Performance and Cramer-Rao Bounds for DoA/RSS Estimation and Transmitter Localization Using Sectorized Antennas

被引：52

作者：

Werner, Janis ^{[1
]}

Wang, Jun ^{[2
]}

Hakkarainen, Aki ^{[1
]}

Cabric, Danijela ^{[3
]}

Valkama, Mikko ^{[1
]}

机构：

[1] Tampere Univ Technol, Dept Elect & Commun Engn, FIN-33101 Tampere, Finland

[2] Broadcom Corp, Irvine, CA 92617 USA

[3] Univ Calif Los Angeles, Dept Elect Engn, Los Angeles, CA 90095 USA

来源：

IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY | 2016年 / 65卷 / 05期

基金：

美国国家科学基金会;

关键词：

Angle of arrival; cognitive radio (CR); Cramer-Rao bounds (CRBs); directional antennas; direction-of-arrival estimation; leaky-wave antennas (LWAs); localization; received signal strength (RSS); reconfigurable antennas; sectorized antennas; single radio-frequency front end; COGNITIVE RADIO NETWORKS; LOCATION; PARAMETERS; ALGORITHMS;

D O I：

10.1109/TVT.2015.2445317

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：

Using collaborative sensors or other observing devices equipped with sectorized antennas provides a practical and low-cost solution to direction-of-arrival (DoA) and received signal strength (RSS) estimation, as well as noncooperative transmitter (TX) localization. In this paper, we study the performance and theoretical bounds of DoA/RSS estimation and localization using sectorized antennas. We first show that the sector-power measurements at an individual sensor form a sufficient statistic for DoA/RSS estimation and TX localization. Motivated by that, we then derive the Cramer-Rao bound (CRB) on DoA/RSS estimation based on sector-powers and study its asymptotic behavior. Moreover, we derive an analytical expression for the mean square error (MSE) of a practical sectorized-antenna-based DoA estimator, compare its performance to the derived CRB, and study its asymptotic properties. Next, we derive the CRB for localization based on sector-powers. The resulting CRB is a lower bound for a localization system where the DoA/RSS estimates, obtained from sector-powers at individual sensors, are fused together into a location estimate. Moreover, the CRB also covers the more general case of a localization system where the sector-powers from individual nodes are directly fused together, without an intermediate DoA/RSS estimation step. We compare the obtained CRB to a localization approach employing an intermediate DoA/RSS estimation step and observe that skipping this intermediate processing step may result in a substantially improved localization performance. Finally, we study the influence of various important system parameters, such as the number of sensors, sectors, and measurement samples, on the achievable estimation and localization performance. Overall, this paper demonstrates and quantifies the achievable DoA/RSS estimation and localization performance of sectorized antennas and provides comprehensive design guidelines for sector-power based low-complexity localization systems.

引用

页码：3255 / 3270

页数：16

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