Evaluation of cooperative techniques in an interworking UWB-UMTS platform

Low power spectral density of UWB (ultra wideband) systems allows spectrum reutilization, but harmless coexistence with other radio systems must be guaranteed. Regulation establishes limits to emitted power spectral density necessary to assure that UWB devices do not interfere with any other radio devices nearby. But coexistence between UWB and other radio service collocated in the same device must be assured by the manufacturer, which is usually a design challenge. This paper presents cooperative techniques as an alternative to improve protection over possible victim services when UWB and other radio service are collocated in the same device. Different detection and protection methods are proposed and implemented on a UWB/UMTS interworking platform. Possible degradation on UWB link due to protection methods is evaluated and the whole platform performance is tested through a measurement campaign.