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Improving the Resolution of Bearing in Passive Sonar Arrays by Eigenvalue Analysis
Don H. Johnson,Stuart DeGraaf +1 more
- Iss: 8102
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TLDR
In this paper, an adaptive beamforming method is proposed to improve the bearing resolution of a passive array, having many similarities to the minimum energy approach, where the evaluation of energy in each steered beam is preceded by an eigenvalue-eigenvector analysis of the empirical correlation matrix.Abstract:
A method of improving the bearing-resolving capabilities of a passive array is discussed. This method is an adaptive beamforming method, having many similarities to the minimum energy approach. The evaluation of energy in each steered beam is preceded by an eigenvalue-eigenvector analysis of the empirical correlation matrix. Modification of the computations according to the eigenvalue structure results in improved resolution of the bearing of acoustic sources. The increase in resolution is related to the time-bandwidth product of the computation of the correlation matrix. However, this increased resolution is obtained at the expense of array gain.read more
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SAR Imaging via Modern 2-D Spectral Estimation Methods. Volume 1. Imaging Methods.
TL;DR: In this article, a comprehensive comparison of 2D spectral estimation methods for SAR imaging is presented, and a theoretical analysis of the impact of the adaptive sidelobe reduction (ASR) algorithm on target to clutter ratio is provided.
Proceedings ArticleDOI
A New Criterion For The Determination Of The Number Of Signals In High-Resolution Array Processing
TL;DR: A new criterion is proposed here such that a new likelihood function is derived consisting of only the parameters having bearing to the determination of K and computer simulations indicate that considerable improvement in performance is attained.
Proceedings ArticleDOI
Estimation algorithm for determining angular position of the radiation sources for antenna array with errors
Yu K. Vyboldin,S. V. Borisov +1 more
TL;DR: The influence of errors in the signal model using the methods of estimating the spatial spectrum of the input field of the antenna array is investigated and it is shown that the eigenvectors of the matrix of the mutual power spectral density of the sum of the signals and noise can differ significantly from each other.
Proceedings ArticleDOI
High-power interference suppression via reduced complexity adaptive blind beamforming
Garret Okamoto,Chih-Wei Chen +1 more
TL;DR: Simulations show that ABB automatically nulls jamming signals that are 20 dB to 40 dB stronger than the user signal, achieving close to the theoretically best performance despite being a blind solution and its low computational requirements.
References
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Mostafa Kaveh,A. Barabell +1 more
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