Rice's 'full-duplex' technology requires little hardware, could be prepared for 4.5G systems
HOUSTON -- (Sept. 6, 2011) -- The times of awaiting mobile phones to upload video might be designated. Grain College engineering scientists make a breakthrough that may allow wireless phone companies to double throughput on the systems without adding just one cell tower.
Rice's new "full-duplex" technology enables wireless products like mobile phones and electronic pills to both "talk" and "listen" to wireless cell towers on a single frequency -- something which requires two wavelengths today.
"Our solution requires minimal new hardware, both for mobile products as well as for systems, and that's why we have attracted the interest of nearly every wireless company on the planet,Inch stated Ashutosh Sabharwal, professor of electrical and computer engineering at Grain. "The larger change is going to be developing new wireless standards for full-duplex. I expect people may begin seeing this when service providers upgrade to 4.5G or 5G systems in a couple of years."
This Year, Sabharwal and Grain co-workers Melissa Duarte and Chris Dick released the very first paper showing that full-duplex was possible . That trigger an international race to show the technology could really supply inside a real network. This summer time, Sabharwal and Rice's Achaleshwar Sahai and Gaurav Patel set new performance records < http://arxiv.org/abs/1107.0607> having a real-time demo from the technology that created signal quality a minimum of 10 occasions much better than any formerly released result.
"We demonstrated our approach could support greater throughput and link reliability than other things which has been shown, the industry plus for wireless service providers," Sabharwal stated. "About the device side, we have proven that people can also add full duplex being an additional mode on existing hardware. Device makers love this because property inside mobile products is confined, also it means they do not have to add new hardware that only supports full duplex."
To describe why full-duplex wireless was lengthy thought impossible for wireless systems, Sabharwal uses the example of a couple standing far apart in a otherwise empty arena. If each shouts towards the other simultaneously, neither can hear exactly what the other says. The simple option would be to possess just one person speak at any given time, and that is what goes on on two-way radios where just one person may speak in a with time. Mobile phones achieve two-way communications by utilizing two different wavelengths to transmit and listen.
Rice's team transformed the entire-duplex hurdle by using an additional antenna plus some computing methods. Within the shouting example, as a result the shouter cannot hear themself, and for that reason listens to the only real other seem when it comes to -- the individual shouting from far.
"We send two signals so that they cancel one another in the receiving antenna -- the unit ears," Sabharwal stated. "The eliminating effect is purely local, therefore the other node can continue to hear what we are delivering."
He stated the cancellation idea is comparatively simple theoretically coupled with been suggested a while ago. But nobody had figured a method to implement the concept from suppliers and without needing complex new radio hardware.
"We repurposed antenna technology known as MIMO, that are common in present day products," Sabharwal stated. "MIMO means 'multiple-input multiple-output' also it uses several antennas to enhance efficiency. We required benefit of the multiple antennas for the full-duplex plan, the primary reason all wireless service providers are extremely confident with our technology."
Sabharwal stated Grain is likely to roll its full-duplex improvements into its "wireless open-access research platform," or WARP. WARP is an accumulation of prrr-rrrglable processors, transmitters along with other devices that make it easy for wireless scientists to check new ideas without building new hardware for every test. Sabharwal stated adding full-duplex to WARP allows other scientists to begin finding on the top of Rice's breakthrough.
"You will find groups which are already using WARP and our open-source software to contend with us," he stated. "This really is great because our vision for that WARP project would be to enable never-before-possible research and also to allow anybody to innovate freely with minimal startup effort."
Sabharwal's team went a measure further and accomplished asynchronous full-duplex too that's one wireless node can begin getting a signal while it's at the time of transmitting. Asynchronous transmission is import for service providers wanting to increase traffic on the systems, and Rice's team is the first one to demonstrate the technology.
"We have also created a preliminary theory that describes why our bodies is working the way in which it's,Inch Sabharwal stated. "That's important too for service providers and device makers, because engineers aren't prone to implement something similar to this with no obvious knowledge of fundamental tradeoffs."
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Rice's studies have been funded through the National Science Foundation, the Roberto Rocca Education Program and Xilinx Incorporated.
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