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4th International Symposium on Communications, Control, and signal Processing, ISCCSP-2010

作者： Jaber, Marwan A. Massicotte, Daniel Electrical and Computer Engineering Department Laboratory of Signal and System Integrations Université du Québec Trois-Rivières QC G9A 5H7 Canada

ISBN: (纸本)9781424462858

The Discrete Fourier Transform (DFT) is a mathematical procedure that stands at the center of the processing that takes place inside a Digital signal Processor. It has been known and argued through the literatures that the Fast Fourier Transform (FFT) is useless in detecting a specific frequency in a monitored signal because most of the computed results are ignored. In this paper we will present an efficient FFT based method to detect specific frequencies in a monitored signal which is compared to the most frequently used method "the Goertzel's Algorithm". Parallel implementation structure show a fast computation method compared to the Goertzel's algorithm. Computational speedup gains of r using radix-r butterfly are shown. ©2010 IEEE.

关键词： Digital signal processors

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A 23-nA Quiescent Current Output-Capacitorless LDO Regulator for IoT Devices 15

A 23-nA Quiescent Current Output-Capacitorless LDO Regulator...

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15th IEEE International Conference on ASIC, ASICON 2023

作者： Zhou, Shengnan Mao, Xiangyu Huang, Cheng Martins, Rui P. Lu, Yan University of Macau State Key Laboratory of Analog and Mixed-Signal VLSI Institute of Microelectronics and FST-DECE China Iowa State University Department of Electrical and Computer Engineering Ames United States

ISBN: (纸本)9798350312980

This paper presents an ultra-low quiescent current output-capacitorless low dropout regulator (OCL-LDO) with fast transient response. We design a rail-to-rail error amplifier with improved adaptive biasing, which provides a limited bias current at heavy load for better load regulation. The buffer with adaptive biasing and almost zero input-output voltage shift and embedded body-bias, combines the error amplifier and the gate of MP. The proposed LDO is designed in a 65-nm CMOS process. Simulation result shows that the proposed LDO consumes a quiescent current of only 23 nA at a supply voltage of 0.8 V. The voltage undershoot is 98 mV during a 20-mA maximum load transient. And we obtain a FOMT of 0.00023 ps. © 2023 IEEE.

关键词： adaptive biasing internet of things Output-capacitorless LDO rail-to-rail buffer ultra-low quiescent current

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Enhancing MPEG-4 CELP by jointly optimized inter/intra-frame LSP predictors

Enhancing MPEG-4 CELP by jointly optimized inter/intra-frame...

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IEEE Workshop on Speech Coding Proceedings

作者： K. Koishida J. Linden V. Cupermann A. Gersho Signal Compression Laboratory Department of Electrical and Computer Engineering University of California Santa Barbara CA USA University of California Santa Barbara Santa Barbara CA US

This paper presents an LSP quantization design method for bandwidth scalable coders such as the MPEG-4 CELP coder. In the enhancement layer of these coders, the LSP parameters are quantized using both interframe and intraframe predictors. The proposed design algorithm enables us to jointly optimize these predictors. Objective and subjective test results show that the quantizer obtained with the proposed algorithm provides better performance than that used in the MPEG-4 CELP.

关键词： MPEG 4 Standard Speech enhancement Wideband Bandwidth Quantization Laboratories Scalability Narrowband Design methodology Testing

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Some advances in cognitive informatics

Some advances in cognitive informatics

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IEEE International Conference on Cognitive Informatics

作者： W. Kinsner Signal and Data Compression Laboratory Department of Electrical and Computer Engineering and the Institute of Industrial Mathematical Sciences and Telecommunications Research Laboratories TRLaboratories University of Manitoba Winnipeg MAN Canada

This paper summarizes a few recent developments in cognitive informatics, with special emphasis on signal processing for autonomic computing and its metrics.

