Fundamental limits on time delay estimation in dispersed spectrum cognitive radio systems

Sinan Gezici; Hasari Celebi; H. Vincent Poor; Huseyin Arslan

doi:10.1109/T-WC.2009.080104

Fundamental limits on time delay estimation in dispersed spectrum cognitive radio systems

Sinan Gezici
, Hasari Celebi
, H. Vincent Poor
, Huseyin Arslan

Research output: Contribution to journal › Article › peer-review

41 Scopus citations

Abstract

In this paper, fundamental limits on time delay estimation are studied for cognitive radio systems, which facilitate opportunistic use of spectral resources. First, a generic Cramer-Rao lower bound (CRLB) expression is obtained in the case of unknown channel coefficients and carrier-frequency offsets (CFOs) for cognitive radio systems with dispersed spectrum utilization. Then, various modulation schemes are considered, and the effects of unknown channel coefficients and CFOs on the accuracy of time delay estimation are quantified. Finally, numerical studies are performed in order to verify the theoretical analysis.

Original language	English (US)
Article number	4786484
Pages (from-to)	78-83
Number of pages	6
Journal	IEEE Transactions on Wireless Communications
Volume	8
Issue number	1
DOIs	https://doi.org/10.1109/T-WC.2009.080104
State	Published - Jan 2009
Externally published	Yes

All Science Journal Classification (ASJC) codes

Computer Science Applications
Electrical and Electronic Engineering
Applied Mathematics

Keywords

Carrier frequency offset (CFO)
Cognitive radio
Cramer-Rao lower bound (CRLB)
Dispersed spectrum utilization
Time delay estimation

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10.1109/T-WC.2009.080104

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title = "Fundamental limits on time delay estimation in dispersed spectrum cognitive radio systems",

abstract = "In this paper, fundamental limits on time delay estimation are studied for cognitive radio systems, which facilitate opportunistic use of spectral resources. First, a generic Cramer-Rao lower bound (CRLB) expression is obtained in the case of unknown channel coefficients and carrier-frequency offsets (CFOs) for cognitive radio systems with dispersed spectrum utilization. Then, various modulation schemes are considered, and the effects of unknown channel coefficients and CFOs on the accuracy of time delay estimation are quantified. Finally, numerical studies are performed in order to verify the theoretical analysis.",

keywords = "Carrier frequency offset (CFO), Cognitive radio, Cramer-Rao lower bound (CRLB), Dispersed spectrum utilization, Time delay estimation",

author = "Sinan Gezici and Hasari Celebi and Poor, \{H. Vincent\} and Huseyin Arslan",

note = "Funding Information: H. V. Poor is with the Department of Electrical Engineering, Princeton University, Princeton, NJ 08544, USA (e-mail: [email protected].) This work was supported in part by the European Commission in the framework of the FP7 Network of Excellence in Wireless COMmunications NEWCOM++ (contract no. 216715), and in part by the U. S. National Science Foundation under Grants ANI-03-38807 and CNS-06-25637. Digital Object Identifier 10.1109/T-WC.2009.080104 Copyright: Copyright 2009 Elsevier B.V., All rights reserved.",

year = "2009",

month = jan,

doi = "10.1109/T-WC.2009.080104",

language = "English (US)",

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AU - Gezici, Sinan

AU - Celebi, Hasari

AU - Poor, H. Vincent

AU - Arslan, Huseyin

N1 - Funding Information: H. V. Poor is with the Department of Electrical Engineering, Princeton University, Princeton, NJ 08544, USA (e-mail: [email protected].) This work was supported in part by the European Commission in the framework of the FP7 Network of Excellence in Wireless COMmunications NEWCOM++ (contract no. 216715), and in part by the U. S. National Science Foundation under Grants ANI-03-38807 and CNS-06-25637. Digital Object Identifier 10.1109/T-WC.2009.080104 Copyright: Copyright 2009 Elsevier B.V., All rights reserved.

PY - 2009/1

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N2 - In this paper, fundamental limits on time delay estimation are studied for cognitive radio systems, which facilitate opportunistic use of spectral resources. First, a generic Cramer-Rao lower bound (CRLB) expression is obtained in the case of unknown channel coefficients and carrier-frequency offsets (CFOs) for cognitive radio systems with dispersed spectrum utilization. Then, various modulation schemes are considered, and the effects of unknown channel coefficients and CFOs on the accuracy of time delay estimation are quantified. Finally, numerical studies are performed in order to verify the theoretical analysis.

AB - In this paper, fundamental limits on time delay estimation are studied for cognitive radio systems, which facilitate opportunistic use of spectral resources. First, a generic Cramer-Rao lower bound (CRLB) expression is obtained in the case of unknown channel coefficients and carrier-frequency offsets (CFOs) for cognitive radio systems with dispersed spectrum utilization. Then, various modulation schemes are considered, and the effects of unknown channel coefficients and CFOs on the accuracy of time delay estimation are quantified. Finally, numerical studies are performed in order to verify the theoretical analysis.

KW - Carrier frequency offset (CFO)

KW - Cognitive radio

KW - Cramer-Rao lower bound (CRLB)

KW - Dispersed spectrum utilization

KW - Time delay estimation

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ER -

Fundamental limits on time delay estimation in dispersed spectrum cognitive radio systems

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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