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Wideband DOA estimation for nonuniform linear arrays with Wiener array interpolation

Wideband DOA estimation for nonuniform linear arrays with Wi...

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sensor array and multichannel signal processing workshop

作者： T. Kaya Yasar T. Engin Tuncer Electrical and Electronics Engineering Department M.E.T.U. Ankara Turkey

Coherent wideband DOA estimation for non-uniform linear arrays (NLA) is considered. array interpolation is used for two mappings. In the first mapping, NLA is mapped to a uniform linear array with the same array aperture. In the second mapping covariance matrices for each frequency bin are mapped to a single one at the center frequency for coherent DOA estimation. A Wiener formulation is used for array interpolation where both signal and noise powers are estimated with maximum likelihood method. Different approaches are compared and the advantages of wideband processing versus narrowband processing are outlined. The accuracy of the SNR estimation is high and it is shown that Wiener array interpolation significantly improves the DOA estimation performance in both narrowband and wideband processing.

关键词： Interpolation Wideband Direction of arrival estimation Covariance matrix signal to noise ratio array signal processing Estimation

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Uniform and nonuniform V-shaped isotropic planar arrays

Uniform and nonuniform V-shaped isotropic planar arrays

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sensor array and multichannel signal processing workshop

作者： Tansu Filik T. Engin Tuncer Department Electrical and Electronics Engineering Middle East Technical University Ankara Turkey

In this study, isotropic V-shaped uniform and nonuniform arrays are considered. An isotropic array has the same value for the Cramer-Rao bound (CRB) for all direction of arrival (DOA) angles. The conditions for isotropic V-shaped arrays are presented and closed form expressions for V-shaped uniform and nonuniform arrays are found. These expressions return the V-angle for the array. Therefore, given the number of sensors and sensor displacements, isotropic performance V-angle can be found easily. V-shaped arrays are compared with circular arrays and it is also shown that both uniform and nonuniform V-shaped arrays have certain advantages.

关键词： arrays sensors Azimuth Estimation Direction of arrival estimation sensor arrays Geometry

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Robust presteered broadband beamforming based on worst-case performance optimization

Robust presteered broadband beamforming based on worst-case ...

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sensor array and multichannel signal processing workshop

作者： Michael Rubsamen Alex B. Gershman Communication Systems Group Technische Universität Darmstadt Darmstadt Germany

In this paper, two robust presteered broadband (PB) beamformers are developed using worst-case designs. The proposed techniques are shown to enjoy a reduced computational complexity and/or significant performance improvements as compared to the existing robust wideband beamforming techniques in scenarios with array response errors.

关键词： Robustness array signal processing arrays Transfer functions signal to noise ratio Complexity theory Upper bound

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Localization of diffracted seismic noice source using an array of seismic sensors

Localization of diffracted seismic noice source using an arr...

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sensor array and multichannel signal processing workshop

作者： Necati Gulunay CGGVeritas Research and Development Cairo Egypt

Seismic receiver arrays that are used in modern 3D marine surveys can also be used as 2D sensor arrays in the localization of the diffracted noise sources and hence allow attenuation of such noise from the seismic rec... 详细信息

关键词： Noise Receivers Diffraction Three dimensional displays arrays Imaging Earth

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PERFORMANCE ANALYSIS OF ROOT-MUSIC-BASED DIRECTION-OF-ARRIVAL ESTIMATION FOR ARBITRARY NON-UNIFORM arrayS

PERFORMANCE ANALYSIS OF ROOT-MUSIC-BASED DIRECTION-OF-ARRIVA...

引用

2008 ieee sensor array and multichannel signal processing workshop

作者： Michael Rubsamen Alex B. Gershman Communication Systems Group Technische Universität Darmstadt Darmstadt Germany

We present the asymptotic performance analysis of the interpolated root-MUSIC and manifold separation (MS) techniques for direction-of-arrival (DOA) estimation in arbitrary non-uniform sensor arrays. Our analysis take... 详细信息

关键词： Direction-of-arrival estimation Non-uniform sensor arrays Root-MUSIC sensor array processing

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BEAMSPACE ADAPTIVE BEAMFORMING BASED ON PRINCIPLE COMPONENT ANALYSIS

BEAMSPACE ADAPTIVE BEAMFORMING BASED ON PRINCIPLE COMPONENT ...

