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The application of linear image array sensor in note counter to fulfil banknote code recognition

The application of linear image array sensor in note counter...

引用

3rd International Conference on Intelligent Human-Machine Systems and Cybernetics, IHMSC 2011

作者： Xu, Linlin Yuan, Weiqi Su, Yuhan Higher Vocational and Technical College University of Science and Technology Liaoning Anshan China Computer Vision Group Shenyang University of Technology Shenyang China ACRE Coking and Refractory Engineering Consulting Corporation MCC Anshan China

ISBN: (纸本)9780769544441

Base on the characteristic of each banknote has its own unique code, it can monitor banknote circulation and provide an approach of solving financial market security problems. In this paper, it will discuss the popular vertical notes counter in the market using linear array sensor and digital signal processor to fulfill synchronizing dynamic banknote code image acquisition, real-time processing and recognition, at the same time, it will use USB mainframe controller to store the recognition results in a portable way. © 2011 ieee.

关键词： Digital signal processors

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Color filter array demosaicking using optimized edge direction map

Color filter array demosaicking using optimized edge directi...

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3rd ieee International workshop on Multimedia signal processing, MMSP 2011

作者： Kim, Seyun Cho, Nam Ik Dept. of Electrical Engineering and Computer Science Seoul National University Seoul 151-744 Korea Republic of

ISBN: (纸本)9781457714337

This paper proposes a new color filter array de-mosaicking method with emphasis on the edge estimation. In many existing approaches, the demosaicking is considered a directional interpolation problem, and thus finding the correct edge direction is a very important factor. However, these methods sometimes fail to determine an accurate interpolating direction because they use local information from neighboring pixels. For the estimation of edge direction using global information, we employ an MRF framework where the energy function is formulated by defining new notions of interpolation risk and pixel connectivity. Minimizing this function gives the edge directions, and the green channel is interpolated along the edges. Then we iterate the luminance update and color correction using the high frequencies from green channel. The algorithm is tested with the commonly used images, and it is shown to yield higher CPSNR than the state-of-the-art methods in many images, up to 2.7dB at maximum and 0.4dB on average. Subjective comparison also shows that the proposed method produces less artifacts on complex structures. © 2011 ieee.

关键词： Interpolation

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A high-performance convolver systolic array 3

A high-performance convolver systolic array

引用

3rd International workshop on Design of Mixed-Mode Integrated Circuits and Applications

作者： Aguirre Hernández, M. Linares Aranda, M. Inst. Nacional de Astrofisica Ópt. y Electrón. Apdo. postal 51 y 216 Puebla Pue.C.P. 72000 Mexico

ISBN: (纸本)0780355881

Convolution is a very important and useful operation in the field of digital signal processing. In this paper, the design of a high performance CMOS convolver circuit of digital signals, is presented. The circuit was designed with a bit-level systolic array architecture with unidirectional data flow. In order to allow high-speed operation, a dynamic logic style of true single-phase clock was used and some low-power techniques were applied to maintain a relative low power consumption. The circuit was designed with a 0.5 μm CMOS technology. The simulations done with SPICE show a cutoff frequency as high as 2.94 GHz at 3.3 V supply voltage. © 1999 ieee.

关键词： Systolic arrays

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Wireless personal area networks in telemedical environment

Wireless personal area networks in telemedical environment

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Joint Meeting of the 3rd ieee EMBS International Conference on Information Technology Applications in Biomedicine/3rd workshop of the Int-Telemedical-Information-Society

作者： Jovanov, E Price, J Raskovic, D Kavi, K Martin, T Adhami, R Univ Alabama Dept Elect & Comp Engn Huntsville AL 35899 USA

ISBN: (纸本)078036449X

We present a new design of wireless personal area network with physiological sensors for medical applications in telemedical environment. Intelligent wireless sensors perform data acquisition and limited processing. Individual sensors monitor specific physiological signals (such as EEG, EGG, GSR, etc.) and communicate with each other and the personal server. Personal server integrates information from different sensors and communicates with the rest of telemedical system as a standard mobile unit. We present our prototype implementation of Wireless Intelligent sensor (WISE) based on a very low power consumption microcontroller and a DSP-based personal server. In future we expect all components of WISE integrated in a single chip for use in a variety of new medical applications and sophisticated human computer interfaces.

