<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>10</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Ledeczi, Akos</style></author><author><style face="normal" font="default" size="100%">Sallai, Janos</style></author><author><style face="normal" font="default" size="100%">Volgyesi, Peter</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">RF Bearing Estimation in Wireless Sensor Networks</style></title><secondary-title><style face="normal" font="default" size="100%">Government Microcircuit Application and Critical Technology Conference (GOMACTech 09)</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">CNS-0721604</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2009</style></year><pub-dates><date><style  face="normal" font="default" size="100%">03/2009</style></date></pub-dates></dates><pub-location><style face="normal" font="default" size="100%">Orlando, FL</style></pub-location><abstract><style face="normal" font="default" size="100%">This paper introduces a novel method for bearing estimation based on a rotating antenna generating a Doppler shifted RF signal. The small frequency change can be measured even on low cost resource constrained nodes using a radio interferometric technique introduced previously. Measuring the Doppler shift at two known locations provides a bearing estimate to the rotating node. An alternative approach employing a switched antenna array is proposed that provides improved robustness by avoiding moving parts.</style></abstract></record></records></xml>