PROCEEDINGS OF THE 2nd WORKSHOP ON POSITIONING, NAVIGATION AND COMMUNICATION (WPNC’05) & 1st ULTRA-WIDEBAND EXPERT TALK (UET'05) Spread Spectrum Ultrasonic Positioning System

Abstract – Many mobile applications can be greatly enhanced when provided with the locations of people and devices. Indoor ultrasonic positioning system provide fine-grained position data for such applications. This paper describes an ultrasonic tagging system developed for monitoring the location of a moving target. Use of spread spectrum in ultrasonic location system allows the system to work at a noisy environment. In the same time it solves the problem of signal collisions when more than one transmitter transmit at the same time. Test results demonstrate that the system is able to locate the position of a moving target with high accuracy.