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检索条件"任意字段=2008 IEEE Sensor Array and Multichannel Signal Processing Workshop"

共 1267 条记录，以下是691-700 订阅

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Distributed Detection With A Scan Statistic: Global to Local Inference

Distributed Detection With A Scan Statistic: Global to Local...

引用

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

作者： Song, Xiufeng Willett, Peter Glaz, Joseph Zhou, Shengli Univ Connecticut Dept Elect & Comp Engn 371 Fairfield WayU-2157 Storrs CT 06269 USA Univ Connecticut Dept Stat Storrs CT 06269 USA

ISBN: (纸本)9781467310710

sensor networks offer an opportunity for improving submarine detection. Let each sensor firstly make a binary local decision-'0' or '1', and then a fusion center collects them to make a system-level inference without knowledge of probabilities of local detection. An obvious strategy is a counting rule test, which simply counts the total number of 1's and compares it to a threshold. This approach equally considers all network subareas. However, reflected signals from a submarine are highly aspect dependent, and in many instances only sensors in a particular zone could receive the echoes. This paper focuses on the scan statistic, which slides a window across the sensor field, and selects the subarea with the largest number of 1's to make a decision. The scan statistic integrates the spatial distinction of local decisions into detection fusion. With a proper window size, it may suppress subarea interference, and improve system-level performance.

关键词： Distributed detection detection fusion scan statistic counting rule test sensor network submarine

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Low Rank Tensor STAP filter based on multilinear SVD

Low Rank Tensor STAP filter based on multilinear SVD

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

作者： Boizard, Maxime Ginolhac, Guillaume Pascal, Frederic Forster, Philippe ENS Cachan SATIE 61 Av President Wilson F-94230 Cachan France SONDRA Super Elect F-91192 Gif Sur Yvette France

ISBN: (纸本)9781467310710

Space Time Adaptive processing. STAP) is a two-dimensional adaptive filtering technique which uses jointly temporal and spatial dimensions to suppress disturbance and to improve target detection. Disturbance contains both the clutter arriving from signal backscattering of the ground and the thermal noise resulting from the sensors noise. In practical cases, the STAP clutter can be considered to have a low rank structure. Using this assumption, a low rank vector STAP filter is derived based on the projector onto the clutter subspace. With new STAP applications like MIMO STAP or polarimetric STAP, the generalization of the classic filters to multidimensional configurations arises. A possible solution consists in keeping the multidimensional structure and in extending the classic filters with multilinear algebra. Using the low-rank structure of the clutter, we propose in this paper a new low-rank tensor STAP filter based on a generalization of the Higher Order Singular Value Decomposition. HOSVD) in order to use at the same time the simple. for example time, spatial, polarimetric, ...) and the combined information. for example spatio-temporal). Results are shown for two cases : classic 2D STAP and 3D polarimetric STAP. In the classic case, vector and tensor filters are equivalent. In the polarimetric case, we show the enhancement of the tensor filter.

关键词： Space time adaptive processing

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A heterogeneous Markov chain model of target existence variable for Bayesian track-before-detect

A heterogeneous Markov chain model of target existence varia...

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2012 ieee 7th sensor array and multichannel signal processing workshop, SAM 2012

作者： Xia, S.Z. Dai, F.Z. Liu, H.W. National Lab. of Radar Signal Processing Xidian University Xi'an 710071 China

ISBN: (纸本)9781467310710

A heterogeneous Markov chain (MC) model, instead of the homogeneous MC model, is proposed in this paper to describe target existence variable for Bayesian track-before-detect. The proposed model is more consistent with the transitions of target existence variable, which leads to the improvement of the performance of detection and tracking. © 2012 ieee.

关键词： Markov processes

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Decision fusion in MIMO wireless sensor networks with channel state information

Decision fusion in MIMO wireless sensor networks with channe...

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2012 ieee 7th sensor array and multichannel signal processing workshop, SAM 2012

作者： Ciuonzo, Domenico Romano, Gianmarco Salvo Rossi, Pierluigi Department of Information Engineering Second University of Naples Italy

ISBN: (纸本)9781467310710

We study channel-aware binary decision fusion over a Rayleigh flat fading shared channel with multiple antennas at the Decision Fusion Center (DFC). We derive the optimum and three sub-optimal fusion rules, namely the Max-Log, the Chair-Varshney - Maximum Likelihood and the Maximum Ratio Combining rules. Simulation results for the performance are presented in terms of Probability of Detection (under a fixed false alarm rate) vs SNR and number of antennas. The effect of multiple antennas at the DFC for the presented rules is analyzed, showing benefits and limitations of the choice. © 2012 ieee.

