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检索条件"任意字段=2016 IEEE Sensor Array and Multichannel Signal Processing Workshop, SAM 2016"

共 1002 条记录，以下是31-40 订阅

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Preprocessing Algorithm for Source Localisation in a Multipath Environment

Preprocessing Algorithm for Source Localisation in a Multipa...

引用

8th ieee sensor array and multichannel signal processing workshop (sam)

作者： Venieris, Evangelos Manikas, Athanassios Univ London Imperial Coll Sci Technol & Med Dept Elect & Elect Engn Exhibit Rd London England

ISBN: (纸本)9781479914814

Several methods have been developed which allow the estimation of the location of an existing source with considerable accuracy in the absence of multipaths. However, if, in addition to the Line-of-Sight (LOS) path, non-LOS (NLOS) paths are also present, then all existing localisation algorithms dramatically fail to estimate the location of the source. In this paper, a passive array processing algorithm is proposed, which, if used prior to a localisation approach, suppresses all the multipath contributions in the received signal except for that of the LOS path. The performance of the proposed algorithm is evaluated through computer simulation studies.

关键词： array signal processing localisation multipath spherical wave propagation

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Mainlobe Deceptive Jammer Suppression with FDA-MIMO Radar 10

Mainlobe Deceptive Jammer Suppression with FDA-MIMO Radar

引用

10th ieee sensor array and multichannel signal processing workshop (sam)

作者： Xu, Jingwei Kang, Jialin Liao, Guisheng So, Hing Cheung Xidian Univ Natl Lab Radar Signal Proc Xian 710071 Shaanxi Peoples R China City Univ Hong Kong Hong Kong Hong Kong Peoples R China

ISBN: (纸本)9781538647523

Anti-jamming technique has become an increasing demand in radar systems due to the fast development of electronic countermeasures. To alleviate the extremely difficult deceptive jammer suppression problem, frequency diverse array (FDA) based multiple-input multiple-output (MIMO) radar is devised and a sample selection based deceptive jammer suppression method is developed. The basic principle of the FDA-MIMO radar regarding its superiority in canceling the deceptive jammers is studied in detail. In order to handle the pseudo-random distribution issue of false targets within the secondary training samples, a subspace projection based sample selection method is proposed. When certain a priori knowledge of the true target is available, the time-delayed false targets can be adequately suppressed, even if the latter are in the mainlobe direction. Simulation examples demonstrate the effectiveness of our solution.

关键词： Jamming array signal processing Delay effects Radar countermeasures Doppler radar"

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Time Evolution for Dynamic Probabilistic Tensors in Hierarchical Tucker Decomposition Form 10

Time Evolution for Dynamic Probabilistic Tensors in Hierarch...

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10th ieee sensor array and multichannel signal processing workshop (sam)

作者： Govaers, Felix Fraunhofer FKIE Wachtberg Germany

ISBN: (纸本)9781538647523

Many real world applications of target tracking and state estimation are non-linear filtering problems and can therefore not be solved by closed-form analytical solutions. In the recent past, tensor based approaches have become increasingly popular due to very effective decomposition algorithms, which allow the representation of discretized, high-dimensional data in compressed form. In this paper, a solution of the prediction step for a Bayesian filter is proposed, where the probability density function (pdf) is approximated by a tensor in Hierarchical Tucker Decomposition. It is shown, that the computation of the predicted pdf is about five times faster than the previously proposed Canonical Polyadic Decomposition format.

关键词： Tensile stress Probability density function Bayes methods array signal processing sensor arrays Conferences"

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SPARSE BAYESIAN LEARNING FOR DOA ESTIMATION OF CORRELATED SOURCES 10

SPARSE BAYESIAN LEARNING FOR DOA ESTIMATION OF CORRELATED SO...

引用

10th ieee sensor array and multichannel signal processing workshop (sam)

作者： Mecklenbraeuker, Christoph F. Gerstoft, Peter Leus, Geert TU Wien Inst Telecommun A-1040 Vienna Austria Univ Calif San Diego La Jolla CA 92093 USA Delft Univ Technol Dept Elect Engn Math & Comp Sci Delft Netherlands

ISBN: (纸本)9781538647523

Direction of arrival (DOA) estimation from array observations in a noisy environment is discussed. The source amplitudes are assumed to be correlated zero-mean complex Gaussian distributed with unknown covariance matrix. The DOAs and covariance parameters of plane waves are estimated from multi-snapshot sensor array data using sparse Bayesian learning (SBL). The performance of SBL is evaluated in terms of the fidelity of the reconstructed coherency matrix of the estimated plane waves.

关键词： Covariance matrices Direction-of-arrival estimation sensor arrays Estimation array signal processing signal processing algorithms"

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An Anti-jamming Method of ISAR Imaging with FDA-MIMO Radar 10

An Anti-jamming Method of ISAR Imaging with FDA-MIMO Radar

引用

10th ieee sensor array and multichannel signal processing workshop (sam)

作者： Li, Guangming Zhang, Qun Luo, Ying Li, Kaiming Su, Linghua Li, Rui Air Force Engn Univ Grad Coll Xian Shaanxi Peoples R China Air Force Engn Univ Informat & Nav Coll Xian Shaanxi Peoples R China

ISBN: (纸本)9781538647523

In recent years, the frequency diverse array (FDA) radar has attracted much attention due to its range-angle dependent beam-pattern. And multiple input multiple output (MIMO) radar has been widely investigated with the advantage of transmit waveform diversity. In this paper, a FDA-MIMO Inverse Synthetic Aperture Radar (ISAR) is proposed to achieve anti-jamming of ISAR imaging. LFM (Linear Frequency Modulated) and SFCS (Stepped-Frequency Chirp signal) signals are transmitted to jammer and targets respectively, and the received signals are matched filtering by the signal transmitted to the targets. So the jamming signal can't matched with the reference signal, the well anti-jamming effect can be obtained. The performance of the proposed method is evaluated by the simulation results.

