Effect of receiver movement on signal detection in an ultrasonic LPS

This work analyses the effect of the receiver movement on the pulse compression of the signals emitted by the beacons of an Ultrasonic Local Positioning System (ULPS). This analysis is first carried out by using a system model in order to obtain a set of results that are then experimentally validated with the help of an electric slider. The signals emitted by the ultrasonic beacons are encoded with Kasami sequences of four different lengths (15, 63, 255 and 1024 bits), and radial speeds of up to 2 m/s have been considered in the experimentation. The results derived from this study should be of interest to anyone performing matched filtering of ultrasonic signals with a moving emitter/receiver.

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