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检索条件"任意字段=Conference on Signal and Data Processing of Small Targets 2010"

共 976 条记录，以下是381-390 订阅

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Establishing a Common Phase Reference for Comparing Synthetic data to RF Range Measurements

Establishing a Common Phase Reference for Comparing Syntheti...

引用

2010 IEEE Radar conference

作者： Kastle, Michael J. Malas, John A. SAIC Reconnaissance & Surveillance Operat Wright Patterson AFB OH USA US Air Force Sensors Directorate Res Lab Paterson OH USA

ISBN: (纸本)9781424458127

Discrepancies can result when creating common data sets consisting of comparable synthetic and measured range complex scattered field samples when the phase references of each do not coincide. This can be especially true when using signal processing techniques to produce one dimensional (range profiles) or two dimensional (Synthetic Aperture Radar or SAR images) representations of the target scattered field where range bins and cross-range bins are formed. Range profiles and SAR images can be misaligned or have different bin amplitudes due to target scatterers in synthetic and measured scenarios shifted with respect to one another. Obtaining equivalent data samples requires attention to the measured data calibration process and phase reference location. This paper will address the common phase reference problem by an analysis of experimental data for specific targets and rotation system. Suggestions are provided for possible solutions to current challenges. The data analysis will include synthetic and measured range data comparisons, range calibration, and target position and range alignment processes using Theodolite laser measurements.

关键词： Synthetic aperture radar

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data aggregation in body sensor networks: A power optimization technique for collaborative signal processing

Data aggregation in body sensor networks: A power optimizati...

引用

7th Annual IEEE Communications Society conference on Sensor, Mesh and Ad Hoc Communications and Networks, SECON 2010

作者： Ghasemzadeh, Hassan Jafari, Roozbeh Department of Electrical Engineering Embedded Systems and Signal Processing Lab Univeristy of Texas at Dallas Richardson TX 75080-3021 United States

ISBN: (纸本)9781424471515

Body sensor networks (BSNs) have proved their viability to greatly improve quality of medical care by providing continuous and in-home monitoring solutions. Highly constrained nature of the platform demands a design that efficiently utilizes limited resources of the system. Energy optimization techniques are especially desirable as the system lifetime is constrained by small batteries that power sensor nodes in a BSN. In this paper, we introduce a novel data-centering routing model to minimize communication energy, taking collaborative nature of signal processing for healthcare applications into consideration. Transmission energy for a path is determined as a compromise between the path length and the amount of data being transmitted along the path. data produced by different nodes are aggregated to form packets of large size that consume smaller energy per bit. We formulate the problem as a minimum concave cost multicommodity flow problem and propose two approaches to find both optimal and approximate solutions. We evaluate performance of our energy minimization techniques on a variety of synthesized signal processing task graphs, as well as a real application for evaluating human postural control system. The results show an average of 35% energy saving with the proposed routing against a simple shortest path approach. © 2010 IEEE.

关键词： signal processing

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Design and implementation of a dual-interface radar data recorder

Design and implementation of a dual-interface radar data rec...

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2010 2nd International conference on signal processing Systems, ICSPS 2010

作者： Jun, Wang Hai, Jiang Yuxi, Zhang Wang, Yao Yuxian, Zhang Beijing 100191 China Automatic Control and Computer Simulation Liaoning 125001 China

ISBN: (纸本)9781424468911

This paper analyses the design and implementation of a small-scale dual-interface radar data recorder based on DSP+FPGA. It has two types of interfaces: solid-state IDE hard disk and RJ45. The recorder can save sampling data of original radar waveforms in real time for further analysis and validation. It adapts to a variety of application environments and has a high storage speed and reliable operation performance. It can be widely used in radar testing and flight experiments. © 2010 IEEE.

关键词： Hard disk storage

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Design of data acquisition and processing system of photoionization signal based on C8051F040

Design of data acquisition and processing system of photoion...

