TY - CONF T1 - IR sensor array configuration and signal processing for detecting obstacles in railways T2 - Third IEEE Sensor Array and Multichannel Signal Processing Workshop (SAM?04) Y1 - 2004 A1 - J.J. Garcia A1 - Ureña, J. A1 - Álvaro Hernández A1 - Manuel Mazo A1 - Garcia, Juan Carlos A1 - Fernando J. Álvarez A1 - Jose Antonio Jimenez A1 - Patricio Gabriel Donato A1 - María del Carmen Perez KW - detecting obstacles in railways KW - IR sensor array AB - This work describes a sensor array based on optical emitters, which allows io detect obstacles in railways. The sensorial system consists of a barrier of emitters and another of receivers, placed at opposite sides of the railway. Apart from the disposition of the sensorial I system, it is necessary a codification method for the emission in order to detect the reception or the nonreception of transmissions between an emitter and a receiver. The method is based on a signal codification using complementary sequence pairs, suitably adapted for their simultaneous emission through the transmission channel. A high reliability under adverse conditions is achieved with the developed system, being possible to . detect the presence of obstacles, and to inform about their situation. JF - Third IEEE Sensor Array and Multichannel Signal Processing Workshop (SAM?04) PB - IEEE CY - Sitges, España VL - CD SN - 07803-8546-2 UR - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1502940 ER -