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检索条件"主题词=Interpolation algorithm"

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Research on Pilot-Aided Channel Estimation Techniques in OFDM System

Research on Pilot-Aided Channel Estimation Techniques in OFD...

引用

7th International Conference on Wireless Communications, Networking and Mobile Computing (WiCOM)

作者： Zhang Zhenchuan Ma Mingzhuo Northeastern Univ Sch Informat Sci & Engn Shenyang 110004 Peoples R China

ISBN: (纸本)9781424462520

Channel estimation is a key technology in wireless communication field, and estimation method based on pilot is one of the most common methods. To improve the performance of Channel estimation in OFDM system, different estimation algorithms are studied and an improved interpolation algorithm is proposed. The simulation results show that the improved interpolation algorithm can effective against spectrum leakage and has much lower BER.

关键词： OFDM Channel Estimation Pilot interpolation algorithm

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ESTIMATING PARAMETERS OF MULTIPLE DAMPED COMPLEX SINUSOIDS WITH MODEL ORDER ESTIMATION

ESTIMATING PARAMETERS OF MULTIPLE DAMPED COMPLEX SINUSOIDS W...

引用

IEEE International Workshop on Signal Processing Systems (SiPS)

作者： Kocherry, Donna L. Ye, Shanglin Aboutanios, Elias Univ New South Wales Sch Elect Engn & Telecommun Sydney NSW 2052 Australia

ISBN: (纸本)9781509033614

The estimation of the parameters of damped complex sinusoids is a classic research problem that has been studied extensively. State-of-art high resolution estimators for this problem suffer from certain drawbacks including high computational complexity and the necessity of model order information. In this work, we develop an efficient estimation algorithm to overcome these issues. Specifically, we combine the recently proposed Multi-tone Iterative Windowed A&M (MIWAM) algorithm, a high performance method capable of estimating the frequencies and complex amplitudes of multiple complex sinusoids in white Gaussian noise, with a model order estimation strategy that is based on information theory criteria. We demonstrate through extensive simulations that the novel method achieves more reliable performance while requiring less computations than high resolution algorithms.

关键词： Frequency estimation interpolation algorithm model order estimation information theory criteria

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The FPGA realization of a real-time Bayer image restoration algorithm with better performance

The FPGA realization of a real-time Bayer image restoration ...

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International Symposium on Optoelectronic Technology and Application (IPTA) - Image Processing and Pattern Recognition

作者： Ma, Huaping Liu, Shuang Zhou, Jianyong Tang, Zunlie Deng, Qilin Zhang, Hongliu 44th Inst China Elect Technol Grp Corp Chongqing 400060 Peoples R China Univ Elect Sci & Technol China Sch Optoelect Infroamt Natl Key Lab Elect Thin Films & Integrated Device Chengdu 610054 Peoples R China

ISBN: (纸本)9781628413878

Along with the wide usage of realizing Bayer color interpolation algorithm through FPGA, better performance, real-time processing, and less resource consumption have become the pursuits for the users. In order to realize the function of high speed and high quality processing of the Bayer image restoration with less resource consumption, the color reconstruction is designed and optimized from the interpolation algorithm and the FPGA realization in this article. Then the hardware realization is finished with FPGA development platform, and the function of real-time and high-fidelity image processing with less resource consumption is realized in the embedded image acquisition systems.

