<?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%">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><author><style face="normal" font="default" size="100%">Thibodeaux, Ryan</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Differential Bearing Estimation for RF Tags</style></title><secondary-title><style face="normal" font="default" size="100%">EURASIP Journal of Embedded Systems</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%">xx/2009</style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">(in press)</style></volume><abstract><style face="normal" font="default" size="100%">Fusing spatially distributed observations in wireless sensor networks or asset tracking in a shipyard are just two example applications where the location of radio nodes needs to be known. Localization and tracking of wireless nodes have been an active research area, yet a universal solution has not emerged so far. 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. Bearing information between anchors nodes at known locations and RF tags at unknown positions can be derived. A few such measurements provide enough information to enable accurate node localization.</style></abstract></record></records></xml>