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IEEE International Conference on RFID

作者： G. Matthew Ezovski Steve E. Watkins Adaptive Communications and Signal Processing Group Electrical and Computer Engineering Cornell University Ithaca NY USA Department of Electrical and Computer Engineering University of Missouri Rolla Rolla MO USA

ISBN: (纸本)1424410126;1424410134

Passports and other identification documents may be enhanced using recent advancements in technology. Various national and international bodies are pursuing machine-readable approaches with biometric information. In particular, the international civil aviation organization (ICAO) has adopted standards whereby passports can store biometric identifiers. Countries that participate in the visa waiver program (VWP) began issuing electronic passports in 2006. However, the selection of technologies remains questionable due to privacy and security concerns. This paper examines policy regarding these electronic approaches and developments toward electronic data storage and transmission. Radio-frequency identification (RFID) devices for electronic passports and other existing identity documents are discussed.

关键词： Radiofrequency identification Terrorism Biometrics Standards organizations Integrated circuit technology Privacy Data security Radio frequency National security Pipelines

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Real-time FPGA implementation of a reconfigurable ultrasonic detection system

Real-time FPGA implementation of a reconfigurable ultrasonic...

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IEEE International Conference on Electro-Information Technology

作者： Hojat Parta Erdal Oruklu Jafar Saniie Electrical and Computer Engineering Department Embedded Computing and Signal Processing Research Group (ECASP) Illinois Institute of Technology Chicago IL USA

In this paper, we present hardware realization of a reconfigurable ultrasonic flaw detection system (RUFD) for real-time applications. It can be utilized in diverse environments and applications due to the run-time reconfiguration capability based on the parameters of the ultrasonic transceiver and the target material. Furthermore, this paper presents FPGA implementation results and discusses the steps for optimizing and enhancing the system in terms of the device resources usage and ultimately instrument production cost.

关键词： Real time systems Field programmable gate arrays Narrowband signal processing algorithms Hardware Registers signal processing Runtime computer displays Communication channels

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Denoising for Generalized Sidelobe Canceller

Denoising for Generalized Sidelobe Canceller

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IEEE International Symposium on Circuits and Systems (ISCAS)

作者： C.Y. Ma Tai-Chiu Hsung Daniel Pak-Kong Lun K.C. Ho H.K. Kwan Centre for Multimedia Signal Processing Department of Electronic and Information Engineering Hong Kong Polytechnic University Hong Kong China Department of Electrical and Computer Engineering University of Missouri Columbia Columbia USA Department of Electrical and Computer Engineering University of Windsor ONT Canada

The generalized sidelobe canceller (GSC) efficiently realizes the optimal linearly constrained minimum variance (LCMV) beamformer and delivers excellent beamforming results by reducing directional interference and noise. However, when the input signals are contaminated by other type of noises, such as background and diffused noises, the overall performance of GSC can be even worse than the traditional delay-and-sum beamformers. In this paper, we investigate the application of the spatially adaptive multiwavelet (MWT) denoising technique to the GSC in an environment with severe diffused noise. Comparing with the traditional scalar wavelets, the multiwavelets can better characterize the noise information in the signal such that better denoising performance can be achieved. Different approaches for integrating the GSC and the multiwavelet denoiser were studied. It is found that by adding two denoisers, one to the fixed constrained part and another to the final GSC output, an improvement of 2dB in SNR can be achieved as compared with the traditional GSC method

关键词： Noise reduction Noise cancellation Background noise Interference constraints Working environment noise Noise generators Array signal processing Wiener filter Sensor arrays signal processing

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Blind Extraction of Microsleep Events

Blind Extraction of Microsleep Events

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International Conference on Digital signal processing (DSP)

作者： Wai Yie Leong Danilo P. Mandic Martin Golz David Sommer Communications and Signal Processing Group Electronics and Electrical Engineering Imperial College London UK Department of Computer Science University of Applied Sciences Schmalkalden Schmalkalden Germany

The aim of this study is to detect the occurrence of microsleep events in an overnight driving task. We propose a biosignal analysis method for the detection and extraction of microsleep events. This is achieved by employing blind source extraction method based on a cascaded nonlinear estimator to extract the relevant microsleep events. The cascaded nonlinear estimator jointly estimates the kurtosis and measure the nonlinearity and noise effects within the biosignal. This proposed method was applied to the electroencephalogram and electroculogram recorded of 12 young volunteers while performing monotonic overnight driving in a real car driving simulation laboratory. The extracted microsleep signals can then be used for driving simulation pilot studies for alertness monitoring, and to trigger the activation of alertness countermeasures.