关键词： Maximum likelihood

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Effective rate analysis of MISO Rician fading channels

Effective rate analysis of MISO Rician fading channels

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2012 ieee 7th sensor array and multichannel signal processing workshop, SAM 2012

作者： Matthaiou, Michail Alexandropoulos, George C. Ngo, Hien Quoc Larsson, Erik G. Department of Signals and Systems Chalmers University of Technology Gothenburg Sweden Broadband Wireless and Sensor Networks Group Athens Information Technology Athens Greece Department of Electrical Engineering Linköping University Linköping Sweden

ISBN: (纸本)9781467310710

The delay constraints imposed by future wireless applications require a suitable metric for assessing their impact on the overall system performance. Since the classical Shannon's ergodic capacity fails to do so, the so-called effective rate was recently established as a rigorous alternative. Yet, most prior relevant works have considered only the typical case of Rayleigh fading which allows for tractable manipulations. In this paper, we relax this assumption by considering the more general Rician fading model for multiple-input single-output (MISO) systems. A new, analytical expression for the exact effective rate is derived, along with tractable expressions for the key parameters dictating the effective rate performance in the high and low signal-to-noise (SNR) regimes. © 2012 ieee.

关键词： Rayleigh fading

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2010 ieee sensor array and multichannel signal processing workshop, SAM 2010

2010 IEEE Sensor Array and Multichannel Signal Processing Wo...

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2010 ieee sensor array and multichannel signal processing workshop, SAM 2010

ISBN: (纸本)9781424489770

The proceedings contain 68 papers. The topics discussed include: target tracking in mixed LOS/NLOS environments based on individual TOA measurement detection;band-diagonal regularization of Gaussian interference covariance matrices ml estimates;combining multiband joint position-pitch algorithm and particle filters for speaker localization;a reference-free time difference of arrival source localization using a passive sensor array;the breakdown point of signal subspace estimation;hypothesis testing in high-dimensional space with the sparse matrix transform;likelihood-ratio and channel based access for energy-efficient detection in wireless sensor networks;on Toeplitz and Kronecker structured covariance matrix estimation;robust focusing for wideband MVDR beamforming;nonparametric Bayesian matrix completion;and expected likelihood support for deterministic maximum likelihood DOA estimation.

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On consensus of multiple uncertain nonlinear systems

On consensus of multiple uncertain nonlinear systems

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sensor array and multichannel signal processing workshop

作者： Wenjie Dong Department of Electrical Engineering University of Texas-Pan American Edinburg USA

This paper considers consensus control problem of multiple nonlinear systems with uncertainty. Consensus algorithms are proposed with the aid of Lyapunov techniques and results from graph theory. To show the effective... 详细信息

关键词： Nonlinear systems Algorithm design and analysis signal processing algorithms Trajectory Graph theory Heuristic algorithms

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A method for differentially coherent multichannel processing of acoustic OFDM signals

A method for differentially coherent multichannel processing...

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sensor array and multichannel signal processing workshop

作者： Yashar M. Aval Milica Stojanovic Northeastern University China

We propose a low complexity array processing method for differential detection of OFDM signals over underwater acoustic channels. Partial FFT technique, developed previously for mitigating inter-carrier interference in single-channel receivers operating over time-varying channels, is extended to multichannel configuration. Performance results based on simulation and experimental data demonstrate the advantage of the proposed method compared to conventional differential and coherent detection.

关键词： OFDM Demodulation Doppler effect Coherence Receivers arrays Acoustics

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A heterogeneous Markov chain model of target existence variable for Bayesian track-before-detect

A heterogeneous Markov chain model of target existence varia...

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sensor array and multichannel signal processing workshop

作者： S.Z. Xia F.Z. Dai H.W. Liu National Laboratory of Radar Signal Processing Xidian University Xi'an China

关键词： Target tracking Radar tracking Bayesian methods Particle filters Educational institutions Mathematical model

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Time division multiple access methods in bi-directional cooperative relay networks

Time division multiple access methods in bi-directional coop...

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sensor array and multichannel signal processing workshop

作者： Adrian Schad Marius Pesavento Communication Systems Group Technische Universität Darmstadt Darmstadt Germany

In this paper, we develop a new class of time division multiple access schemes for bi-directional multiuser communications in cooperative amplify-and-forward relay networks. The proposed schemes enable a flexible trade-off between spectral efficiency and suppression of multiuser interference. The relay weights are chosen to maximize the minimum received quality-of-service of all the users under constraints on the individual and the total power at the relays. Simulation results demonstrate that the selection of the scheme has a considerable impact on the achieved throughput of the relay network.

关键词： Relays Vectors Interference array signal processing signal to noise ratio Resource management Time division multiple access

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