Realtek Demonstrates Ultra-Wideband Detect-And-Avoid Technology at WiMedia Open House in Brussels


First industry demonstration of cognitive radio functionality that meets upcoming global requirements for wireless coexistence in the 4.2~4.8GHz band

HSINCHU, Taiwan and IRVINE, Calif. – February 21, 2007 –  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.”

About the RTU7010
The RTU7010 implements all communications-related modes of the WiMedia PHY 1.1 standard in the 3.168~4.752 GHz band, both mandatory and optional, including eight data rates, from 53.3 to 480Mbps, and all fixed-frequency and frequency-hopped channels, along with many proprietary detect-and-avoid features for managing coexistence with other wireless technologies. The standardized WiMedia MAC-PHY Interface 1.0 is also supported. The chip integrates a digital baseband processor with two full radio chains, along with the circuitry for optimal combination of the two radio inputs, and fits in a 7mm x 7mm package. The RTU7010 and RTU7010-EVK evaluation kit are currently available. For more information on Realtek's UWB products, visit

About Realtek
Realtek Semiconductor Corp. is one of the world's leading IC providers. It designs and develops a wide range of IC products for communications network, computer peripheral, and multimedia applications. Products include 10/100/1000M Ethernet Controllers, 10/100/1000M Ethernet Switch/Gateway Controllers, 10/100/1000M Ethernet PHYceivers, Wireless LAN Controllers & AP/Router SoCs, ADSL2+ Chips, VoIP Solutions, Ultra-Wideband Chips, AC'97/High Definition Audio Codecs, Clock Generators, Card Reader Controllers, and LCD Monitor/LCD TV/DTV Controllers. With advanced design expertise in RF, analog, and mixed signal circuits, and with strong manufacturing and system knowledge, Realtek offers full-featured, high-performance, and competitive total solutions. More information on Realtek can be found on the website:

Editorial Contacts