Intel Friday demonstrated a prototype Ultra Wideband radio system transmitting data at over 220M bit/sec, and claimed a world-first for the speed.

The prototype was demonstrated by Kevin Kahn, head of Intel's communications and interconnect technology laboratory, as part of his keynote speech at the Intel Developer Forum (IDF) Japan event, which ended Friday at Maihama just outside Tokyo.

The transmitter and receiver pair, which Kahn said were just out of the laboratory, achieved a sustained data rate of around 220M bit/sec over a distance of about one meter for approximately 2 hours while on display on the IDF Japan stage. The data rate is more than double that of a system Intel showed in Japan a year ago: That system was working at 100M bit/sec.

UWB is a relatively new wireless technology that is still under development. It is being eyed by many companies as a system to connect computers to each other or nearby peripherals, and as a replacement for slower technologies like Bluetooth. Commercial UWB products are expected sometime in 2004 or 2005.

The standard is being pushed by Intel and several other companies at the IEEE 802.15 Working Group for Wireless Personal Area Networks.

UWB is able to achieve such high data transmission rates because it transmits data over a very large chunk of the frequency spectrum. As currently approved by the U.S. Federal Communication Commission it utilizes 7.5 GHz of spectrum between 3.1 GHz and 10.6 GHz - an area over 80 times as wide as that used by 802.11b wireless LANs and about 25 times as wide as the higher speed 802.11a technology.

The area in which UWB operates is already home to numerous other services, including communication services, space research and also 802.11a wireless LAN (WLAN) technology. To avoid interference with existing users the system is permitted to operate at very low power levels, which means the signals don't go far.

"In radio you can usually trade range for rate," said Kahn. "If you are trying to go a long distance then (IEEE) 802.11a will perform better but once you get into (short) range then UWB is better."

The system demonstrated Friday was based on multiband UWB, which is a variant of the technology that is being backed by Intel and most other companies pursuing UWB research, said Kahn. The multiband version of the technology splits the 7.5 GHz of space over which UWB operates into a number of subbands.

The IDG News Service is a Network World affiliate.