Power line carrier-based LED visible light communication system

Abstract

The invention discloses a power line carrier-based LED visible light communication system, comprising an uplink and a downlink. The downlink comprises a PC transmitting terminal, wherein the PC transmitting terminal accesses an electric power grid via a power line PLC modulator, a power line PLC modulator is connected with the electric power grid and is connected to an FPGA encoder, and the FPGA encoder is connected to a an LED light-emitting device; and a plurality of terminal devices, wherein each terminal device is connected to an FPGA encoder, the FPGA encoder is connected with a signal processing module, and the signal processing module is connected with a photodetector. Optical signals emitted by the an LED light-emitting device is converted to electrical signals by the photodetector, the electrical signals are then amplified and processed by the signal processing module to be recovered into signalsidentical with signals modulated by the PC transmitting terminal, and at last the signals are transmitted to the terminal devices via the FPGA encoder. The uplink is configured to be symmetrical to the downlink, so as to achieve a full-duplex communication.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to an LED visible light communication system based on power line carrier. Background technique [0002] Compared with the pure LED optical communication wireless network system, the uplink requires higher requirements on the transmission frequency and angle of the mobile terminal, and requires more research on physical layer technology. Information cannot be transmitted between partitions in the area, and auxiliary network transmission is required. At present, the transmission speed is not high, and the market application cannot be realized in the early stage, and the promotion is relatively difficult. [0003] At present, more mature wireless communication systems such as radio and infrared in the market have more leaps in technological innovation and progress, and the existing technologies have the following shortcomings: [0004] (1) Harmful to people [0005] Unde...

AI Technical Summary

Problems solved by technology

[0020] In order to overcome the technical defects of RF and infrared wireless network communication in the prior art, such as instability, poor security, slow transmission speed, short transmission distance, damage to the human body, and easy interference, as well as the inability of simple LED visible light communication In order to realize the transmission of information between the partition walls in the area, auxiliary network transmission is required, and the transmission rate is not high. LED visible light communication system provides better technical and product support for the development and application of the Internet, Internet of Things, 3G, and 4G networks

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