Time delay estimation in cognitive radio systems

Author

Kocak, Fatih ; Celebi, Hasari ; Gezici, Sinan ; Qaraqe, Khalid A. ; Arslan, Huseyin ; Poor, H. Vincent

Author_Institution

Dept. of Electr. & Electron. Eng., Bilkent Univ., Bilkent, Turkey

fYear

2009

fDate

13-16 Dec. 2009

Firstpage

400

Lastpage

403

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.

Keywords

cognitive radio; communication complexity; delays; maximum likelihood estimation; cognitive radio systems; computational complexity; optimal maximum likelihood time delay estimation; time delay estimation; two-step time delay; Bandwidth; Cognitive radio; Computational complexity; Computational modeling; Delay effects; Delay estimation; Frequency diversity; Frequency estimation; Maximum likelihood estimation; USA Councils; Cognitive radio; Cramer-Rao lower bound; diversity; maximum-likelihood; time delay estimation;

fLanguage

English

Publisher

ieee

Conference_Titel

Computational Advances in Multi-Sensor Adaptive Processing (CAMSAP), 2009 3rd IEEE International Workshop on

Conference_Location

Aruba, Dutch Antilles

Print_ISBN

978-1-4244-5179-1

Electronic_ISBN

978-1-4244-5180-7

Type

conf

DOI

10.1109/CAMSAP.2009.5413247

Filename

5413247