Analysis of Doppler effect on the pulse compression of different codes emitted by an ultrasonic LPS

This work analyses the effect of the receiver movement on the detection by pulse compression of different families of codes characterizing the emissions of an ultrasonic local positioning system. Three families of codes have been compared: Kasami, Complementary Sets of Sequences and Loosely Synchron...

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Bibliographic Details
Published in:Sensors (Basel, Switzerland) Switzerland), 2011-11, Vol.11 (11), p.10765-10784
Main Authors: Paredes, José A, Aguilera, Teodoro, Alvarez, Fernando J, Lozano, Jesús, Morera, Jorge
Format: Article
Language:English
Subjects:
Autocorrelation
complementary set of sequences
Doppler effect
doppler shift
Emittance
Filtering
kasami sequences
loosely synchronous sequences
Pulse compression
Receivers
Sensors
Sliders
Synchronous
ultrasonic LPS
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Summary:This work analyses the effect of the receiver movement on the detection by pulse compression of different families of codes characterizing the emissions of an ultrasonic local positioning system. Three families of codes have been compared: Kasami, Complementary Sets of Sequences and Loosely Synchronous, considering in all cases three different lengths close to 64, 256 and 1,024 bits. This comparison 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 that provides radial speeds up to 2 m/s. The performance of the codes under analysis has been characterized by means of the auto-correlation and cross-correlation bounds. The results derived from this study should be of interest to anyone performing matched filtering of ultrasonic signals with a moving emitter/receiver.
ISSN:1424-8220
1424-8220
DOI:10.3390/s111110765