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检索条件"任意字段=2nd IEEE Sensor Array and Multichannel Signal Processing Workshop"

共 469 条记录，以下是231-240 订阅

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Landmine detection technology research programme at TNO 2

Landmine detection technology research programme at TNO

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2nd International workshop on Advanced Ground Penetrating Radar

作者： Schleijpen, HMA TNO Phys & Elect Lab Demining Res NL-2509 JG The Hague Netherlands

ISBN: (纸本)9076928045

This presentation gives an overview of most of the activities on research and development in the technology area for landmine detection at TNO in the Netherlands. The projects cover the range from military applications to humanitarian demining. In the "conventional" detection systems area the activities on an Instrumented Prodder, Metal Detection, Ground Penetrating Radar and Thermal Infrared will be covered. signal processing and sensor fusion are key activities in this area. The focus for these techniques is on vehicle mounted and airborne multi-sensor systems. The activities are supported by more fundamental modelling of the interaction of sensors with the landmines. Especially the effects of the environment of the mines (background clutter, scenario) on this interaction are taken into account. Future oriented techniques: forward-looking Polarised Infrared and Laser Vibrometry for moving platforms are discussed.

关键词： landmine detection sensor fusion

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Dynamic image simulations for adaptive sensor performance predictions

Dynamic image simulations for adaptive sensor performance pr...

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workshop on Hyperspectral Image and signal processing

作者： Presnar, Michael D. Kerekes, John P. Pogorzala, David R. Center for Imaging Science Rochester Institute of Technology Rochester NY United States Air Force Institute of Technology Wright-Patterson AFB Dayton OH United States

ISBN: (纸本)9781424489077

Comprehensive simulation of multispectral/hyperspectral synthetic imagery captured from a moving aerial platform is necessary for predicting real-life performance of adaptive sensor models. Physics-based modeling and simulation tools are required to synthesize sensor-reaching radiance imagery of an urban scene while incorporating moving vehicular targets, moving platform position & orientation with uncertainty, atmospheric conditions, and time-of-day effects. Trade studies of design parameters can be conducted to compare sensor output image and spectral quality. Orthorectification of direct detector imagery using a digital elevation map can produce registered imagery for target-tracking applications. This paper describes a novel combination of these modeling tools to support end-to-end adaptive sensor design studies. ©2010 ieee.

关键词： Target tracking

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Integrated design of STBC-based virtual-MIMO and distributed compression in energy-limited wireless sensor networks

Integrated design of STBC-based virtual-MIMO and distributed...

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2nd European workshop on Wireless sensor Networks

作者： Chebolu, ML Jayaweera, SK Wichita State Univ Dept ECE Wichita KS 67260 USA

ISBN: (纸本)0780388011

An integrated design of a joint distributed source coding and an adaptive signal processing scheme for a virtual multiple input multiple output (V-MIMO) communications-based, cooperative wireless sensor network is proposed. We employ a distributed coding scheme that exploits inherent correlations among sensor data and an adaptive correlation tracking technique base on Recursive Least Squares (RLS) algorithm that provides improved energy efficiency compared to previously proposed such joint coding and signal processing schemes for single input single output (SISO) communications based systems. An integration scheme with virtual space-time block coding based M-ary quadrature amplitude modulation (M-QAM) communication is also developed. The system efficiency is analyzed for various transmission distances and various channel conditions. Our results show that the proposed system achieves significant energy savings compared to conventional designs beyond certain transmission distances. The achieved energy efficiencies and low decoding error rates justify the application of the proposed scheme in energy constrained wireless sensor networks.

关键词： Wireless sensor networks

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A structure-based subspace fitting approach for interference rejection in moving uniform linear array 2

A structure-based subspace fitting approach for interference...

