Journal ArticleDOI
On the geometry of isotropic arrays
Ulku Baysal,Randolph L. Moses +1 more
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TLDR
This work considers array geometries whose direction-of-arrival (DOA) estimation performance is isotropic, and analyses the special case where a planar array is used to estimate the DOA of three-dimensional source.Abstract:
We consider array geometries whose direction-of-arrival (DOA) estimation performance is isotropic. An isotropic array is one whose Cramer-Rao bound (CRB) on the DOA of a single source is uniform for all angles. For both planar arrays and volume arrays we derive necessary and sufficient conditions on array element locations so that the array is isotropic. We also present several designs of isotropic planar and volume arrays. The results apply to both narrowband and wideband scenarios. We analyze the special case where a planar array is used to estimate the DOA of three-dimensional (3-D) source. Finally, we compare isotropic array performance to the best possible array performance.read more
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Book
Spectral analysis of signals
Petre Stoica,Randolph L. Moses +1 more
TL;DR: 1. Basic Concepts. 2. Nonparametric Methods. 3. Parametric Methods for Rational Spectra.
Journal ArticleDOI
Wideband Spectrum Sensing With Sub-Nyquist Sampling in Cognitive Radios
TL;DR: Multi-rate asynchronous sub-Nyquist sampling (MASS) is proposed for wideband spectrum sensing, and is an attractive approach for cognitive radio networks.
Proceedings ArticleDOI
An empirical study of collaborative acoustic source localization
TL;DR: This work implements an AML-based source localization algorithm, and uses it to localize marmot alarm-calls, and shows that the AML source localization algorithms can be used to localise actual animals in their natural habitat, using a platform that is practical to deploy.
Journal ArticleDOI
Dynamic Ultrasonic Hybrid Localization System for Indoor Mobile Robots
Seong Jin Kim,Byung Kook Kim +1 more
TL;DR: An accurate dynamic ultrasonic hybrid localization system is presented for autonomous navigation of indoor mobile robots using multiple ultrasonic distance measurements and an extended Kalman filter (EKF).
Journal ArticleDOI
Direction of Arrival Estimation Using Directive Antennas in Uniform Circular Arrays
TL;DR: Simulation results show improved DOA estimation accuracy and robustness using microstrip patch antennas as opposed to conventional dipoles and it is shown that the bandwidth of a UCA forDOA estimation is limited only by the broadband characteristics of the directional antenna elements and not by the electrical size of the array.
References
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Journal ArticleDOI
An L-shaped array for estimating 2-D directions of wave arrival
TL;DR: In this article, a simple structured 2-D array, the L-shaped array, is presented, which consists of two uniform linear arrays (ULA) connected orthogonally at one end of each ULA.
Journal ArticleDOI
Effects of sensor placement on acoustic vector-sensor array performance
M. Hawkes,Arye Nehorai +1 more
TL;DR: In this paper, the authors consider the role played by the sensor locations in the optimal performance of an array of acoustic vector sensors, and derive an expression for the Cramer-Rao bound on the azimuth and elevation of a single far-field source for an arbitrary acoustic vector-sensor array in a homogeneous wholespace.
Journal ArticleDOI
An algorithm for near-optimal placement of sensor elements
D. Pearson,S.U. Pillai,Y. Lee +2 more
TL;DR: Constructive procedures are developed to evaluate integer locations for an array of given sensors that span a prescribed distance, such that any missing integer is expressible as the difference of two sensor locations.
Journal ArticleDOI
Performance bounds for estimating vector systems
Arye Nehorai,Malcolm Hawkes +1 more
TL;DR: A unified framework for the analysis of estimators ofGeometrical vector quantities and vector systems through a collection of performance measures that have intuitive geometrical and physical interpretations, are independent of the coordinate reference frame, and are applicable to arbitrary parameterizations of the unknown vector or system of vectors.
Journal ArticleDOI
Array geometry for ambiguity resolution in direction finding
M. Gavish,Anthony J. Weiss +1 more
TL;DR: A measure of similarity between array response vectors is introduced and a tight lower bound of the similarity measure can be easily derived that can be used for selecting the best thinned array configuration from a given set of candidate geometries.