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News

BAE Systems - real-time mobile testing of communication systems


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BAE Systems
: 21 September, 2009  (Company News)
BAE Systems has completed the first real-time mobile tests of new wireless military radio technology designed to help warfighters dispense critical communications without interruption during battle. The technology allows more traffic on more networking systems, giving users an advantage during air-to-air, air-to-ground, and soldier-to-soldier communications.
Under a $15.5 million Defense Advanced Research Projects Agency (DARPA) contract, the company is developing wireless radios that can untangle interfering digital communications signals. The DARPA Interface Multiple Access, or DIMA, program aims to greatly increase network capacity and performance in highly congested mobile networks. The radios will allow multiple transmissions to occur simultaneously on one frequency and can support as many as five simultaneous conversations into the same time and frequency slot, even in the presence of severe near-far interference.

'With current technology, bandwidth is shared through assignment of unique time slots, frequency slots, or code words for each user, significantly limiting network performance,' said Dr. Brian Pierce of DARPA. 'DIMA buys back the capacity loss caused by those limitations with technology that separates multiple, interfering digital signals.'

Known as multi-user detection, BAE Systems' real-time technology enables users to communicate simultaneously on the same channel without centralized control or infrastructure. Recent experiments validated the technology in a mobile, ad-hoc network environment and demonstrated the vehicle-mounted DIMA radio's ability to receive up to five simultaneous transmissions from different users while traveling at 15 mph.

'By next March, we expect to operate at speeds greater than 30 mph in highly interfering scenarios, and may even operate as high as 60 mph,' said Joshua Niedzwiecki, manager of BAE Systems' communications and signal exploitation research group. 'This would further validate the technology in more operational scenarios. If fielded in Iraq, for example, it could prove vital in areas where interfering electronic transmissions reduce the amount of transmittable military communications.'
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