关键词： FPGA interpolation algorithm Bayer color filter array

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An Demosaicing algorithm Based on Edges 8

An Demosaicing Algorithm Based on Edges

引用

Proceedings 2015 8 International Congress on Image and Signal Processing (CISP)

作者： Tian, Qichuan Xue, Huijie Liu, Zihua Zhang, Enpu Beijing Univ Civil Engn & Architecture Coll Elect & Informat Engn Beijing Engn Res Ctr Monitoring Construct Safety Beijing 100044 Peoples R China

ISBN: (纸本)9781467390989

Digital cameras have become the most important imaging devices in all kinds of Hand-held devices. In these devices, the quality of image reconstruction is an important indicator of the overall quality of the end-user experience image, and the image resolution is a mainly parameter of Digital cameras. Usually, only incomplete color information of the scene is measured at each pixel location by the CCD sensor, so that the Digital camera will have a low production cost. A true color image can be outputted by estimating all unknown color components, and we named the estimation process "Demosaicing". A single chip image sensor is consisted of different color-pass filtering unit that is named CFA (Color Filter Array). Because there is only a kind of color sensor at the pixel position in CFA, the mosaic phenomenon of an entire image is serious. In order to remove the mosaic phenomenon, the unknown other two kinds of color information need to be reconstructed in each pixel. In the paper, our demosaicing algorithm is proposed to deliver high quality image based on CFA edge information. The algorithm is used to reconstruct a three-color image by analyzing local spatial gradient information of a CFA. The test results show that our algorithm is effectiveness for improving the phrase Peak Signal to Noise Ratio (PSNR) and the quality of image reconstruction.

关键词： demosaicing color filter array interpolation algorithm

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A Mechanism for Continuous Object Boundary Region Detection and Prediction in hybrid WSN 27

A Mechanism for Continuous Object Boundary Region Detection ...

引用

27th IEEE International Symposium on Industrial Electronics (ISIE)

作者： Zhang, Yaqiang Yi, Xuefang Zhou, Zhangbing Shu, Lei China Univ Geosci Sch Informat Engn Beijing Peoples R China Nanjing Agr Univ Nanjing Peoples R China TELECOM SudParis Comp Sci Dept Paris France

ISBN: (纸本)9781538637050

This article proposes a novel mechanism for continuous object boundary region detection. Different from others work, we work on a fog computing environment where a few sensor nodes are deployed. This means that sensing holes may exist in network regions. Based on sensory data, we interpolate on network region and find a predicted object boundary line. To cover sensing holes and detect the real boundary, mobile sensors are adopted to traverse the selected stops on boundary line. Last sensory data gathered by mobile sensors help to draw a more precise boundary area. Experimental evaluation shows that the proposed technique can detect a precise object boundary region timely and sensor nodes can work in an energy-efficient manner.

关键词： Mobile Sensors Object Boundary Detection interpolation algorithm Wireless Sensor Networks

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Intelligent Valve Electric Actuator Based on ARM

Intelligent Valve Electric Actuator Based on ARM

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2nd International Symposium on Test Automation and Instrumentation

作者： Huang Chunying Li Peipei Wang Xiaojun Peng Xuange Jinggangshan Univ Jian 343009 Jiangxi Peoples R China

ISBN: (纸本)9787506292207

It is very difficult to achieve the ideal results for the traditional PID control as the uncertainty of the input valve opening control, and it is also difficult to establish the accurate mathematical models as the controlled process non-linear and time-delay. A kind of electric actuator is designed, which is based on 32-bit ARM embedded RISC microprocessor and the improved fuzzy interpolation algorithm. The results indicate that the key techniques about flexible switch, valve-limit position judgment, motor protection, precision positioning and analogue signal isolation can achieve good control. Compared with the traditional valve electric actuator, the accuracy and reliability of the control process have been improved with small size, high reliability, high precision, low-cost features.

关键词： Electric actuator ARM fuzzy control interpolation algorithm

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A New Keystone Correction algorithm of The Projector 8

A New Keystone Correction Algorithm of The Projector

引用

International Conference on Management of e-Commerce and e-Government (ICMeCG)

作者： Ye, Yuan Shanghai Univ Int Business & Econ Sch Business Informat Management Shanghai Peoples R China

ISBN: (纸本)9781479965434

In order to solve the keystone distortion of images when a projector is used. A new algorithm transforming pixel spatial position using edge preserving interpolation is proposed to implement projector keystone correction. First, the scaling factors, the start point positions and the end point positions are calculated according to different rows, then the edge preserving interpolation algorithm are used according to the space positions. Experimental results demonstrate that the algorithm can not only implement keystone correction, but also preserves the edge effectively. It can be used in the chip of projector video processing.

