标节点上能被接收并识别相对应的超声波信号。

关键词: 超声波定位, CDMA技术, TDOA测距算法

Abstract:

For the disadvantages of based on CDMA (Code Division Multiple Access)TDOA (Time Difference Of Arrival) low accuracy for the indoor positioning technology, we proposed a indoor ultrasonic positioning system, and described its working principle and analysed ultrasonic signals. The system that is based on the character of radio frequency and ultrasonic sensors encodes the ultrasonic signal using CDMA technology, so that the destination node can distinguish which beacon signal is sent to the ultrasound, and they combines with the RF signals to achieve TDOA location algorithm, and ultimately does threedimensional positioning. The ultrasonic signal of the three beacons is made simulation and analysis by Matlab/Simulink blocks. Finally, simulation results from the three beacons that send a coded ultrasonic signal can be received and identified at the destination node.

Key words: ultrasonic positioning, code division multiple access（CDMA）, time difference of arrival（TDOA）

中图分类号:

TP273

肖金红,刘智|杨阳|刘丹. 基于CDMA-TDOA的室内超声波定位系统[J]. J4, 2012, 30(2): 213-217.

XIAO Jin-hong|LIU Zhi|YANG Yang|LIU Dan. Indoor Ultrasonic Positioning |System Based on CDMA-TDOA[J]. J4, 2012, 30(2): 213-217.