The current stage of railway transportation systems must deal with increased safety and reliability issues. A key point is improving occupancy track circuit performance and providing them with redundancy, higher noise immunity, and the capability to acquire additional information about the track section involved. This work proposes a novel track circuit based on the encoding of the electrical transmissions with Kasami codes. Track circuit emitters send signals coded with a known sequence that can be identified by the corresponding receivers using correlation techniques; these processes increase immunity to noise and changes in environmental conditions. An appropriate selection of orthogonal sequences for encoding, as well as different carrier frequencies for transmissions, allow simultaneous emissions and receptions without cross interference.
FPGA-Based Track Circuit for Railways Using Transmission Encoding
IEEE Transactions on Intelligent Transportation Systems ; 13 , 2 ; 437-448
2012-06-01
1125471 byte
Article (Journal)
Electronic Resource
English
FPGA-Based Track Circuit for Railways Using Transmission Encoding
Online Contents | 2012
|Track circuit developments on the underground railways
Engineering Index Backfile | 1923
A track circuit block signal for electric railways
Engineering Index Backfile | 1903
The track circuit as installed on steam railways
Engineering Index Backfile | 1907
|Block signaling of electric railways with track circuit control
Engineering Index Backfile | 1904
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