Transmitting end, receiving end, system and method for power line communication of contact network

A technology of power line communication and catenary, which is applied to the receiving end and the sending end of catenary power line communication, can solve the problems that have not been raised, and achieve the effect of being stable and widely distributed
CN102710385AActive Publication Date: 2012-10-03BEIJING JIAODA MICROUNION TECH
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
BEIJING JIAODA MICROUNION TECH
Publication Date
2012-10-03

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Abstract

The invention discloses a transmitting end, a receiving end, a system and a method for power line communication of a contact network and belongs to the technical fields of railway communication and urban rail communication. The transmitting end comprises the following modules including an application layer encoder, a physical layer encoder and a physical layer modulator, namely an OFDM (Orthogonal Frequency Division Multiplexing) modulator, wherein the application layer encoder is used for receiving source information and providing an encoding data stream; the application layer encoder comprises a CRC (Cyclic Redundancy Check) encoding and fountain code coding cascade; the physical layer modulator is used for receiving a data stream of the application layer encoder and has functions of forward error correcting and encoding; and the physical layer modulator is used for receiving a data stream of the physical layer encoder and generating an output signal by using an OFDM modulation mode. The invention further discloses a corresponding receiving end, a system and transmitting and receiving methods. Due to the combination of a fountain code cross-layer technology, a physical layer channel encoding and OFDM modulation technology, the problem of five kinds of noises of general power line communication is solved; and particularly due to the adoption of the fountain code cross-layer design, the problem that the on-off of a contact network channel and a current collector are intervened by electric spark pulse noise of the contact network is solved.
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Description

technical field

[0001] The invention relates to the technical field of railway signal communication and urban rail signal communication, in particular to a sending end, receiving end, system and method of catenary power line communication. Background technique

[0002] The most important themes of railway transportation are safety and efficiency, and the signal communication system is an important prerequisite for improving efficiency and ensuring safety. At present, the vehicle-ground information transmission methods mainly include track circuits, track loops, leaky waveguides, inquiry transponders, and wireless communications. These traditional communication methods have their own advantages and disadvantages. The signal may be blocked due to factors such as geological structure, track pollution and corrosion, and locomotive traction current interference, or the signal equipment may fail due to external forces such as thunderstorms and mudslides. The currently disclosed t...

Claims

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