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3rd international conference on Communications and Information Technology (ICCIT)

作者： Ziade, Youmni Wiart, Joe Beirut Arab Univ Tripoli Lebanon Orange Labs Paris France

ISBN: (纸本)9781467353076;9781467353069

We propose to study the time reversal (TR) technique for wireless communications. In a TR application, the time-reversed signal of the channel impulse response (CIR) of the medium is retransmitted back from the base station. Thus a compensation of the multipath effects leads to a space-time focused signal on the receiver position. Spatial focusing allows a concentration of the signal power on the receiver position while reducing it at positions far from the receiver. Temporal focusing reduces echoes of the received signal and simplify its processing. In this paper, we explain the method used for data transmission and we present experimental results.

关键词： multipath channels radio receivers radiocommunication reverberation chambers wireless channels

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Accurate Videogrammetric data for human Limb Movement Research

Accurate Videogrammetric Data for human Limb Movement Resear...

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3rd IEEE international conference on signal and Image processing Applications (ICSIPA)

作者： Chong, Albert K. AL-Baghdadi, Jasim Ahmed Ali Univ So Queensland Toowoomba Qld 4350 Australia Tech Col Baghdad Iraq

ISBN: (纸本)9781479902699;9781479902675

Recently, off-the-shelf HD video cameras are recognized low-cost video capture for the study of human movements associating with sport training, sport performance evaluation, physical impairment evaluation and rehabilitation evaluation. The data required for these applications are usually dimensions, 3D distance, angular elements and speed of movement of the various body components such as the head, trunk and limbs. More complex data include isoline plots, profile and cross-section and 3D textured models of these body parts. This paper focuses on the developed techniques that are used for acquiring high accuracy data for these applications. In the paper, the results of three current case studies are provided to show the quality of the videogrammetric acquired data. The studies show that the techniques developed produce high accuracy data for various applications in movement research.

关键词： image texture video signal processing

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Compressed Sensing data Reconstruction Using Adaptive Generalized Orthogonal Matching Pursuit Algorithm 3

Compressed Sensing Data Reconstruction Using Adaptive Genera...

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3rd international conference on Computer Science and Network Technology (ICCSNT)

作者： Sun, Hui Ni, Lin Univ Sci & Technol China Dept Elect & Informat Sci Hefei Peoples R China

ISBN: (纸本)9781479905614

Compressed sensing (CS), which breaks the limitations of the traditional Nyquist sampling theorem, takes full advantage of the sparse signal characteristics to achieve the accurate reconstruction of the compressed signal. An effective algorithm called GOAMP (Generalized Orthogonal Adaptive Matching Pursuit) algorithm was proposed by studying and summarizing the existing Matching Pursuit algorithm. The GOAMP algorithm can reconstruct the compressed signal exactly when the sparsity of the signal is unknown. Compare to the OMP (Orthogonal Matching Pursuit), the number of columns of the measurement matrix selected at each step is decided by the descent speed of the residual. Then like the OMP and the GOMP (Generalized Orthogonal Matching Pursuit), use the columns (atoms) selected before to reconstruct the original signal. The experiments show that the algorithm can choose the near-optimal iteration step quickly, signal reconstruction quality and efficiency of the algorithm are both ideal.

关键词： signal processing Compressed sensing Sparse representation Orthogonal matching pursuit Image Reconstruction

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Design and implementation of controllable noise source

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Applied Mechanics and Materials 2013年 329卷 283-287页

作者： Zhang, Deng Pan Gao, Zhi Qiang School of Mechanical Engineering Henan Polytechnic University Jiaozuo 454003 China

ISBN: (纸本)9783037857236

To meet the characteristic diversity need of noise source in the product sound quality research, a parameter-controlled noise generation method is presented. The developed method is based on speech signal processing and programming. The system architecture of the controllable noise source is studied, and the implementation method of each module of the system is detailed. Modular design achieves data transfer and parameter control flexibly and conveniently between modules such as system calibration, basic acoustic signal production and conditioning, audio output control. Programming implement a controllable noise source platform based on the Visual C + + with friendly interface and reliable output. © (2013) Trans Tech Publications, Switzerland.

