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Sensing Aware Design Approaches for Airborne Networks
Final rept. 1 Mar 2009 - 31 Dec 2011
WASHINGTON UNIV SEATTLE DEPT OF ELECTRICAL ENGINEERING
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Under-utilization of existing spectrum usage by licensed users is a well-known fundamental problem in current networks. A novel concept towards its amelioration is that of cognitive radio networks that allow usage of such un- or under- used spectrum by unlicensed or secondary users, provided they do not interfere with the incumbent or primary users. Clearly, an enabler of such opportunistic use is fast and accurate determination of primary user PUs channel status whether occupied or idle by secondary networks, as well as accurate modeling of patterns of spectrum occupancy by PUs that are dynamic in both time and frequency. In our work, we explore various options - algorithmic and architectural - towards optimizing the mean time to detect channel status subject to accuracy constraints. Finally, we also explored information theoretic results for a new cognitive interference channel that allows for multiple co-located secondary networks.
APPROVED FOR PUBLIC RELEASE