引用

2010 International conference on Computer Application and System Modeling, ICCASM 2010

作者： Yin, Ya-Fei Liang, Ting Han, Yu Yang, Xu-Jun Zhang, Qian-Qian Key Laboratory of Instrumentation Science and Dynamic Measurement North University of China Ministry of Education Tai Yuan China

ISBN: (纸本)9781424472369

In this paper, a new kind of data acquisition and processing system of portable photo ionization detect instrument is introduced. Using the fully integrated mixed signal chip C8051F040 as the micro control unit, this system can realize functions of the double range measurement of the data acquisition, the temperature compensation, the digital display and the serial interface for data sending. The design of double range measurement circuit and the design of the temperature compensation circuit are described in detail. This system has many advantages, such as high integration, small in size, low power dissipation, easy operation and wide application scope, etc. © 2010 IEEE.

关键词： data acquisition

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Multiple acoustic source localization based on multiple hypotheses testing using particle approach

Multiple acoustic source localization based on multiple hypo...

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2010 IEEE International conference on Acoustics, Speech, and signal processing, ICASSP 2010

作者： Lee, Yeongseon Wada, Ted S. Juang, Biing-Hwang Center for Signal and Image Processing Georgia Institute of Technology Atlanta GA 30332 United States

ISBN: (纸本)9781424442966

Localization of multiple acoustic sources in a non-ideal environment has a number of difficulties, among which are accurate acoustic feature estimation for multiple sources and association uncertainty between measurements and their corresponding sources. This paper focuses more on the latter and proposes an algorithm based on a multiple-hypothesis framework for both a measurement model and a measurement association model to localize multiple sources. A conditional data likelihood model based on a measurement hypothesis is proposed and implemented using particles. Simulation results demonstrate that the proposed algorithm is capable of localizing the positions of multiple sources with a small number of microphones without any prior knowledge when the amount of reverberation is moderate. ©2010 IEEE.

关键词： Time difference of arrival

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Application of Aperture Extrapolation Beamformer in Multibeam Bathymetric Sonar

Application of Aperture Extrapolation Beamformer in Multibea...

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IEEE 10th International conference on signal processing

作者： Zhou, Tian Li, Shan Li, Haisen Yin, Lu Harbin Engn Univ Sci & Technol Underwater Acoust Lab Harbin Peoples R China Naval Univ Engn Coll Elect Engn Wuhan Peoples R China

ISBN: (纸本)9781424458981

Limited by the cost, the size of multibeam bathymetric sonar becomes smaller. It is a significant issue to increase the beamforming capability of small aperture array. As the most commonly used method at present, virtual aperture technique together with LPAE beamforming method is discussed in detail in the paper. Compared with conventional beamforming method through theoretical analysis and computer simulation, LPAE beamforming has better performance for higher SNR, narrower receiving beams, and better resolution ability on nearly spaced goals. This method is proved to be effective, practical and superior by the processed results recorded with multibeam sonar sea trial data.

关键词： multibeam bathymetric sonar LPAE beamformer signal to noise ratio resolution ability

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Multi-radar system database integration using metrized small world technology

Multi-radar system database integration using metrized small...

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作者： Ponomarev, Dmitry Krylov, Vladimir Pankratov, Yuri MeraLabs LLC Nizhny Novgorod Russia

ISBN: (纸本)9781424459148

the present article describes the possibility of integrating the data from several radars with shared radiolocation areas in order to acquire precise information about the targets by means of analyzing the events in neighboring spatiotemporal resolution elements. The paper suggests an algorithm for integrating the data based on creating the graph which possesses the characteristics of the "Metrized small World". A possibility of processing the integrated data in real time is analyzed. The article describes efficient metrics for integrating multi-radar data into a single Metrized small World graph. Examples of such algorithms are given.

关键词： data fusion

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Detecting and identifying two stationary-human-targets: A technique based on bioradar

Detecting and identifying two stationary-human-targets: A te...