关键词： data transfer

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Wavelet Threshold De-noising Applications in Avionics Test data processing

Wavelet Threshold De-noising Applications in Avionics Test D...

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3rd international conference on Instrumentation & Measurement, Computer, Communication and Control (IMCCC)

作者： Tian, Feng Sun, Jian Shao, Shan Shenyang Aerosp Univ Automat Shenyang Peoples R China Shenyang Aircraft Design & Res Inst Shenyang Peoples R China

ISBN: (纸本)9780769551227

In the avionics test, sensor signal samplings are often subjected to the interference of all kinds of noise, which could not accurately reflect the real operating status of the equipment and should not be directly used for data processing and analysis. In order to de-noise test data, a new threshold function is presented and the preprocessing wavelet is determined by reconstruction factor according to the characteristics of avionics test data through wavelet transform. Compared with other two improved functions, this new threshold function has a better effect in MATLAB simulation.

关键词： wavelet de-noising threshold function reconstruction factor avionics test

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Development of a Semi-Automated Segmentation Framework for Thoracic-Abdominal Organs

Development of a Semi-Automated Segmentation Framework for T...

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3rd IEEE international conference on signal and Image processing Applications (ICSIPA)

作者： Abd Rahni, Ashrani Aizzuddin Lewis, Emma Wells, Kevin Univ Kebangsaan Malaysia Dept Elect Elect & Syst Engn Fac Engn & Built Environm Ukm Bangi 43600 Selangor Malaysia Univ Surrey Ctr Vis Speech & Signal Guildford GU27XH Surrey England

ISBN: (纸本)9781479902699;9781479902675

Due to the increasing amount of data available from medical imaging procedures and also the increase in computing power, there has been a rise in the automation of the analysis of such data. A crucial step in the automation of such procedures is accurate segmentation of anatomy. Popular approaches include model based segmentation. However, these approaches require an atlas which may not be generic enough. This paper proposes a semi-automated data-driven segmentation framework of thoracic CT scans. The preliminary results of the framework is presented and discussed with proposals for future work.

关键词： computerised tomography image segmentation medical image processing

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A High Density Low Cost Digital signal processing Module for Large Scale Radiation Detectors

A High Density Low Cost Digital Signal Processing Module for...

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3rd international conference on Advancements in Nuclear Instrumentation, Measurement Methods and their Applications (ANIMMA)

作者： Tan, Hui Hennig, Wolfgang Walby, Mark D. Breus, Dimitry Harris, Jackson T. Grudberg, Peter M. Warburton, William K. XIA LLC Hayward CA 94544 USA

ISBN: (纸本)9781479910465;9781479910472

A 32-channel digital spectrometer PIXIE-32 is being developed for nuclear physics or other radiation detection applications requiring digital signal processing with large number of channels at relatively low cost. A single PIXIE-32 provides spectrometry and waveform acquisition for 32 input signals per module whereas multiple modules can be combined into larger systems. It is based on the PCI Express standard which allows data transfer rates to the host computer of up to 800MB/s. Each of the 32 channels in a PIXIE-32 module accepts signals directly from a detector preamplifier or photomultiplier. Digitally controlled offsets can be individually adjusted for each channel. signals are digitized in 12-bit, 50 MHz multi-channel ADCs. Triggering, pile-up inspection and filtering of the data stream are performed in real time, and pulse heights and other event data are calculated on an event-by event basis. The hardware architecture, internal and external triggering features, and the spectrometry and waveform acquisition capability of the PIXIE-32 as well as its capability to distribute clock and triggers among multiple modules, are presented.

关键词： Gamma-ray Spectrometer Multi-channel ADC Detector Arrays

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Electrical Power Measurement Using Arduino Uno Microcontroller and LabVIEW

Electrical Power Measurement Using Arduino Uno Microcontroll...

