<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Fernando J. Álvarez</style></author><author><style face="normal" font="default" size="100%">Álvaro Hernández</style></author><author><style face="normal" font="default" size="100%">JA. Moreno</style></author><author><style face="normal" font="default" size="100%">María del Carmen Pérez</style></author><author><style face="normal" font="default" size="100%">Ureña, J.</style></author><author><style face="normal" font="default" size="100%">Carlos De Marzziani</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Doppler-tolerant receiver for an ultrasonic LPS based on Kasami sequences</style></title><secondary-title><style face="normal" font="default" size="100%">Sensors and Actuators A: Physical</style></secondary-title><short-title><style face="normal" font="default" size="100%">Sensors and Actuators A: Physical</style></short-title></titles><dates><year><style  face="normal" font="default" size="100%">2012</style></year><pub-dates><date><style  face="normal" font="default" size="100%">10/2012</style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">189</style></volume><pages><style face="normal" font="default" size="100%">pp. 238-253 </style></pages><language><style face="normal" font="default" size="100%">English</style></language><abstract><style face="normal" font="default" size="100%">This paper presents the design of a novel receiver for a broadband ultrasonic Local Positioning System (LPS). As in other devices based on matched filtering of the transmitted encoded signals, this receiver features high robustness to noise and multiple access capability. Unlike previous solutions, the proposed
receiver is capable of detecting beacons emissions despite being installed in a fast moving device, and it also provides estimation of its velocity. The system has been implemented in an FPGA-based architecture.
An experimental analysis of performance has been carried out. Firstly using a set of test signals synthetically generated to simulate different positions and velocities of the receiver. Secondly, a set of real signals obtained with a prototype have been used. The simulated results show the capability of the system to detect the encoded signals emitted by the LPS infrastructure when the device is moving at velocities of up to 3 m/s under low SNR conditions. The real results confirm the improved system capability, but also make evident the negative influence that phenomena such as the transducers response and multipath propagation can have on system performance.</style></abstract><custom2><style face="normal" font="default" size="100%">Escuela Politecnica Superior</style></custom2><custom3><style face="normal" font="default" size="100%">University of Extremadura
University of Alcala</style></custom3><custom4><style face="normal" font="default" size="100%">&lt;p&gt;Department of Electronics&lt;/p&gt;</style></custom4></record></records></xml>