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1st International conference on Structural Integrity (ICONS)

作者： Dib, Gerges Karpenko, Oleksii Haq, Mahmoodul Udpa, Lalita Udpa, Satish Michigan State Univ Elect & Comp Engn Dept Nondestruct Evaluat Lab E Lansing MI 48822 USA Michigan State Univ Composite Vehicle Res Ctr E Lansing MI 48910 USA

Damage detection using Lead-Zirconate-Titanate (PZT) transducers for exciting guided waves was investigated. The analytical model for guided wave excitation using PZT transducers was used in a Finite Element Model for simulating guided waves in a thin aluminum plate with various defect depths. The fundamental symmetric (S-0) mode was excited, and four sensors were placed for detecting both the reflected and transmitted waves from defects. The model was used to conduct a parametric study of the effect of the PZT adhesive bonding on the measured signal and hence probability of detection (POD). The model was also used for optimizing signal analysis algorithms, particularly for the case of multiple overlapping modes due to mode conversion from defects. A mode decomposition algorithm is proposed for separating the reflected/transmittedS(0)mode from the mode converted antisymmetric mode (A(0)). The signal processing algorithms were optimized to maximize the POD. (C) 2014 The Authors. Published by Elsevier Ltd.

关键词： Guided waves probability of detection structural health monitoring mode decomposition PZT

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advanced Results Demonstrating that Lévy Firefly Bio-Inspired algorithms Can Improve Fetal Electrocardiogram (FECG) Adaptive signal processing 58

Advanced Results Demonstrating that Lévy Firefly Bio-Inspir...

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58th Asilomar conference on signals, Systems and Computers, ACSSC 2024

作者： Jenkins, W.K. Radhakrishnan, C. School of Electrical and Computer Engineering Pennsylvania State University University ParkPA United States University of Illinois Dept. of Elec. and Comp. Engr. Urbana-ChampaignIL United States

ISBN: (纸本)9798350354058

Previously published results demonstrated that a sequential combination of adaptive linear prediction configuration (LPC), adaptive noise cancellation (ANC), and adaptive comb filtering (CF) can effectively remove maternal interference from noninvasive fetal ECGs. More recent research results have verified that the bio-inspired Lévy Flight Firefly Algorithm (LFFA) can be effectively applied to many different forms of linear and non-linear adaptive filter structures, including low sensitivity IIR adaptive structures that could not be used with steepest descent adaptive algorithms due to their adaptive multimodal characteristics. This paper presents results when using the LFFA algorithm in various stages of the FECG sequential combination processing. © 2024 IEEE.

关键词： Adaptive filtering

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DESIGN OF A FULL-FEATURED, SOLID-STATE TELEPHONE ANSWERING DEVICE

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IEEE TRANSACTIONS ON CONSUMER ELECTRONICS 1989年第3期35卷 681-686页

作者： FERRIS, G AIZNER, M DSP Group Inc. Emeryville CA USA

The authors discuss the use of advanced digital signal processing (DSP) algorithms to implement sophisticated audio processing functions and microcontroller tasks on a low-cost digital signal processor, enabling OEM (original equipment manufacturer) vendors to build cost-effective solid-state telephone answering devices. Sophisticated data compression algorithms and a low-cost programmable DSP processor were used to develop a powerful set of telephone-answering-machine chips. The DSP-based chip sets have been integrated in devices that offer incoming message recording times from 5 to 25 min, outgoing messages, time/date voice stamping and many other advanced features. A key to the project was finding application areas where DSP software could replace the traditional hardware while providing higher performance at lower cost. Speech processing along with telephony provided that environment. Aspects of hardware and software design are discussed.