关键词： wireless networks personal area networks telemedicine intelligent sensors signal processing

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AN INFORMATION FUSION APPROACH TO RECOGNIZING MICROPHONE array SPEECH IN THE CHIME-3 CHALLENGE BASED ON A DEEP LEARNING FRAMEWORK

AN INFORMATION FUSION APPROACH TO RECOGNIZING MICROPHONE ARR...

引用

ieee workshop on Automatic Speech Recognition and Understanding (ASRU)

作者： Du, Jun Wang, Qing Tu, Yan-Hui Bao, Xiao Dai, Li-Rong Lee, Chin-Hui Univ Sci & Technol China Hefei Anhui Peoples R China Georgia Inst Technol Atlanta GA 30332 USA

ISBN: (纸本)9781479972913

We present an information fusion approach to robust recognition of microphone array speech for the recently launched 3rd CHiME Challenge. It is based on a deep learning framework with a large neural network consisting of subnets with different architectures. Multiple knowledge sources are integrated via an early fusion of normalized noisy features with different beamforming techniques, speech enhanced features, speaker related features, and other auxiliary features concatenated as the input to each subnet, and a late fusion by combining the outputs of all subnets to produce one single output set. Our experiments demonstrate that all information sources are complementary in our proposed framework. Our best system achieves an average word error rate reduction of 68% from the officially released baseline results on the test set of real data.

关键词： CHiME Challenge deep learning information fusion microphone array robust speech recognition

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Optimal Energy Beamforming and Data Routing for Immortal Wireless sensor Networks

Optimal Energy Beamforming and Data Routing for Immortal Wir...

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ieee International Conference on Communications (ICC) / Wireless Communications Symposium / 3rd workshop on Optical Wireless Communications (OWC)

作者： Du, Rong Ozcelikkale, Ayca Fischione, Carlo Xiao, Ming KTH Royal Inst Technol Network & Syst Engn Stockholm Sweden Chalmers Univ Technol Dept Signals & Syst Gothenburg Sweden KTH Royal Inst Technol Commun Theory Dept Stockholm Sweden

ISBN: (纸本)9781467389990

Wireless sensor networks (WSNs) consist of energy limited sensor nodes, which limits the network lifetime. Such a lifetime can be prolonged by employing the emerging technology of wireless energy transfer (WET). In WET systems, the sensor nodes can harvest wireless energy from wireless charger, which can use energy beamforming to improve the efficiency. In this paper, a scenario where dedicated wireless chargers with multiple antennas use energy beamforming to charge sensor nodes is considered. The energy beamforming is coupled with the energy consumption of sensor nodes in terms of data routing, which is one novelty of the paper. The energy beamforming and the data routing are jointly optimized by a non-convex optimization problem. This problem is transformed into a semi-definite optimization problem, for which strong duality is proved, and thus the optimal solution exists. It is shown that the optimal solution of the semi-definite programming problem allows to derive the optimal solution of the original problem. The analytical and numerical results show that optimal energy beamforming gives two times better monitoring performance than that of WET without using energy beamforming.

关键词： Wireless sensor networks Routing array signal processing Wireless communication Monitoring Ad hoc networks Energy consumption

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Parameters estimation using a random linear array and compressed sensing

Parameters estimation using a random linear array and compre...

