Communications of the ACM
Researchers at University of Virginia Use Leds to Create Wireless Networks
Researchers at the University of Virginia have developed a way to use light waves from light-emitting diode fixtures to carry signals to wireless devices.
Credit: whosgreenaz.com
An enhancement for Wi-Fi-based networks could enable more data to be transmitted without using additional energy.
The method developed by researchers at the University of Virginia (U.Va.) uses light waves from light-emitting diode (LED) fixtures to carry signals to wireless devices at 300 Mbps from each light.
The team developed a modulation algorithm that increases the throughput of data in visible light communications, says U.Va. professor Maite Brandt-Pearce. "We can transmit more data without using any additional energy," she notes. "As more light fixtures get replaced with LED lights, you can have different access points to the same network."
The modulation method has potential for widespread use because it can work in any place that has lighting, including areas where radio waves create problems or are not permitted.
The team calls the method Li-Fi and says it is not a replacement for Wi-Fi. "Our modulation can be used in any optical device so this has the potential for widespread use and much better access than present Wi-Fi based on radio waves," Brandt-Pearce says.
From FierceWirelessTech
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