关键词： Brain modeling Electroencephalography Detectors Event detection State estimation Diseases Data mining Fatigue Electrooculography Magnetic heads

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A Fuzzy Membership Function Design Methodology Based on Histogram and ROC Curve Analyses for Broken Rotor Bar Detection

A Fuzzy Membership Function Design Methodology Based on Hist...

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IEEE International Symposium on Industrial Electronics (ISIE)

作者： Bulent Ayhan Mo-Yuen Chow H. Joel Trussell Signal Processing and Control Group Intelligent Automation Inc. Rockville MD USA Department of Electrical and Computer Engineering North Carolina State University Raleigh NC USA

The innovation of this work is the introduction of a novel fuzzy membership function design methodology, which incorporates the issue of the trade-off between the hit and false alarm rates into the design process. The method is applied to two-class broken rotor bar detection problem in squirrel-cage induction motors. The methodology is called H-ROC since it uses a weighted cost function based on ROC (receiver operating characteristics) curve analysis and histogram analysis.

关键词： Design methodology Histograms Rotors Induction motors Fault detection Diagnostic expert systems Process design Frequency Fuzzy systems Cost function

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Novel Applications of Noise in Sensing and Communications

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AIP Conference Proceedings 2007年第1期922卷 405-410页

作者： Laszlo B. Kish Robert Mingesz Zoltan Gingl Gabor Schmera Janusz Smulko Chiman Kwan Peter Heszler Claes‐Goran Granqvist 1Texas A&M University Department of Electrical and Computer Engineering College Station TX 77843‐3128 2University of Szeged Department of Experimental Physics Dom ter 9 Szeged H‐6720 Hungary 3Space and Naval Warfare Systems Center San Diego CA 92152‐5001 4Gdansk University of Technology WETiI ul. G. Narutowicza 11/12 80‐952 Gdansk Poland 5Signal Processing Inc. 13619 Valley Oak Circle Rockville MD 20850 6Research Group of Laser Physics of the Hungarian Academy of Sciences University of Szeged P.O. Box 406 H‐6701 Szeged Hungary 7Department of Engineering Sciences The Ångström Laboratory Uppsala University P.O. Box 534 SE‐751 21 Uppsala Sweden

Recently, it has been shown that excess noises generated or modified by chemical agents can be used to detect and identify chemicals with enhanced sensitivity and selectivity. Moreover thermal noise and its artificial versions (Johnson‐like noises) can be utilized as information carriers with peculiar properties. The first application is called Fluctuation‐Enhanced Sensing. The second class can be called Thermal Noise Informatics with relevant topics are Zero Power Classical Communication and (in the quantum limit) Zero‐Quantum Quantum Communication; Thermal Noise Driven Computing; and Totally Secure Classical Communication. In the paper version of this talk, we will briefly describe the scope of these fields and in the oral talk we also provide extended considerations and results.

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New steganalysis technique for the digital media forensics examiner

New steganalysis technique for the digital media forensics e...

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2006 IEEE Region 5 Conference

作者： Agaian, Sos S. Rodriguez, Benjamin M. Peterson, Gilbert L. Multimedia and Mobile Signal Processing Lab. University of Texas at San Antonio Electrical and Computer Engineering United States Department of Electrical and Computer Engineering Graduate School of Engineering and Management Air Force Institute of Technology United States

ISBN: (纸本)1424403596

Steganographic fmgerprints are convened with the individuality of the steganographic methods. The basic goals of this article are: 1. To evaluate sequential and randomly embedded steganographic evidence within digital images. 2. To identify the "steganographic fmgerprint" of spatial domain based steganographic methods. Steganographic fmgerprinting is the next step towards forensic analysis, reachable only if one may localize steganographic content within an image. The presented detection method works equally well for sequential and random embedding. We will show that the new method may improve the message length estimation, detection accuracy and give an indication of the embedding method. In addition we will show the false alarm rate of 0.9 for the proposed method, while the false alarm rate for the commonly used technique RS Steganalysis is 2.4. ©2006 IEEE.

关键词： Digital storage

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Adaptive Steganographic System for Binary Images using Variable Block Embedding Rate

Adaptive Steganographic System for Binary Images using Varia...