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2010 3rd International Congress on Image and signal processing, CISP 2010

作者： Han, Kuoye Wang, Yanping Kou, Bo Hong, Wen National Key Laboratory of Microwave Imaging Technology Institute of Electronics Chinese Academy of Sciences Beijing 100190 China

ISBN: (纸本)9781424465149

Existing sensor array signal processing techniques always use linear arrays sampled at Nyquist rate which demands the inter-element spacing is less than or equal to half of the system wavelength. Only in this way can algorithms such as MUSIC, Capon's beamformer estimate the direction-of-arrival (DOA) of the sources unambiguously. However, in some practical use, it seems difficult to satisfy the spatial sampling theorem. Compressed Sensing (CS) is a novel theory which enables perfect recovery of signals and data from what appear highly sub-Nyquist-rate samples on the condition that the signals or data are sparse or compressible in some domain. This implies that for spatially sparse signals, we can design a linear array with sparse property that will enable us to implement DOA estimates or even reconstruct the original signals accurately. In this paper, we proposed a parameters estimation method based on arrays with sub-Nyquist spatio-temporal sampling. We first sample the signals randomly in spatial domain, which means extracting a finite number of elements from a conventional uniform linear array. Then the signal in each channel is sampled by a random demodulator. By performing CS reconstruction algorithms, not only the DOAs can be estimated, but the original sources' waveforms will be recovered accurately. ©2010 ieee.

关键词： Compressed sensing

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A Novel DOA Estimation Algorithm with Uncalibrated array

A Novel DOA Estimation Algorithm with Uncalibrated Array

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1996 3rd International Conference on signal processing(ICSP’96)

作者： Jia Yongkang Wu Huan Bao Zheng Institute of Electronic Engineering Xidian University

ISBN: (纸本)0780329120

A novel algorithm of DOA estimation with unknown sensor gain and phase error is presented in this *** is no need of error calibration for this *** sensors' gain and phase can be estimated after the estimation of *** application of this algorithm to linear array is also *** simulation results illustrate that this algorithm has a good performance in medium or higher SNR for array with serious gain and phase errors.

关键词： DOA A Novel DOA Estimation Algorithm with Uncalibrated array

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Beam Learning

Beam Learning

引用

ieee International Conference on Communications (ICC) / Wireless Communications Symposium / 3rd workshop on Optical Wireless Communications (OWC)

作者： Amuru, SaiDhiraj Samsung R&D Inst Bangalore Karnataka India

ISBN: (纸本)9781467389990

Beamforming is the key enabler for wireless communications in the mmWave bands. 802. 11 ad and WiGig are wireless technologies that currently use the 60GHz unlicensed mmWave spectrum via beamforming techniques. Given the widespread study and potential deployments of LTE in the 5GHz unlicensed band, it is likely that 5G systems will be considered for potential deployments in the 60GHz unlicensed spectrum (apart from other unlicensed bands). Therefore, 5G systems must coexist with 802. 11 ad and WiGig in this spectrum. The first step to achieve this co-existence is to find the directions in which the nodes using these incumbent technologies are communicating and eliminate those directions to avoid interference. In this paper, we use multi-armed bandits-based algorithms to blindly detect the beam directions (both along azimuth and elevation i.e., 3D-beamforming) used for communication by the incumbents. Numerical results show the superior performance of these algorithms over techniques that are commonly employed in such blind settings.

关键词： array signal processing signal processing algorithms Antenna arrays 5G mobile communication signal to noise ratio NIST ieee 802.11 Standard

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Multi-sensor signal processing on a PSD matrix manifold

Multi-sensor signal processing on a PSD matrix manifold

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sensor array and multichannel signal processing workshop

作者： Kon Max Wong Jian-Kang Zhang Huiying Jiang Dept of Electrical & Computer Engineering McMaster University Hamilton Canada School of Information Engineering Zhengzhou University Zhengzhou China

ISBN: (纸本)9781509021048

We propose to use the power spectral density (PSD) matrices of the received signals of a multi-sensor system as the feature of processing. PSD matrices have structural constraints and they form a manifold in signal space. We introduce two new Riemannian distance (rd) measures on the PSD matrix manifold and developed algorithms to locate the means and medians of PSD matrices in terms of these rd. These concepts are then applied to the detection of narrow-band sonar signals in noise and the results are encouraging.

关键词： Manifolds Covariance matrices signal processing signal processing algorithms Symmetric matrices Frequency measurement

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