关键词： Cognitive informatics signal processing Biomedical measurements Pollution measurement Fractals Acoustic noise Biological materials Biomedical materials Cognition Humans

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High speed systems engineering: A new trent in electrical and computer engineering

High speed systems engineering: A new trent in electrical an...

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2005 ASEE Annual Conference and Exposition: The Changing Landscape of engineering and Technology Education in a Global World

作者： Mina, Mani Weber, Robert Somani, Arun K. VanderHorn, Nathan Bahuguna, Rashmi High Speed Systems Engineering Laboratory Department of Electrical and Computer Engineering Iowa State University United States Iowa State University United States Analog and Mixed-Signal VLSI Design Center United States

The main ideas and objectives of High Speed Systems engineering (HSSE) are presented. HSSE is being used as integrating pedogogical and research platforms to train modern engineers and future researchers. The newly developed classes and the changes made in the curriculum is enhancing interaction between faculty, graduate and undergraduate students. A study shows that HSSE has been successful in encouraging students from all undergraduate levels to participate in learning and experimenting, also are encouraged to be involved in research and graduate studies.

关键词： Systems engineering

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Resilient subclass discriminant analysis with application to prelens tear film interferometry

Resilient subclass discriminant analysis with application to...

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Lecture Notes in computer Science

作者： Boyer, Kim L. Wu, Dijia Signal Analysis and Machine Perception Laboratory Department of Electrical Computer and Systems Engineering Rensselaer Polytechnic Institute Troy NY United States Siemens Corporate Research Princeton NJ United States

ISBN: (纸本)9783642215865

The study of tear film thickness and breakup has important implications for understanding tear physiology and dynamics. We have developed a complete end-to-end automated system for robust and accurate measurements of the tear film thickness from interferometric video as a function of position and time (following a blink). This paper will primarily address the problem of identifying dry regions on the surface of the contact lens, which is one of the four major components of the system. (The others are motion stabilization, image normalization, and phase demodulation to infer absolute thickness and map the surface. To address the challenging wet/dry segmentation problem, we propose a new Gaussian clustering method for feature extraction in high dimensional spaces. Each class is modeled as a mixture of Gaussians, clustered using Expectation-Maximization in the lower-dimensional Fisher's discriminant space. We show that this approach adapts to a wide range of distributions and is insensitive to training sample size. We present experimental results on the real-world problem of identifying regions of breakup (drying) of the prelens tear film from narrowband interferometry for contact lens wearers in vivo. © 2011 Springer-Verlag Berlin Heidelberg.

关键词： Feature extraction

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DC MUX PUF:A Highly Reliable Feed-Back MUX PUF Based on Measuring Duty Cycle 12

DC MUX PUF:A Highly Reliable Feed-Back MUX PUF Based on Meas...

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2017 IEEE 12th International Conference on ASIC

作者： Yunhao Xu Yingjie Lao Weiqiang Liu Xiaohu You Chuan Zhang Lab of Efficient Architectures for Digital-communication and Signal-processing(LEADS) National Mobile Communications Research Laboratory Southeast University Department of Electrical and Computer Engineering Clemson University College of Electronic and Information Engineering Nanjing Uni.Aero.& Astro.

ISBN: (纸本)9781509066261;9781509066254

Ring oscillator physical unclonable function(RO PUF) and multiplexer physical unclonable function(MUX PUF)are the two mostly used structures that make use of gate delay,but their reliability is not satisfactory *** this paper,a new structure,duty cycle multiplexer physical unclonable function(DC MUX PUF) is proposed to improve the reliability.A feed-back structure is added to original MUX PUF and decision method is also changed by measuring duty *** a simplified model is built to calculate the reliability of DC MUX PUF,a primary Monte Carlo simulation with this model is *** reliability of DC MUX PUF and the original MUX PUF are compared,and it is suggested that DC MUX PUF performs better than original MUX PUF considering noise *** temperature variation is considered,and simulated by *** is suggested that reliability of them are both above 95% when temperature *** and randomness are all more than 90%.Then the complexity of two kinds of PUF are also taken into *** challenge length becomes long,complexity of this design is relatively lower than original MUX PUF.

