Single-light-source bidirectional communication system based on visible light communication and power line transmission

Abstract

The invention discloses a single-light-source bidirectional communication system based on visible light communication and power line transmission, and relates to the field of communication systems. Afirst interface processing module is connected with an equipment port; a light source modulation module is connected with the first interface processing module, and turns on the visible light source to serve as a signal sending end; a light source receiving and photoelectric conversion module converts a light signal into an electric signal; a signal amplification and denoising module is connectedwith the light source receiving and photoelectric conversion module; a second interface processing module is connected with the signal amplification and denoising module, and transmits the signal to aterminal module to complete downlink communication; a power line signal modulation module is connected with the second interface processing module, and modulates a signal returned to the second interface processing module by the terminal module to a power line for uplink signal transmission; a power line signal receiving module is used for extracting signals on a power line and transmitting the signals to the first interface processing module, and the first interface processing module transmits the signals to the equipment port, so the uplink communication is completed.

Description

technical field [0001] The present invention relates to the field of visible light communication systems, in particular to a single light source bidirectional communication system based on visible light communication and power line transmission. Background technique [0002] With the development of visible light communication, people have made a huge breakthrough in the rate of visible light communication. As a new type of wireless communication technology, it has a large communication bandwidth, and through appropriate modulation and demodulation technology, its rate can reach 10Gbit / s is even higher. The actual application of visible light communication requires two-way communication. For example, a two-way transmission visible light communication device described in the invention patent CN105915284 A can simultaneously realize downloading and uploading data within the range of visible light bands, including uplinks and downlinks. However, different modulation and demodu...

AI Technical Summary

Problems solved by technology

For example, "Design of Full-duplex Visible Light Communication System Based on Single Light Source" published by Yang Yufeng and others at the Laser and Optoelectronics Exhibition, the downlink of the system described in the article uses a visible light communication link, while the uplink uses a "cat's eye" The reverse modulator modulates the downlink optical signal twice, modulates the uplink information onto the downlink optical signal and reflects it back to the active-end single-light source system to realize single-light two-way communication, but this method is more complicated to implement. And the speed is not high

In the research of single-light two-way systems, the downlink basically uses visible light communication to undertake the main data transmission. Low, bluetooth, cat's eye technology has shortcomings such as unstable communication links, so that the two-way communication of single light source has not been well applied to daily family life

Images