Time delay estimation in cognitive radio systems
Date
2009-12
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Source Title
3rd IEEE International Workshop on Computational Advances in Multi-Sensor Adaptive Processing, CAMSAP 2009
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Publisher
IEEE
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Pages
400 - 403
Language
English
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Abstract
In cognitive radio systems, secondary users can utilize multiple dispersed bands that are not used by primary users. In this paper, time delay estimation of signals that occupy multiple dispersed bands is studied. First, theoretical limits on time delay estimation are reviewed. Then, two-step time delay estimators that provide trade-offs between computational complexity and performance are investigated. In addition, asymptotic optimality properties of the two-step time delay estimators are discussed. Finally, simulation results are presented to explain the theoretical results. © 2009 IEEE.
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Keywords
Cognitive radio , Cramer-Rao lower bound , Diversity , Maximum-likelihood , Time delay estimation , Asymptotic optimality , Cognitive radio , Cramer Rao lower bound , ON time , Simulation result , Step time , Theoretical limits , Theoretical result , Time delay estimation , Cognitive systems , Computational complexity , Cramer-Rao bounds , Estimation , Maximum likelihood estimation , Radio , Radio systems , Sensors , Technical presentations , Time delay