UWB coexistence and cognitive radio

The recent history of Ultrawideband communications technology has seen great debate over whether these UWB cause unacceptable interference to existing users of the same and nearby bands. Building on the IEEE 802.15.2 Recommended Practice and the framework developed by IEEE 802.19, researchers are developing techniques to separate UWB signals for others using time, frequency, power, space, and coding, the five techniques available to minimize interference and maximize capacity. This paper explores general methods for using these parameters either to eliminate interference, or to achieve graceful, deterministic degradation. It concludes with next steps for bringing these techniques into the standards process.