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International conference on Pervasive Computing, signal processing and Applications

作者： Yang, Zhang Xijing, Jing Teng, Jiao Zhu, Zhang Hao, Lv Jianqi, Wang Faculty of Biomedical Engineering Fourth Military Medical University Xi'an China

ISBN: (纸本)9780769541808

Bioradar is a novel kind of radar combining the technology of radar and biomedical engineering. It can detect vital signals (such as breath, heartbeat, movement, etc.) in a certain distance through the nonmetal substances (such as brick walls, rubble, etc.) without using electrodes or sensors. However, multi-stationary-human-target identifying and locating has not been resolved yet. Based on the Ultra Wideband (UWB) bioradar, we developed a method combining biomedical signal processing and space-frequency analysis to distinguish two stationary human subjects in different distances and to identify the location of each human subject. Experiments were done to evaluate the effectiveness of the proposed method. In 86 data sets the accuracy of distinguishing two stationary subjects reached 73 %. This method may serve as a basis for further studies in developing appropriate 2-Dimension locating image reconstruction models via multi-antenna (static) UWB radar. © 2010 IEEE.

关键词： Image reconstruction

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Bearing estimation using small tetrahedral passive hydrophone array

Bearing estimation using small tetrahedral passive hydrophon...

引用

Washington State conference and Trade Center (WSCTC)

作者： Datta, Urmila Otnes, Roald Lucas, Carmen Norwegian Def Res Estab FFI New York NY 10118 USA Def Res & Dev Canada Ottawa ON Canada

ISBN: (纸本)9781424443338

The NILUS (Networked Intelligent Underwater Sensors) demonstrator system for autonomous underwater sensor networks contains sensor nodes equipped with a tetrahedral passive hydrophone array. The dimensions of the array are small compared to the wavelength of the received acoustic signals. NILUS has been deployed in several sea trials. In the trials, sensor data have been recorded for post-trial analysis in addition to being processed directly at the nodes to provide on-line detection information and bearing estimates, which are sent to an operator through an underwater acoustic communication network. This paper describes the algorithms used for the estimation of bearing (azimuth) and elevation for the tetrahedral array system and the performance based on real-world data. The observed performance is supported by simulation results. Two different methods are used to process the tetrahedral array data. In the first method adaptive beamforming using MVDR (Minimum Variance Distortionless Response) is applied, and the dominant bearings of the beampower output are extracted using a histogram-based algorithm. The second method is based on phase gradients. This algorithm is able to estimate one bearing (azimuth) angle, and also elevation.

关键词： MVDR NILUS demonstrator system acoustic signal acoustic signal processing adaptive beamforming adaptive signal processing array signal processing autonomous underwater sensor networks bearing estimation direction-of-arrival estimation distributed sensors gradient methods histogram-based algorithm hydrophones intelligent sensors minimum variance distortionless response networked intelligent underwater sensor phase gradient method tetrahedral array data tetrahedral passive hydrophone array underwater acoustic communication underwater acoustic communication

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A fuzzy adaptive tracking algorithm based on current statistical probabilistic data association

A fuzzy adaptive tracking algorithm based on current statist...

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2010 2nd International conference on signal processing Systems, ICSPS 2010

作者： Yu, Haixia Fu, Caikui Li, Jiang School of Information Engineering Dalian University of Technology Dalian China DATON SECURITIES Dalian China

ISBN: (纸本)9781424468911

In this paper, a new fuzzy adaptive maneuvering target tracking algorithm based on current statistic model is proposed. How to track a maneuvering target is a key problem of target tracking in clutter. Current statistical model needs to pre-define the value of maximum accelerations of maneuvering targets. So it may be difficult to meet all maneuvering conditions. The Fuzzy inference combined with Current statistical model is proposed to cope with this problem. Given the error and change of error in the last prediction, fuzzy system on-line determines the magnitude of maximum acceleration to adapt to different target maneuvers. Furthermore, the difficulties of the maneuvering target tracking lies in the uncertainty of state model, and the clutter make it more complex. The algorithm combines current statistical algorithm with probabilistic data association algorithm. At last, the results show this algorithm can estimate a maneuvering target in clutter efficiently. © 2010 IEEE.

关键词： Clutter (information theory)

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