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最近,可见光通信有了新进展——无需WiFi信号,只要点亮一盏LED灯就能实现你无线上网的愿望。说起来,可见光通信并不是很神秘:研究者通过微芯片控制LED灯泡的明灭变化,将二进制数据编码成光信号,灯亮表示1,灯灭表示0。这些信息能被接收器捕获并解调出来,而人眼却不会察觉到LED灯的变化——因为它们闪烁得实在太快了。研究者将网络信号接入一盏功率为1W的LED灯,与接收器相连的4台电脑就都能够上网。
Recently, visible light communication has made new progress - without WiFi signal, as long as a light LED lights will be able to achieve your desire to wireless Internet access. Speaking, visible light communication is not very mysterious: the researchers through the microchip LED light bulb to control the change of light and dark, the binary data encoded into optical signals, lights that 1, lights off that 0. This information can be captured by the receiver and demodulated, but the human eye is not aware of the LED lights change - because they flicker too fast. Researchers will network signal access to a power of 1W LED lights, and the receiver connected to the four computers will be able to access the Internet.