Performance limits on ranging with cognitive radio
Date
2009-06
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Source Title
Proceedings - 2009 IEEE International Conference on Communications Workshops, ICC 2009
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Publisher
IEEE
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1 - 5
Language
English
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Abstract
Cognitive radio is a promising paradigm for efficient utilization of the radio spectrum due to its capability to sense environmental conditions and adapt its communication and localization features. In this paper, the theoretical limits on time-of-arrival estimation for cognitive radio localization systems are derived in the presence of interference. In addition, an optimal spectrum allocation strategy which provides the best ranging accuracy limits is proposed. The strategy accounts for the constraints from the sensed interference level as well as from the regulatory emission mask. Numerical results are presented to illustrate the improvements that can be achieved by the proposed approach. © 2009 IEEE.
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Keywords
Cognitive radio , Interference , Orthogonal frequency division multiplexing (OFDM) , Ranging , Time-of-arrival (TOA) estimation , Ultra-wideband (UWB) , Cognitive systems , Estimation , Evolutionary algorithms , Frequency allocation , Frequency division multiple access , Frequency estimation , Multiplexing , Radio , Radio systems , Technical presentations , Wireless telecommunication systems