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3rd international conference on Instrumentation, Communications, Information Technology, and Biomedical Engineering (ICICI-BME)

作者： Fransiska, R. W. Septia, E. M. P. Vessabhu, W. K. Frans, W. Abednego, W. Hendro Bandung Inst Technol Dept Phys Bandung Indonesia

ISBN: (纸本)9781479916498;9781479916504

In this research, studies have been conducted in making wattmeter which is interfaced with a personal computer utilizing Arduino microprocessor and LabVIEW program. This study consists of conditioning analog signals, converting the analog signal into a digital signal (ADC), and digital data processing. This wattmeter displays voltage, electric current, power consumption, energy use, frequency of the power source, and the usage fees calculation. It can measure device that uses AC voltage above 46 VRMS or DC voltage which is multiplication of 0.66 Volt, and has power between 2 to 1200 W.

关键词： Wattmeter Arduino LabVIEW Computerized Measurement signal Conditioning

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COMPLETE processing CHAIN FOR 3D VIDEO GENERATION USING KINECT SENSOR

COMPLETE PROCESSING CHAIN FOR 3D VIDEO GENERATION USING KINE...

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3rd international conference on 3D Imaging (IC3D)

作者： Joachimiak, Michal Hannuksela, Miska M. Gabbouj, Moncef Tampere Univ Technol Dept Signal Proc FIN-33101 Tampere Finland Nokia Res Ctr Tampere Finland

ISBN: (纸本)9781479932030

The multiview-video-plus-depth (MVD) format selected for 3D video standardization describes 3D scene by video and associated depth and enables generation of virtual views through the depth-image-based rendering (DIBR) process. The Kinect (TM) sensor is equipped with a red-green-blue (RGB) camera and a depth sensor and it is suitable to capture synchronous video and depth streams. However, these sensors do not produce data with pixel-wise correspondence that is required by the DIBR process. In this paper we describe the process to use the Kinect device for MVD data creation. The processing includes sensor calibration, rectification of depth and texture, depth projection to the RGB camera pose, joint depth map filtering, and final projection to virtual view. As a part of this processing we describe a novel joint median filtering method that mitigates artifacts on object edges in the synthesized view, caused by depth to texture misalignments. The process presented in this paper produces an unpaired MVD representation of 3D scene, which can be utilized for enabling advanced 3D video applications.

关键词： Kinect depth map filtering joint median filter view synthesis 3D video generation

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FPGA Implementation of Optimized Independent Component Analysis Processor For Biomedical Application

FPGA Implementation of Optimized Independent Component Analy...

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3rd international conference on Computer Communication and Informatics (ICCCI)

作者： Ranjith, Jayasanthi Muniraj, N. J. R. Anna Univ Coimbatore TN India Tejaa Sakthi Inst Technol Women Coimbatore Tamil Nadu India

ISBN: (纸本)9781467329071;9781467329064

Independent component analysis (ICA) is a statistical signal processing technique for separation of mixed voices, images and signal. The basic idea of ICA is to find the underlying independent components in the mixture by searching for a linear or nonlinear transformation and minimizing the statistical dependence between components. Due to the computational complexity of ICA and commonly used data sets, the ICA process is very time-consuming. For reducing the complexity of ICA algorithm, modularity, hierarchy and parallelism are introduced in VLSI implementation. It is more efficient when the cost function, which measures the independence of the components, is optimized. System level design of ICA with evolutionary optimization algorithm is proposed for EEG signal processing. The use of evolutionary computation based optimizations i.e Adaptive Shuffled Frog Leap Optimization Algorithm with additional operations of mutation, crossover and feedback resolves the permutation ambiguity to a large extent [8]. This ensures the convergence of the algorithm to a global optimum and its VLSI implementation ensures high speed processing.

关键词： ICA Statistical signal processing VLSI Evolutionary optimization Shuffled frog leap algorithm

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