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IEEE International Conference on Systems, Man and Cybernetics

作者： Sos. S. Agaian Ravindranath C. Cherukuri Mobile and Multimedia Signal processing Laboratory Department of Electrical and Computer Engineering University of Texas San Antonio San Antonio TX USA

Due to the rapid developments in multimedia, the demand for binary media (such as signatures, scanned documents and images) based steganographic system has enhanced. In this paper, we present a new data-hiding system that could hide considerable amount of data into a binary digital media. The system modifies the maximum flippable pixels in each block based on certain statistics constraints and characteristic measure of the block. Thus equalizing, the uneven distribution of the flippable pixels through out the embeddable image blocks. We also discuss various issues surrounding the variable block embedding rate and the solution to those issues to make it feasible. The embedded information can be reconstructed without prior knowledge of the cover. The performance of the proposed embedding system with respect to the security and robustness is also discussed. Comparisons with the commonly used embedding systems are also presented for maximum capacity and visual distortion.

关键词： Adaptive systems Steganography Pixel Data security Mobile computing Digital signal processing Laboratories Electronic mail Mobile communication Data encapsulation

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Efficient and automatic abdominal image registration based on active contour

Efficient and automatic abdominal image registration based o...

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作者： Wang, Xiu Ying Ballangan, Cherry Feng, David Group School of Information Technologies F09 University of Sydney NSW 2006 Australia Center for Multimedia Signal Processing Department of Electronic and Information Engineering Hong Kong Polytechnic University Hong Kong School of Computer Science and Technology Heilongjiang University Harbin 150080 China Informatics Department Petra Christian University Indonesia

ISBN: (纸本)9783902661180

Image registration is critical for making diagnostic decision and essential for image-guided surgery. To improve the quality and accuracy of healthcare, efficient registration is highly demanded. However, because of the non-rigid deformations caused by heartbeat and breath, abdominal image registration remains a challenging task. To address these issues, an automatic and elastic registration for abdominal images is proposed. The algorithm is divided into three steps: efficient non-iterative affine registration;elastic motion field extraction based on active contours;elastic registration based on motion field. The validation of the method on monomodality and multimodality abdominal images has demonstrated that the algorithm is reliable and efficient. Copyright © 2006 IFAC.

关键词： Mean square error

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Novel channel and polarization assignment schemes for 2-11 GHz fixed-broadband wireless access networks

Novel channel and polarization assignment schemes for 2-11 G...

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作者： Ntagkounakis, Konstantinos Sharif, Bayan Dallas, Panagiotis School of Electrical Electronic and Computer Engineering University of Newcastle Mertz Court Newcastle upon Tyne NE1 7RU United Kingdom Emerging Technologies and Markets INTRACOM S.A. 19.5 Km Markopoulou Ave. 19002 Peania Greece University of Newcastle United Kingdom INTRACOM S.A. Department of Communications Signal Processing Research Group School of Electrical Electronic and Computer Engineering IEE INTRACOM Advanced Communications Technologies Branch Emerging Technologies and Markets Department

The scarcity of available spectrum in the 2-11 GHz frequency range and the continuously increasing number of users that require broadband communication services suggest that emerging fixed-broadband wireless access (F-BWA) networks will be deployed with aggressive frequency re-use to cope with capacity demands. In this context, co-channel interference may arise in high levels compromising the system's capacity and robust operation. Interference is further increased when limited directionality terminal antennas are employed to support non line-of-sight operation and in the case where an adaptive-time division duplex is selected for efficient radio resource management in asymmetric and time-varying traffic conditions. In this paper frequency channel assignment (CA) and antenna polarization assignment (PA) are considered as a means of mitigating interference. Two novel CA schemes that consider the distinct characteristics of F-BWA are proposed;the rotated-interleaved channel assignment and the non-uniform channel assignment. According to statistical interference simulation analysis the proposed schemes are more efficient in suppressing interference, achieving higher capacity compared to existing schemes while incurring no further complexity. In addition, instead of exploiting the performance of CA and PA schemes independently a framework for a joint CA-PA consideration is presented, where for a particular CA scheme an optimized PA pattern is developed. Results show that this approach improves the CA-PA interoperability increasing the overall performance. The efficiency of the proposed schemes is investigated for both FDD and adaptive-TDD schemes and is verified for various sectorization, frequency re-use and terminal antenna directivity configurations to ensure compatibility with different deployment scenarios. © Springer 2006.

关键词： Wireless telecommunication systems

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