<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>47</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%">Ureña, J.</style></author><author><style face="normal" font="default" size="100%">Álvaro Hernández</style></author><author><style face="normal" font="default" size="100%">Ana Jimenez</style></author><author><style face="normal" font="default" size="100%">José Manuel Villadangos</style></author><author><style face="normal" font="default" size="100%">María del Carmen Perez</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Modeling a Turbulent Atmosphere as a Dynamic Channel for Narrow-Band Ultrasonic Signals</style></title><secondary-title><style face="normal" font="default" size="100%">19th International Congress on Acoustics (ICA'07)</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">DYNAMIC CHANNEL</style></keyword><keyword><style  face="normal" font="default" size="100%">narrowband ultrasonic signals</style></keyword><keyword><style  face="normal" font="default" size="100%">TURBULENT ATMOSPHERE</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2007</style></year><pub-dates><date><style  face="normal" font="default" size="100%">02/09/2007</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.sea-acustica.es/WEB_ICA_07/fchrs/papers/ult-10-019.pdf</style></url></web-urls><related-urls><url><style face="normal" font="default" size="100%">https://geintra-uah.org/system/files/MODELING_A_TURBULENT_ATMOSPHERE_AS_A_DYNAMIC_CHANNEL_FOR.pdf</style></url></related-urls></urls><pub-location><style face="normal" font="default" size="100%">Madrid, España</style></pub-location><volume><style face="normal" font="default" size="100%">ULT10-19</style></volume><pages><style face="normal" font="default" size="100%">1-6</style></pages><isbn><style face="normal" font="default" size="100%">84-87985-12-2</style></isbn><language><style face="normal" font="default" size="100%">English</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;This work proposes a semi-empiric model for a turbulent atmosphere as a dynamic channel of transmission of narrow-band ultrasonic signals. It is based on a theoretical expression for the coherence time derived in a previous paper, and on the results obtained from the experimental analysis of propagation of a 50 kHz ultrasonic tone under different turbulence conditions. The model is used to predict the effects of a turbulent atmosphere on the propagation of binary encoded signals and their consequent detection by matched filtering. These predictions are compared with the results obtained with a real pulse compression system operating outdoors.&lt;/p&gt;</style></abstract></record></records></xml>