Power line carrier communication system supporting long-distance transmission

Abstract

A power line carrier communication system supporting long-distance transmission comprises a first power line carrier communication module, a second power line carrier communication module, a power line carrier filtering device and a power line carrier modulation device. The first power line carrier communication module and the second power line carrier communication module are connected with eachother. A power detection module and a power line carrier communication signal amplification module are arranged in each power line carrier communication module; the first power line carrier communication module and the second power line carrier communication module are connected with power line carrier filtering devices, and each power line carrier filtering device is connected with a power line carrier modulation device. Optionally, when a plurality of ports exist, a combiner or a shunt needs to be introduced to connect signals of a plurality of input ports or output ports. By introducing thepower line carrier communication signal relay device, since an application processing module structure can be removed, the relay of the power line carrier signal can be completed only by using the signal processing circuit of the communication processor, the system design is simpler, the cost is reduced, and the power consumption is lower.

Description

technical field [0001] The invention belongs to the technical field of power line carrier communication, in particular to a power carrier communication system supporting long-distance transmission. Background technique [0002] The closest existing technology to this technology is the power line carrier communication technology. In the power carrier communication technology, the power carrier communication signal for transmitting data is modulated onto a 0-50MHz high-frequency modulation signal, and this high-frequency modulation signal is superimposed on the power line The 50Hz low-frequency AC power signal constitutes a power carrier signal, which is transmitted to other terminals of the power system along with the power cable. [0003] The main application scenario of the traditional power carrier communication technology is the power modem to access the Internet. The indoor Internet terminal modulates the signal into a power carrier signal through the power modem, and tr...

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Problems solved by technology

[0007] The purpose of the present invention is to provide a power carrier communication system that supports long-distance transmission, so as to solve the problem that signals in all frequency ranges cannot be amplified to the maximum allowable transmission power when relay equipment is used for power carrier communication relay. The problem of maximizing the relay distance of power carrier

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