Japanese Mobile Phone service provider NTT DoCoMo Inc. has demonstrated download speeds of up to 250mbps during trials of a novel 3G cellular technology in Yokosuka Japan.
These speeds exceed existing wired broadband speeds by several order of magnitudes and are at least 12 times faster than current ADSL2+ speeds available in UK or roughly 100 times quicker than current wireless broadband services offered by Vodafone and the likes.
The technology is called Super 3G and is part of the Long Term Evolution process of the 3GPP (3rd Generation Partnership Project) which controls the 3G cellular systems.
In July last year, NTT Docomo announced its intention to launched the Super 3G system with speeds of up to 300mbps, a souped-up version of HSDPA and HSUPA technologies.
It uses four Multiple-Input Multiple-Output (MIMO) antennas for both the base station (transmission side) and mobile station (receiving side) , a technology similar to existing MIMO ADSL routers like the one below.
The technology, which operates in the 20MHz bandwidth, is scheduled to be rolled out in 2009 and deployed to the company's 53 million customers.