引用

2008 ieee sensor array and multichannel signal processing workshop

作者： Lei Yu Wei Liu Richard Langley Communications Research Group Department of Electronic and Electrical Engineering University of Sheffield UK

A novel adaptive beamforming method is proposed without the knowledge of the direction of arrival of the signal of interest. It is a combination of the traditional beamspace processing method and a recently proposed technique called "Domain Weighted Principal Component Analysis (DW-PCA)" and can be applied to the case where the signal of interest is stronger than the interfering signals in both single-path and multi-path environments. Its effectiveness is verified by simulation results.

关键词： Adaptive systems array signal processing Multipath channels

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EFFICIENT DESIGN OF FREQUENCY INVARIANT BEAMFORMERS WITH sensor DELAY-LINES

EFFICIENT DESIGN OF FREQUENCY INVARIANT BEAMFORMERS WITH SEN...

引用

2008 ieee sensor array and multichannel signal processing workshop

作者： Yong Zhao Wei Liu Richard J. Langley Communications Research Group Department of Electronic and Electrical Engineering University of Sheffield UK

The design of frequency invariant beamformers for traditional tapped delay-line array system can be formulated as a convex optimization problem and solved efficiently using the interior-point methods. This approach is extended to the recently proposed broadband beamforming system with sensor delay-lines and some variations are proposed to cope with the specific requirements in the design. Design examples are provided to show the effectiveness of the proposed method.

关键词： Frequency invariant beamformer sensor delay-line Convex optimization

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POWER-AWARE DISTRIBUTED DETECTION IN IR-UWB sensor NETWORKS

POWER-AWARE DISTRIBUTED DETECTION IN IR-UWB SENSOR NETWORKS

引用

2008 ieee sensor array and multichannel signal processing workshop

作者： Daniel Bielefeld Gernot Fabeck Rudolf Mathar Institute of Theoretical Information Technology RWTH Aachen University Aachen Germany

The interplay between signal processing and wireless networking plays a crucial role in sensor networks deployed for detection and estimation applications. In this paper, an opportunistic power assignment strategy for IR-UWB sensor networks is presented which is designed to optimize detection performance in terms of the global probability of error. The opportunistic power assignment strategy utilizes both the detection error probabilities of individual sensors as well as network topology information, leading to significant performance gains compared to uniform power assignment.

关键词： Interference signal to noise ratio Wireless sensor networks Wireless communication Noise Transceivers Upper bound

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A BLIND array CALIBRATION ALGORITHM USING A MOVING SOURCE

A BLIND ARRAY CALIBRATION ALGORITHM USING A MOVING SOURCE

引用

2008 ieee sensor array and multichannel signal processing workshop

作者： Georgios Efstathopoulos Athanassios Manikas Department of Electrical & Electronic Engineering Imperial College London UK

This paper is concerned with the problem of antenna array calibration in a non-stationary signal environment. In detail, this study focuses on calibration of the antenna array geometry by employing properties of the differential geometry of the array manifold vector. The proposed algorithm is totally blind, since the only available information to the array system is the received signal emitted by a moving source of unknown characteristics. The only assumption made is that the movement of the source has an angular component and that the position of one sensor with regards to the reference point is known. It is shown through Monte Carlo simulations that this method significantly improves the ability of the array system to estimate characteristics of the moving source, such as its direction of arrival (DOA), in addition to reducing the positioning errors of the array elements.

关键词： arrays Calibration Estimation Geometry Music Direction of arrival estimation Manifolds

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A novel interpretation of Capon’s method in beam space

A novel interpretation of Capon’s method in beam space

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sensor array and multichannel signal processing workshop

作者： Hongya Ge Ivars P. Kirsteins Department of ECE New Jersey Institute of Technology Newark NJ USA Naval Undersea Warfare Center Newport RI USA

The paper introduces and provides a simple proof of an interesting matrix inversion identity involving subspaces. Using this identity, new insights and interpretations are provided about beam space-based adaptive beamformers and the generalized sidelobe canceller. In addition, system performance measures and losses in terms of the achievable SINR and deflection coefficient can be interpreted and predicted in beam space using the framework of subspaces.

关键词： Matrix decomposition Interference signal to noise ratio Covariance matrix arrays array signal processing Correlation

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