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Publication Date

Spring 2013

Degree Type

Thesis - Campus Access Only

Degree Name

Master of Science (MS)

Department

Electrical Engineering

Advisor

Birsen Sirkeci-Mergen

Keywords

localization, multiband, optimal detection, spectrum

Subject Areas

Electrical engineering

Abstract

Recent attention in cognitive radio applications has created interest in developing strategies for detecting and localizing primary users in order for secondary users to utilize empty spectrum bands. The contribution of this thesis was to use localization receiver operating characteristic (ROC) curves to define and evaluate the performance of optimal decision strategies for multiband spectrum localization.

First, the localization ROC (LROC), the Free Response ROC (FROC), and Alternate Free Response ROC (AFROC) are defined. The LROC is used for single primary decision strategies, while the FROC and AFROC are used for multiple primary decision strategies. Second, optimal decision strategies that maximize the localization performance of each respective curve are derived and compared to suboptimal decision strategies. Each optimal decision strategy is derived to maximize the area under the respective curve. The localization ROCs performed well in evaluating the performance of the decision strategies. As expected, the optimal decision strategies provide better localization performance than the suboptimal strategies.

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