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A generalized approach to direction finding
IEEE Transactions on Acoustics, Speech, and Signal Processing, 1986With reference to the recently developed estimation of signal parameters using a rotational invariance techniques (ESPRIT) it is pointed out that other operators can be used to generate the matrix pencil. By way of example, the moving window operator is discussed. >
Hamza Ouibrahim +2 more
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Direction finding with a rotating antenna
2012 20th Signal Processing and Communications Applications Conference (SIU), 2012Finding the direction of the emitters is a problem to be solved in many areas. One of the methods used for that purpose is that using a rotating directional antenna and obtaining the direction estimate by processing the measured signal amplitudes. Direction estimation, in principle, is based on the own antenna pattern modulation on the measured signal.
Berkin Yildirim, Aydin Bayri, Gokhan Gok
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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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ACM Transactions on Algorithms, 2008
Consider a digraph with n vertices. For any fixed value k , we present linear- and almost-linear-time algorithms to find a cycle of length ≥ k , if one exists. We also find a cycle that has length ≥ log n /log log n in ...
Harold N. Gabow, Shuxin Nie
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Consider a digraph with n vertices. For any fixed value k , we present linear- and almost-linear-time algorithms to find a cycle of length ≥ k , if one exists. We also find a cycle that has length ≥ log n /log log n in ...
Harold N. Gabow, Shuxin Nie
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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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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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The Journal of the Acoustical Society of America, 2003
A method of determining the bearing of a source of a sonar signal comprising determining the phase of a cyclic variation of the output signal of a sonar detector having a directional characteristic which occurs as the orientation of the detector, and hence its characteristic, is rotated.
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A method of determining the bearing of a source of a sonar signal comprising determining the phase of a cyclic variation of the output signal of a sonar detector having a directional characteristic which occurs as the orientation of the detector, and hence its characteristic, is rotated.
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