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

被引：16

作者：

Karisan, Yasir ^{[1
]}

Dardari, Davide ^{[2
]}

Gezici, Sinan ^{[3
]}

D'Amico, Antonio A. ^{[4
]}

Mengali, Umberto ^{[4
]}

机构：

[1] Ohio State Univ, Dept Elect & Comp Engn, Columbus, OH 43210 USA

[2] Univ Bologna Cesena, WiLAB DEIS, I-47023 Cesena, FC, Italy

[3] Bilkent Univ, Dept Elect & Elect Engn, TR-06800 Ankara, Turkey

[4] Univ Pisa, Dept Informat Engn, Pisa, Italy

来源：

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS | 2011年 / 10卷 / 10期

关键词：

Ranging; time-of-arrival (TOA) estimation; interference; orthogonal frequency division multiplexing (OFDM); Cramer-Rao bound (CRB); cognitive radio; FUNDAMENTAL LIMITS; CHANNEL ESTIMATION; COGNITIVE RADIO; TIME; LOCALIZATION;

D O I：

10.1109/TWC.2011.072511.101844

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

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.

引用

页码：3321 / 3331

页数：11

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