关键词： Physical unclonable function feed-back MUX PUF Monte Carlo model reliability

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Progressive transmission of images through fractal surface interpolation

Progressive transmission of images through fractal surface i...

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Canadian Conference on electrical and computer engineering (CCECE)

作者： R. Dansereau W. Kinsner TR Laboratories (Telecommunications Research Laboratories) Winnipeg MAN Canada Department of Electrical and Computer Engineering Signal and Data Compression Laboratory University of Manitoba Winnipeg MAN Canada

This paper presents a progressive image transmission technique based on fractal surface interpolation (FSI). This technique is an extension of our previous work, and relies on the extraction and reconstruction of self-affine fractal surfaces with specified Hurst exponents, H/sup */. Fractional Brownian motion (fBm) through midpoint displacement (MPD) provides the basis for generating these surfaces between interpolation points. Progressive transmission is achieved by ordering increasing levels of detail within the FSI representation. This allows for quicker recognition of the transmitted or reconstructed image within the first 5 percent of the transmission process.

关键词： Fractals Interpolation Surface reconstruction Image reconstruction Brownian motion Image coding Data compression Laboratories Image communication Image recognition

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Two-Stage Adaptive Noise Cancellation for Intermittent-signal Applications

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IEEE Transactions on Information Theory 1980年第6期26卷 746-750页

作者： Gardner, William A. Agee, Brian G. Signal and Image Processing Laboratory Department of Electrical and Computer Engineering University of California Davis CA 95616 United States ARGOSystems Inc. Sunnyvale CA 94086 884 Hermosa Court United States

A novel two-stage adaptive signal extractor for intermittent signal applications is presented. If the presence and absence of the signal can be detected, the first stage will adapt only while the signal is absent and thereby effect a reduction in noise, whereas the second stage will adapt only when the signal is present and thereby effect a reduction in the distortion caused by the first stage. Bounds on performance are derived, and performance improvement relative to a conventional one-stage adaptive noise canceller is assessed. © 1980, IEEE

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compression of aerial ortho images based on image denoising

Compression of aerial ortho images based on image denoising

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Data compression Conference (DCC)

作者： A. Langi W. Kinsner TR Laboratories Telecommunications Research Laboratories Winnipeg MAN Canada Department of Electrical and Computer Engineering Signal and Data Compression Laboratory University of Manitoba Winnipeg MAN Canada

Abstract only given. Discusses the compression of an important class of computer images, called aerial ortho images, that result from geodetic transformation computations [Kinsner, 1994]. The computations introduce numerical noise, making the images nearly incompressible losslessly because of their high entropy. The use of classical lossy compression schemes is also not desirable because their effects on the original image are unknown. We then propose the use of image denoising coupled with lossless image compression, that preserves selected image characteristics. Two denoising schemes for a compression ratio of 2:1 are compared. The first scheme is based on a Donoho's (1992) wavelet shrinking scheme which preserves image smoothness. We study the effect of various shrinking parameter values on the compression ratio and image quality, where 35.5 dB peak signal-to-noise ratio (PSNR) is obtained for a compression ratio of 2.03:1. This approach preserves high-frequency information, so that sharp edges do not become blurred as in classical filtering methods. This is critically important, because the main feature of ortho images is in its flatness and its precision of edge position. The second scheme is based on preserving pixel predictability [Kostelich and Schreiber, 1993), leading to a variant of planar predictive coding. This approach adds, to the edge preserving capability, the limitation in pixel deviation between the original and denoised images to be within one grayscale level. As a result, two different predictive coding schemes achieve a compression ratio of 2:1 at 49.9 dB and 51.2 dB PSNR.

关键词： Image coding Image denoising PSNR Predictive coding Entropy Noise reduction Image quality Information filtering Information filters Pixel

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