Time Delay Estimation in Cognitive Radio Systems

Details Time Delay Estimation in Cognitive Radio Systems Time Delay Estimation in Cognitive Radio Systems

2009-10-24

arxiv.org/abs/0910.4667v1

Computer Science

Information Theory

To appear at CAMSAP 2009

Scientific paper

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.

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