RealTek Demos UWB Tech

HSINCHU, Taiwan and IRVINE, Calif. -- Realtek Semiconductor Corp., one of the world's largest IC design houses and a market leader in Ultra-Wideband (UWB) radio technology, will demonstrate cognitive radio functionality for ultra-wideband at the WiMedia Open House in Brussels, Belgium, on February 22. The demonstration uses Realtek's industry-leading RTU7010 combined single-chip radio and baseband processor, currently in mass production.

Realtek's cognitive radio functionality complies with the spectrum avoidance requirements that will apply in several worldwide regulatory domains beginning in 2009, and that are directed at ensuring satisfactory coexistence of ultra-wideband devices with other wireless services. The ultra-wideband transmitter responds to the presence of a protected service in its immediate vicinity by transmitting at a greatly reduced power level in a narrow band centered around the protected service. By tailoring the location and width of the spectral notch, interference-free coexistence with other services is ensured. The RTU7010 reduces the Power-Spectral Density (PSD) around the protected service to below -70dBm/MHz, while maintaining the maximum regulated limit of -41.3dBm/MHz elsewhere. This represents approximately a thousand-fold reduction in transmitted power around the protected service and meets the suppression level that will be required by regulators in Japan and Korea beginning in 2009 for devices operating in the 4.2~4.8GHz band.

Regulations addressing requirements for detection and for application of Detect-And-Avoid (DAA) technology to higher frequencies are currently under consideration in several regulatory domains.

"Detect-And-Avoid technology is the key to efficient use of wireless spectrum worldwide," said Turi Aytur, director of UWB products at Realtek. "The RTU7010 provides significant new functionality in this area."

Realtek Semiconductor Inc.