关键词： projector keystone correction interpolation algorithm edge preserving

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ITERATIVE WINDOWED PARAMETER ESTIMATION OF MULTIPLE SUPERIMPOSED DAMPED EXPONENTIALS IN NOISE 23

ITERATIVE WINDOWED PARAMETER ESTIMATION OF MULTIPLE SUPERIMP...

引用

23rd European Signal Processing Conference (EUSIPCO)

作者： Ye, Shanglin Aboutanios, Elias Univ New S Wales Sch Elect Engn & Telecommun Sydney NSW Australia

ISBN: (纸本)9780992862633

The research problem of the parameter estimation of multiple superimposed damped complex exponentials in noise is of significant importance in many engineering and science applications. In this paper, we propose a simple yet accurate estimator to address the problem. By combining an efficient windowed frequency and damping estimator for a single component with an iterative leakage subtraction scheme, the novel method consecutively and iteratively estimates one component at a time by gradually reducing the leakage introduced by other components presented. Simulation results are presented to verify that the proposed algorithm is capable of outperforming state-of-art time and frequency domain algorithms.

关键词： Parameter estimator damped exponential interpolation algorithm nuclear magnetic resonance spectroscopy

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Automatic Modeling algorithm Research and Application of Complex Structural Geology in Three-dimensional Space

Automatic Modeling Algorithm Research and Application of Com...

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6th International Conference on Wireless Communications, Networking and Mobile Computing (WICOM)

作者： Peng, Juan Hu, Jianping Dai, Hualin TJUCI TianJin Inst Urban Construct Elect & Informat Engn Dept Tianjin Peoples R China

ISBN: (纸本)9781424437092

A simple model of layered structural geological bodies already have more mature solutions, while the complex structure modeling and interpolation algorithm of three-dimensional space are becoming the key difficulties. Discussion in the paper not only realize the special geological interpolation processing, also makes the local Kriging interpolation in a variety of geological body model of the scope of application in practice which uses the drawing tool OpenGL.

关键词： Kriging interpolation algorithm geological body OpenGL

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Flow Field Super-Resolution Method Based on Graph Neural Networks for Wing Profiles 5

Flow Field Super-Resolution Method Based on Graph Neural Net...

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5th International Conference on Computer Engineering and Application (ICCEA)

作者： Wu, Pin Xu, Liji Liu, Zhitao Feng, Weibing He, Yaolong Shanghai Univ Shanghai Frontier Sci Ctr Mechanoinformat Sch Comp Engn & Sci Shanghai Peoples R China Shanghai Univ Sch Comp Engn & Sci Shanghai Peoples R China Shanghai Univ Shanghai Frontier Sci Ctr Mechanoinformat Sch Mech & Engn Sci Shanghai Peoples R China

ISBN: (纸本)9798350386783;9798350386776

The primary objective of flow field super-resolution technology is to enhance the resolution of flow field data while simultaneously reducing computational resource requirements through computational simulations and data processing methods. Building upon prior research, this study introduces a novel flow field super-resolution method composed of three essential components: an interpolation module, graph data preprocessing, and a graph neural network, referred to as RGHF. Within the interpolation module, the radial basis function interpolation method is employed. Furthermore, a pioneering graph convolution operation named GConv is introduced in the graph neural network and prediction modules. This approach effectively leverages low-resolution data to predict high-resolution data, resulting in reduced computational time while maintaining an acceptable level of precision. Experimental results on the RAE2822 airfoil dataset demonstrate an 81% reduction in computational time, along with robustness across varying flight conditions.

关键词： Graph Neural Network Flow Field Super-Resolution interpolation algorithm

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