Radio waves make the world go around. They make communication and navigation satellites possible, underpin modern aviation, and allow you to access the Internet without wires. One characteristic of radio technology is that traffic flows in only one direction at a time on a specific frequency.
That’s why pilots, police, and other walkie-talkie users frequently use “over” as they take turns speaking.
But now Stanford researchers have developed a way that allows wireless signals to be sent and received simultaneously on a single channel. Their research could help build faster, more efficient communication networks, at least doubling the speed of existing networks.
“Textbooks say you can’t do it,” said Philip Levis, assistant professor of computer science and of electrical engineering. “The new system completely reworks our assumptions about how wireless networks can be designed,” he said in a university release.
Levis and his team made the discovery bases on a seemingly simple idea. What if radios could do the same thing our brains do when we listen and talk simultaneously: screen out the sound of our own voice?
The main obstacle to two-way simultaneous conversation is that incoming signals are overwhelmed by the radio’s own transmissions, making it impossible to talk and listen at the same time.
“When a radio is transmitting, its own transmission is millions, billions of times stronger than anything else it might hear [from another radio],” Levis said. “It’s trying to hear a whisper while you yourself are shouting.”
For more Authorised info: ZDNet
But now Stanford researchers have developed a way that allows wireless signals to be sent and received simultaneously on a single channel. Their research could help build faster, more efficient communication networks, at least doubling the speed of existing networks.
Watch the accompanying video to see the wireless set-up in action.
“Textbooks say you can’t do it,” said Philip Levis, assistant professor of computer science and of electrical engineering. “The new system completely reworks our assumptions about how wireless networks can be designed,” he said in a university release.
Levis and his team made the discovery bases on a seemingly simple idea. What if radios could do the same thing our brains do when we listen and talk simultaneously: screen out the sound of our own voice?
The main obstacle to two-way simultaneous conversation is that incoming signals are overwhelmed by the radio’s own transmissions, making it impossible to talk and listen at the same time.
“When a radio is transmitting, its own transmission is millions, billions of times stronger than anything else it might hear [from another radio],” Levis said. “It’s trying to hear a whisper while you yourself are shouting.”
For more Authorised info: ZDNet
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