At present, most of the wireless communication between home and business is connected via RF WiFi. However, due to the limited bandwidth of WiFi, it is not always possible to find more available channels in the already saturated radio spectrum. However, the wireless communication bandwidth in the visible spectrum can also be utilized.
Indoors, you can use the lights to flash to generate signals. The flashing frequency is faster than the human eye, so people will not be affected. On the other hand, because the visible light signal can't penetrate the wall, there is no interference from spurious signals, and there is no need to worry about foreign hackers.
Incandescent and fluorescent lamps do not provide fast flashing frequencies, so LED bulbs must be used to transfer data. Although commercial LED lamps only have a limited bandwidth of a few megahertz, the research team said that by preserving the blue spectrum through LED filtering technology, it can be increased to 10 times the bandwidth.
Through the lab's visible-light radio network, they can download data at 100 megabits per second, but after updating the receiver, the download speed can be increased to 230 megabits per second, which is a commercial LED application. The fastest record of visible light wireless communication.
Jelena Vucic, a researcher at the Hanley Hertz Institute in Germany, said that in the future, broadband Internet access would be as easy as switching lights, and the light bulbs in the home would one day become a medium for transmitting wireless signals. The benefit of this application is that it can effectively use the lighting in the room to make the lighting and information synergistic.
Lena Vucic said that while advanced radio signals can achieve fairly fast transmission speeds, they should be able to take advantage of more complex modulation methods to double the transmission speed.
Indoors, you can use the lights to flash to generate signals. The flashing frequency is faster than the human eye, so people will not be affected. On the other hand, because the visible light signal can't penetrate the wall, there is no interference from spurious signals, and there is no need to worry about foreign hackers.
Incandescent and fluorescent lamps do not provide fast flashing frequencies, so LED bulbs must be used to transfer data. Although commercial LED lamps only have a limited bandwidth of a few megahertz, the research team said that by preserving the blue spectrum through LED filtering technology, it can be increased to 10 times the bandwidth.
Through the lab's visible-light radio network, they can download data at 100 megabits per second, but after updating the receiver, the download speed can be increased to 230 megabits per second, which is a commercial LED application. The fastest record of visible light wireless communication.
Jelena Vucic, a researcher at the Hanley Hertz Institute in Germany, said that in the future, broadband Internet access would be as easy as switching lights, and the light bulbs in the home would one day become a medium for transmitting wireless signals. The benefit of this application is that it can effectively use the lighting in the room to make the lighting and information synergistic.
Lena Vucic said that while advanced radio signals can achieve fairly fast transmission speeds, they should be able to take advantage of more complex modulation methods to double the transmission speed.
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