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A parametric direction finding technique
ICASSP '87. IEEE International Conference on Acoustics, Speech, and Signal Processing, 2005The fundamental signal model for narrowband direction finding - the propagation of several sinusoidal planar wavefronts in a medium containing an array of sensors with additive Gaussian noise present - is assumed implicitly in most high resolution beamforming algorithms.
Darel A. Linebarger, Don H. Johnson
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Finding Dominators in Directed Graphs
SIAM Journal on Computing, 1974This paper describes an algorithm for finding dominators in an arbitrary directed graph. The algorithm uses depth-first search and efficient algorithms for computing disjoint set unions and manipulating priority queues to achieve a time bound of $O(V\log V + E)$ if V is the number of vertices and E is the number of edges in the graph.
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A robust estimator for direction finding
[Proceedings] ICASSP 91: 1991 International Conference on Acoustics, Speech, and Signal Processing, 1991Among high-resolution direction-of-arrival (DOA) estimators, it is known that the maximum likelihood estimation (MLE) has the most desirable performance in resolution. However, when the SNR falls below a certain threshold, its performance degrades considerably.
Qiang Wu 0006, Kon Max Wong
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Decoupled direction finding: detection
Proceedings of the 1998 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP '98 (Cat. No.98CH36181), 2002Antenna arrays are likely to be an important feature of future mobile communication systems. With an antenna array, mobile users can be separated by a spatial filtering procedure allowing several users on the same carrier frequency. The uplink part (mobile to base) not only can, but is better solved without using any spatial knowledge in terms of ...
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Finding the direction of a sound
The Journal of the Acoustical Society of America, 1986An arrangement for finding the direction of a sound in a medium has a thin shell structure having a circular symmetry. The structure can flex in response to incident sound energy from the medium to perturb the form of the structure. A membrane of a piezo-electric material with an anisotropic piezo-electric response to distortion is arranged to be ...
Philip G. Harper +3 more
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Conference Record of the Thirty-Eighth Asilomar Conference on Signals, Systems and Computers, 2004., 2005
This paper considers the problem of estimating directions of arrival (DOAs) from sensor-array data when the positions of the sensors are not precisely known. The proposed algorithm is an extension of a previously developed approach based on weighted subspace fitting.
Vaccaro, Richard J., Owsley, Norman L.
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This paper considers the problem of estimating directions of arrival (DOAs) from sensor-array data when the positions of the sensors are not precisely known. The proposed algorithm is an extension of a previously developed approach based on weighted subspace fitting.
Vaccaro, Richard J., Owsley, Norman L.
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Direction findings on whistlers
Journal of Geophysical Research, 1959Efforts to study the direction of arrival and polarization of whistlers have led to confusion, presumably because of the complexity of the signals and their transient behavior. This letter describes one technique which shows promise in that it has given results on the direction of some whistlers.
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Finding the illuminant direction
Journal of the Optical Society of America, 1982Shading is important for estimation of three-dimensional shape from the two-dimensional image, for instance, for distinguishing between the smooth occluding contour generated by the edge of a sphere and the sharp occluding contour generated by the edge of a disk.
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DIRECTION FINDING OF ATMOSPHERICS
Canadian Journal of Research, 1935The results of one summer's observation with a cathode ray direction finder and an automatic recorder to locate the bearings of atmospherics are given and discussed.It appears that storm areas or areas of low barometric pressure are responsible for many of the observed atmospherics.
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Aircraft Engineering and Aerospace Technology, 1930
THE art of navigating any mobile craft depends essentially on being able to determine the position of that craft with relation to a fixed point or points; the position may either be obtained in the form of a bearing on, and a distance from, any known fixed point, or of simultaneous bearings from two or more fixed points, which bearings are laid off on ...
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THE art of navigating any mobile craft depends essentially on being able to determine the position of that craft with relation to a fixed point or points; the position may either be obtained in the form of a bearing on, and a distance from, any known fixed point, or of simultaneous bearings from two or more fixed points, which bearings are laid off on ...
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