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An L-shaped Array with Non-Orthogonal Axes – Its Cramer-Rao Bound for Direction Finding
(IEEE, 2017-08)
If a nominally L-shaped sensor-array's two legs are not exactly perpendicular, its azimuth-polar direction-of-arrival estimation would be degraded. This paper quantifies this degradation via a deterministic Cramér-Rao ...
Direction Finding with the Sensors' Gains Suffering Bayesian Uncertainty — Hybrid CRB and MAP Estimation
(IEEE, 2016-08)
The paper analyzes how a sensor array's direction-finding accuracy may be degraded by any stochastic uncertainty in the sensors' complex value gains, modeled here as complex value Gaussian random variables. This analysis ...
A uniform circular array of isotropic sensors that stochastically dislocate in three dimensions—The hybrid Cramer-Rao bound of direction-of-arrival estimation
(Acoustical Society of America, 2019-07)
An array’s constituent sensors could be spatially dislocated from their nominal positions. This
paper investigates how such sensor dislocation would degrade a uniform circular array (UCA) of
isotropic sensors (like ...
Hybrid Cram er-Rao bound of direction finding, using a triad of cardioid sensors that are perpendicularly oriented and spatially collocated
(Acoustical Society of America, 2019-07)
Cardioid microphones/hydrophones are highly directional acoustical sensors, which enjoy easy
availability via numerous commercial vendors for professional use. Collocating three such cardioids
in orthogonal orientation ...
A Lower Bound of Estimation Error of an Emitter's Direction-of-Arrival / Polarization, for a Collocated Triad of Orthogonal Dipoles/Loops That Fail Randomly
(2017-04)
For a triad of short dipoles (or of small loops), in perpendicular orientation relative to each other but collocated in
space, this study derives a lower bound for their error in direction-of-arrival estimation and ...
A uniform circular array of isotropic sensors that stochastically dislocate in three dimensions—The hybrid Cramér-Rao bound of direction-of-arrival estimation
(2019-07)
An array’s constituent sensors could be spatially dislocated from their nominal positions. This
paper investigates how such sensor dislocation would degrade a uniform circular array (UCA) of
isotropic sensors (like ...
Three-dimensional dislocations in a uniform linear array's isotropic sensors-Direction finding's hybrid Cramér-Rao bound
(Acoustical Society of America, 2020-05)
The linear array’sone-dimensional spatial geometry is simple but suffices forunivariate direction finding, i.e., isadequate for the estimation of an incident source’s direction-of-arrival relative to the linear ...
Comparing the “Rim” Versus the “Filled” Rectangular Array Grids—Their Direction-Finding Cramér-Rao Bounds
(IEEE, 2018)
A rectangular array of sensors is often used in direction finding, due to the geometric regularity in its spatial rectangular grid. The sensor positions may be confined to the rectangle's perimeter (as in a “rim” array), ...
The hybrid Cramer-Rao bound of direction finding by a uniform circular array of isotropic sensors that suffer stochastic dislocations
(Acoustical Society of America, 2017-11-15)
Consider azimuth-elevation direction finding by a uniform circular array of isotropic sensors. In the real world, the sensors may dislocate from their nominal positions. These dislocations could be modeled as random variables ...
A Centrosymmetric Array Comprising a Horizontal Uniform Circular Subarray and a Vertical Uniform Linear Subarray—Its Design in Reference to Its Direction-Finding Cramér–Rao Bound.
(IEEE, 2021-06)
Azimuthal centrosymmetry in an array grid is typically associated with arrays that are circular, concentric, cylindrical, spherical, or hemispherical. However, a recently proposed alternative combines an azimuthal circular ...