Journal ArticleDOI
Superresolution of uncorrelated interference sources by using adaptive array techniques
G. Borgiotti,L. Kaplan +1 more
TLDR
In this article, an adaptive antenna array can achieve an angular resolution of uncorrelated interference sources substantially greater than the aperture of diffraction limit by using adaptive techniques, where the antenna beam is scanned over the interference source locations and for each scan condition the adaptive processor is allowed to reach its steady state.Citations
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Journal ArticleDOI
An introduction to multisensor data fusion
David L. Hall,James Llinas +1 more
TL;DR: This paper provides a tutorial on data fusion, introducing data fusion applications, process models, and identification of applicable techniques.
Journal ArticleDOI
Parameter estimation of superimposed signals using the EM algorithm
Meir Feder,E. Weinstein +1 more
TL;DR: A computationally efficient algorithm for parameter estimation of superimposed signals based on the two-step iterative EM (estimate-and-maximize, with an E step and an M step) algorithm is developed.
Journal ArticleDOI
An overview of matched field methods in ocean acoustics
TL;DR: In this paper, a short historical overview of matched field processing (MFP) is presented, followed by background material in both ocean acoustics and array processing needed for MFP.
Journal ArticleDOI
Fundamental limitations in antennas
TL;DR: In this article, four fundamental limitations in antennas have been identified in the areas of: electrically small antennas, super-directive antenna, superresolution antennas, and high-pin antennas.
Journal ArticleDOI
Reconstructing spatio-temporal activities of neural sources using an MEG vector beamformer technique
TL;DR: The authors have developed a method suitable for reconstructing spatio-temporal activities of neural sources by using magnetoencephalogram (MEG) data that extends the adaptive beamformer technique to incorporate the vector beamformer formulation in which a set of three weight vectors are used to detect the source activity in three orthogonal directions.
References
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Journal Article
Adaptive arrays
TL;DR: A method for adaptively optimizing the signal-to-noise ratio of an array antenna is presented and the relation of the adaptive array to sidelobe cancellation is shown, and a real-time adaptive implementation is discussed.
Journal ArticleDOI
Adaptive arrays with main beam constraints
S. Applebaum,D. Chapman +1 more
TL;DR: This paper examines the major techniques for constraining the response of the adaptive processor, including methods of controlling the Response of the array in the absence of external interference, including angle domain techniques such as pilot signals, preadaption spacial filtering, and control loop spatial filtering.
Journal ArticleDOI
A comparison of adaptive algorithms based on the methods of steepest descent and random search
Bernard Widrow,J.M. McCool +1 more
TL;DR: This paper compares the performance characteristics of three algorithms useful in adjusting the parameters of adaptive systems: the differential (DSD) and least-mean-square (LMS) algorithms, both based on the method of steepest descent, and the linear random search (LRS) algorithm, based on a random search procedure derived from the Darwinian concept of "natural selection.
Journal ArticleDOI
The Toeplitz matrix: Its occurrence in antenna problems and a rapid inversion algorithm
TL;DR: A matrix inversion algorithm is presented which, by exploiting the unique symmetry properties of the Toeplitz matrix, specifies the inverse matrix elements in terms of recurrence relationships, so that computational time is proportional to the square of the matrix order rather than the cube.
Journal ArticleDOI
Optimal Adaptive Control of an Array of Passive Sensors
C. K. Lau,Cornelius T. Leondes +1 more
TL;DR: In this paper, a sensor array is treated as a spatial filter in rejecting undesired signals, and the array is governed by a control law derived from the noise covariance matrix supplied by the timevarying noise field in an optimal fashion.