Range Estimation in Multicarrier Systems in the Presence of Interference: Performance Limits and Optimal Signal Design

Author

Karisan, Yasir ; Dardari, Davide ; Gezici, Sinan ; D´Amico, Antonio A. ; Mengali, Umberto

Author_Institution

Dept. of Electr. & Comput. Eng., Ohio State Univ., Columbus, OH, USA

Volume

10

Issue

10

fYear

2011

fDate

10/1/2011 12:00:00 AM

Firstpage

3321

Lastpage

3331

Abstract

Theoretical limits on time-of-arrival (equivalently, range) estimation are derived for multicarrier systems in the presence of interference. Specifically, closed-form expressions are obtained for Cramer-Rao bounds (CRBs) in various scenarios. In addition, based on CRB expressions, an optimal power allocation (or, spectrum shaping) strategy is proposed. This strategy considers the constraints not only from the sensed interference level but also from the regulatory emission mask. Numerical results are presented to illustrate the improvements achievable with the optimal power allocation scheme, and a maximum likelihood time-of-arrival estimation algorithm is studied to assess the effects of the proposed approach in practical estimators.

Keywords

cognitive radio; interference suppression; maximum likelihood estimation; radiofrequency interference; time-of-arrival estimation; CRB; Cramer-Rao bound; closed-form expression; cognitive radio; maximum likelihood time-of-arrival estimation algorithm; multicarrier interference system; optimal power allocation scheme; optimal signal design; range estimation; regulatory emission mask; Accuracy; Estimation; Interference; OFDM; Optimized production technology; Resource management; Time of arrival estimation; Cramer-Rao bound (CRB); Ranging; cognitive radio; interference; orthogonal frequency division multiplexing (OFDM); time-of-arrival (TOA) estimation;

fLanguage

English

Journal_Title

Wireless Communications, IEEE Transactions on

Publisher

ieee

ISSN

1536-1276

Type

jour

DOI

10.1109/TWC.2011.072511.101844

Filename

5967986