Stuart Corner
Tuesday, 12 December 2006 13:47
Business IT -
Technology
Page 1 of 2
Cohda Wireless - a University of South Australia spin-off now headquartered in the US - has set up a broadband wireless network in Adelaide to demonstrate its "WiFi enhancing" technologies and to reinforce its claims that standard WiFi is ill-suited to municipal WiFi networks, despite the build-out of many such installations.
Cohda is demonstrating "demanding" real-time applications such as streaming full motion video from in-vehicle cameras, VoIP teleconferencing, integrated automatic vehicle location tracking, and other applications. It claims that its technology is able to accomplish this with "significantly fewer access points deployed in non line-of-sight (NLOS) conditions compared to today's municipal broadband wireless networks, which typically require line-of-sight between nodes."
"These trials have simulated various [public safety communications] scenarios, including public safety vehicles moving at high speeds [and] maintaining seamless video and VoIP links from the vehicle to a command centre through a challenging outdoor radio frequency environment. Additionally, the command centre is able to track the location of all vehicles via integrated GPS tracking," Cohda claims.
Cohda claims that its patent-pending, zero-latency OFDM receiver architecture and algorithms "are interoperable with IEEE standards and designed to exploit all available sources of diversity (time, frequency and spatial), making it essentially impervious to the effects of mobility and multipath outdoors."
According to Cohda CEO, Martin Suter, "Cohda Wireless' advanced receiver technology is fundamentally changing the performance characteristics and economics of 802.11 in outdoor, mobile environments, as evidenced by the success of our test deployment."
He claimed that "Current 802.11 devices use chips designed for indoor use at pedestrian speeds, and which perform poorly in outdoor, mobile environments. With [the Adelaide] network, Cohda is proving the viability of 802.11 in the most challenging use cases and is able to demonstrate qualitative and quantitative gains over commercial, off-the-shelf Wi-Fi chipsets."
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