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2nd ieee China Summit / International Conference on signal and Information processing (ieee ChinaSIP)

作者： He, Shun Li, Guoming Xian Univ Sci & Technol Commun & Informat Engn Collage Xian 710054 Peoples R China

ISBN: (纸本)9781479954032

Space-time adaptive processing (STAP) is a well-suited methodology to eliminate strong interference in moving-platform sensor arrays. A fundamental issue in STAP is to determine the optimal weight vector. This can be obtained either by sample matrix inverse (SMI) or by subspace projection. We perform a structure-based two-stage signal subspace reconstruction to obtain an accurate estimate of the interference subspace with small training-data support. The performance of the proposed approach is evaluated based on numerically simulation.

关键词： interference rejection subspace projection uniform linear array space-time adaptive processing

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Trace-orthonormal full rate full diversity linear triangular cyclotomic space-time codes minimizing worst case pair-wise error probability

Trace-orthonormal full rate full diversity linear triangular...

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2004 sensor array and multichannel signal processing workshop

作者： Zhang, Jian-Kang Liu, Jing Wong, K. Max Department of Electrical and Computer Engineering McMaster University Hamilton Ont. Canada

ISBN: (纸本)0780385454

We consider the flat fading wireless link where the number of transmitter antennas is greater than the number of receiver antennas and the channel is known to the receiver. For such systems, the currently available linear space-time block codes provide full rate and full diversity, but cannot guarantee that the optimal coding gain is achieved. In this paper, by taking advantage of delay we propose the trace-orthonormal full rate full diversity linear triangular cyclotomic space-time block codes, which actually is a generalization of the linear diagonal space-time block code. A universal lower bound on the worst case average pair-wise error probability is derived for any linear space-time block code. Particularly when the number of the transmitter antennas is equal to 2m, we prove that our proposed code minimizes the worst case average pair-wise error probability of the maximum likelihood detector for M-ary Quadrature Amplitude Modulation (QAM). Therefore, in this case, it achieves the optimal coding gain. ©2004 ieee.

关键词： Space time adaptive processing

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Optical signal processing for CNN's 2

Optical Signal processing for CNN's

引用

2nd International workshop on Cellular Neural Networks and their Applications, CNNA 1992

作者： Lueder, Ernst Fruehauf, Norbert Institut für Netzwerk u. Systemtheorie Universität Stuttgart Pfaffenwaldring 47 Stuttgart 80D-7000 Germany

ISBN: (纸本)0780308751

signal processing in Cellular Neural Networks (CNNs) consists of multiplying and adding of signals, of calculating correlations and of shaping signals with a nonlinear function. These operations are transformed into optical processing steps by using spatial light modulators (SLMs) and lenses as basic optical elements. The SLM performs multiplications massively in parallel and with the speed of light whereas lenses realize a Fourier transform. A special system with two SLMs and two lenses is able to represent an array of CNNs without severe limitations on the interconnections between neurons. The paper gives an introduction and an overview on optical signal processing for CNNs. It is concluded by an example for optical pattern recognition. © 1992 ieee.

关键词： Cellular neural networks

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Remarks on Neural Network-Based Tea Aroma Recognition with a Mass-Sensitive Chemical sensor Using Plasma-Organic-Polymer-Film-Coated Quartz Crystal Resonators 2

Remarks on Neural Network-Based Tea Aroma Recognition with a...

引用

2nd International Conference on Frontiers of signal processing (ICFSP)

作者： Takahashi, Kazuhiko Mune, Madoka Sugimoto, Iwao Doshisha Univ Fac Sci & Engn Kyoto Japan Tokyo Univ Technol Sch Comp Sci Tokyo Japan

ISBN: (纸本)9781509083152

This study investigates a method for recognition of tea aroma using a multilayer neural network. A gas-sensing system utilising an array of quartz crystal resonators coated with plasma-organic-polymer-films is designed. Three teas, oolong, jasmine and puerh, are used as the sources of sample gas. Wavelet transform frequency analysis is applied to the signals from the gas-sensing system, and the features of the sensor response are extracted. These features are used as input vectors to a neural network. The neural network achieves an average recognition rate of 96.7% for the three tea samples. Our experimental results demonstrate the effectiveness of the gas-sensing system and neural network in this application.

