As they are gradually replaced by LEDs, every home, office, public building and evenstreetlight could become a Li-Fi hotspot.
随着电灯泡逐渐被LED所取代,每家每户、办公室、公共建筑物、甚至路灯都可能成为一个Li-Fi热点。
Having a line-of-sight connection with the LED in question would undoubtedly improve thesignal,
若你正在使用的LED光源处于视线范围内,信号强度无疑会有所增加,
but light reflected from walls or ceilings might often be enough.
不过仅靠墙壁或天花板的反射光可能往往也足够了。
In any case, having a good line of sight helps Wi-Fi as well.
同样,不论如何,若在视线之内有Wi-Fi信号源,信号当然也会更强。
And spotting a nearby light in order to sit next to it is certainly easier than finding the locationof a Wi-Fi router.
而在身边找一个光源就近使用之当然要比寻找Wi-Fi路由器来得容易。
Communication, though, is a two-way street.
不过通信是双向的。
That means the LEDs involved in Li-Fi would need photodetectors to receive data.
这意味着Li-Fi中的LED需要有光电探测器来接收数据。
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