关键词： Frequency diverse array multiple input multiple output inverse synthetic aperture radar anti-jamming

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Convex Joint Emitter Localization and Passive sensor Network Synchronization

Convex Joint Emitter Localization and Passive Sensor Network...

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ieee 7th sensor array and multichannel signal processing workshop (sam)

作者： Jean, Oren Weiss, Anthony J. Tel Aviv Univ Sch Elect Engn IL-69978 Tel Aviv Israel

ISBN: (纸本)9781467310710

PATENT PENDING. Time-of-arrival (TOA) localization is tightly coupled with sensor time synchronization. Synchronization can be obtained by GPS, atomic clocks or message exchange protocols. All methods affect the energy sources and the synchronization protocols use valuable bandwidth. We present self-synchronized localization algorithms that rely exclusively on TOA measurements performed by the sensor network on passing sources rendering it completely passive. Localization performance is close to that provided by a perfectly synchronized network. Such algorithms can also be used for sensor network synchronization and communication networks in general.

关键词： sensor networks

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The properties of adaptive algorithms with time varying weights

The properties of adaptive algorithms with time varying weig...

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1st ieee sensor array and multichannel signal processing workshop (sam 2000)

作者： Zatman, M MIT Lincoln Lab Lexington MA 02420 USA

ISBN: (纸本)0780363396

Most adaptive array processing schemes assume that the interference is 'wide sense stationary'. However, in practice this assumption is often violated. For example there may be motion of either the array and/or the interference during the processing interval. The asymptotic performance of two adaptive beamforming algorithms which compensate for this type of changing interference scenario are analyzed in this paper.

关键词： Adaptive algorithm Adaptive arrays Algorithm design and analysis array signal processing Covariance matrix Interference Laboratories Performance analysis signal to noise ratio Vectors

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Symmetric Sparse Linear array for Active Imaging 10

Symmetric Sparse Linear Array for Active Imaging

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10th ieee sensor array and multichannel signal processing workshop (sam)

作者： Rajamaki, Robin Koivunen, Visa Aalto Univ Sch Elect Engn Dept Signal Proc & Acoust Espoo 02150 Finland

ISBN: (纸本)9781538647523

Sparse sensor arrays can achieve significantly more degrees of freedom than the number of elements by leveraging the co-array, a virtual structure that arises from the far field narrowband signal model. Although several sparse array configurations have been developed for passive sensing tasks, less attention has been paid to arrays suitable for active sensing. This paper presents a novel active sparse linear array, called the Interleaved Wichmann array (IWA). The IWA only has a few closely spaced elements, which may make it more robust to mutual coupling effects. Closed-form expressions are provided for the key properties of the IWA. The parameters maximizing the array aperture for a given even number of elements are also found. The near field wideband performance of the array is demonstrated numerically in a coherent imaging scenario.

关键词： sensor arrays array signal processing Apertures Imaging Delays Wideband"

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Ultrasonic array Imaging for Immersion Non-Destructive Testing

Ultrasonic Array Imaging for Immersion Non-Destructive Testi...

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8th ieee sensor array and multichannel signal processing workshop (sam)

作者： Moallemi, Nasim Shahbazpanahi, Shahram Univ Ontario Inst Technol Fac Engn & Appl Sci Oshawa ON Canada

ISBN: (纸本)9781479914814

One of the applications of advanced array signal processing is immersion ultrasonic non-destructive testing (NDT), where a solid test sample and an array of transducers are immersed in water, for the purpose of imaging the test sample. To do so, the knowledge of the shape of the upper surface of the test sample is needed. We model the interface between water and the solid as an incoherently spatially distributed reflector. We then develop a covariance fitting based approach to estimate the parameters of the shape of the upper surface of the test sample. With the knowledge of the estimated shape of this surface, we use the same approach to estimate the parameters of the shape of a crack inside the test sample. Numerical simulations are conducted to show the accuracy of the proposed approach.

关键词： test sample ultrasonic arrays Nondestructive Testing array signal processing Transducers

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Antenna array Based Positional Modulation with a Two-Ray Multi-Path Model 10

Antenna Array Based Positional Modulation with a Two-Ray Mul...

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10th ieee sensor array and multichannel signal processing workshop (sam)

作者： Zhang, Bo Liu, Wei Univ Sheffield Commun Res Grp Dept Elect & Elect Engn Sheffield S1 4ET S Yorkshire England

ISBN: (纸本)9781538647523

Traditional directional modulation (DM) designs are based on the assumption that there is no multi-path effect between transmitters and receivers. One problem with these designs is that the resultant systems will be vulnerable to eavesdroppers which are aligned with or very close to the desired directions, as the received modulation pattern at these positions is similar to the given one. To solve the problem, a two-ray multi-path model is studied for positional modulation and the coefficients design problem for a given array geometry and a location-optimised antenna array is solved, where the multi-path effect is exploited to generate a given modulation pattern at desired positions, with scrambled values at positions around them.

关键词： Modulation array signal processing Receivers Phased arrays sensor arrays"

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