关键词： chemical sensor plasma organic polymer film tea aroma wavelet transform neural network

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Image simulation of geostationary sensor dedicated to ocean color

Image simulation of geostationary sensor dedicated to ocean ...

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workshop on Hyperspectral Image and signal processing

作者： Lei, Manchun Minghelli-Roman, Audrey Mathieu, Sandrine Gouton, Pierre LE2I UMR-CNRS 5158 University of Burgundy Aile Sciences de l'Ingénieur BP 47870 21078 Dijon France LSEET UMR-CNRS 6017 ISITV Avenue Georges Pompidou 83162 La Valette du Var France Thales Alenia Space BUOS/PG/I 100 Bd du Midi 06156 Cannes la Bocca Cedex France

ISBN: (纸本)9781424489077

A method of image simulation of geostationary sensor dedicated to ocean color for open water (case1) and coastal water (case2) is presented in this paper. This method uses HYDROLIGHT to model the radiative transfer in order to obtain the water surface radiance. MeRIS level 3 products have been used for input water components to provide a realistic spatial distribution. The atmospheric radiative transfer model and the sensor model finely lead to satellite remote sensing images. This system allows to evaluate the dynamic range of BOA and TOA radiances depending on solar and viewing angles in operational situation and latter their influence on water composition retrieval. ©2010 ieee.

关键词： Radiative transfer

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Obstacle Size and Proximity Detection Using Stereo Images for Agile Aerial Robots 2

Obstacle Size and Proximity Detection Using Stereo Images fo...

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2nd International Conference on signal processing and Integrated Networks (SPIN)

作者： Majumder, Shibarchi Shankar, Rahul Prasad, Mani Shankar Amity Univ Inst Space Sci & Technol Noida India Amity Univ Inst Nucl Sci & Technol Noida India

ISBN: (纸本)9781479959914

For autonomous flight in adverse environment, real time obstacle information is very important. There are many sensors like LiDAR, SAR which gives pretty accurate obstacle data. However, using such devices onboard is quite expensive in terms of power and operation cost. This paper introduces a technique to find the size and distance of obstacle using stereo images by correlating the physical size to in-pixel size. This technique allows agile UAVs to fly in un-cooperative environments without any heavy sensor.

关键词： Obstacle Size Estimation Image Based Obstacle Avoidance Stereo Images Aerial Obstacle Detection View angle Disparity array

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Three-Dimensional Positioning Using ALOS/Prism Triple Linear-array Satellite Images 2

Three-Dimensional Positioning Using ALOS/Prism Triple Linear...

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2nd ieee International Conference on signal and Image processing (ICSIP)

作者： Teo, Tee-Ann Yu, Chaoyi Natl Chiao Tung Univ Dept Civil Engn Hsinchu Taiwan

ISBN: (纸本)9781538609699

Three-line scanner satellites obtain in-track triple images using multiple linear charged-couple devices (CCDs). These highly overlapped triple images provide valuable intersection geometry and similar features between images and are therefore beneficial to three-dimensional (3-D) modeling. This study focused on orientation modeling and space intersection for in-track triple images and compared the accuracy of independent and block-adjustments using different models. The independent adjustment compensates the orbital error of each image using time-dependent polynomials equations and compensates image-space error with parameter transformation. Block adjustment corrects the orbital error of triple images simultaneously. The test data are ALOS/PRISM triplet images. The 3-D positioning accuracies of the independent adjustment model achieved 6.7 m and 6.5 m in horizontal and vertical directions, respectively. By contrast, the block adjustment achieved 7.7 m and 4.6 m accuracies in horizontal and vertical directions, respectively. Experimental results showed that the accuracy of positioning between independent and block adjustment is similar, but only 10 control points were used in the block adjustment. The proposed block adjustment significantly reduced the demand of the control points.

关键词： three-line scanner 3-D positioning rigorous sensor model rational function model alos prism

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