关键词： Speech processing Telephone ORIGINAL EQUIPMENT MANUFACTURER incoming data optoelectronic module Digital signal processors Computer hardware chip set HIGH-PERFORMANCE signal processor Compression algorithms

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High Symbol Rate signal Generation and Detection With Linear and Nonlinear signal processing

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JOURNAL OF LIGHTWAVE TECHNOLOGY 2018年第2期36卷 408-415页

作者： Zhang, Junwen Yu, Jianjun Chien, Hung-Chang ZTE TX Inc Morristown NJ 07960 USA

Digital signal processing is the core functional block in beyond-100G transmission systems with a high symbol rate and/or high spectral efficiency. We review recent progress on high symbol rate signal generation and detection, and corresponding advanced algorithms for signal equalization and compensation at the transmitters (Tx) and the receivers (Rx), respectively. Thanks to the joint Tx-side optical pre-equalization (pre-EQ) and Rx-side partial response maximum likelihood sequence estimation, significant performance improvement can be achieved by reducing the penalty caused by bandwidth limitations of the optical and electronic components. A joint pre-EQ and look-up table predistortion technique is also reviewed in this paper, which is demonstrated to be an effective method for mitigating devices' nonlinearity impairment. We exemplify how these advanced algorithms enable high symbol rate beyond-100G transmission systems with signal generation based on either electronic time-division multiplexing or digital-to-analog converters.

关键词： Digital signal processing equalization long-haul transmission high symbol rate signal

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Integrating novel methodologies, tools, and IT resources for graduate level courses in high performance computing and advanced signal processing algorithms

Integrating novel methodologies, tools, and IT resources for...

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International conference on Information Technology Based Higher Education and Training, ITHET

作者： D.A. Rodriguez N.G. Santiago Domingo A. Rodriguez Automated Information Processing Group University of Puerto Rico MayagÜez USA Nayda G. Santiago Parallel and Distributed Processing Group University of Puerto Rico MayagÜez USA

This work presents an approach at integrating novel methodologies for teaching graduate level courses in the areas of high performance computing (HPC) and advanced signal processing algorithms (ASPA) for computer engineering and computer science and engineering curricula. The novel teaching methodology presented here in high performance computing centers on the use of innovative empirical methods, i.e., exploratory data analysis, experiment design, etc., for studying computer performance, whereas an operator signal algebra approach is considered a novel methodology for the studying of advanced signal processing algorithms. The work also discusses an on going concerted effort at utilizing common tools and IT resources in both courses to provide students a holistic learning experience.

关键词： High performance computing signal processing algorithms Education Computer science Data analysis signal design Algorithm design and analysis Computer performance signal processing Algebra

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advanced READ CHANNELS FOR MAGNETIC DISK DRIVES

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IEEE TRANSACTIONS ON MAGNETICS 1994年第6期30卷 3807-3812页

作者： HOWELL, TD ABBOTT, WL FISHER, KD Quantum Corporation Milpitas CA USA

advanced read channels which sample the read signal and process those samples using algorithms borrowed from the communications industry allow us to reach higher storage densities and faster data rates than ever before. In this paper we describe some of the design issues involved in using a PRML (partial-response, maximum-likelihood) channel in a disk drive employing thin-film heads, zoned-recording, and embedded servo sectors. We discuss the effect of high transition densities required far a PRML channel on the design of heads and media. Finally, we survey some additional: signal processing methods which might-lead to even higher performance in the future.

关键词： Disk drives Magnetic heads signal processing Maximum likelihood detection Servomechanisms Detectors Magnetic recording Decision feedback equalizers Transistors Intersymbol interference

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Random, Deterministic, and Hybrid algorithms for Distributed Beamforming

Random, Deterministic, and Hybrid Algorithms for Distributed...

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5th advanced Satellite Multimedia Systems conference / 11th signal processing for Space Communications Workshop (ASMS/SPSC)

作者： Thibault, Ilaria Corazza, Giovanni E. Deambrogio, Lina Univ Bologna ARCES DEIS Viale Risorgimento 2 I-40136 Bologna Italy

ISBN: (纸本)9781424468331

Distributed beamforming is a form of cooperation among nodes in a wireless network to efficiently deliver a common message to a distant receiver. The critical requirement to achieve electromagnetic coherence is to synchronize the initial phases of all local oscillators, introducing minimal overhead and complexity. In the paper we introduce random, deterministic and hybrid algorithms, all based on feedback from the common receiver as the driving force, but with different phase update strategies. Our numerical results show that these algorithms achieve faster convergence time than previously proposed approaches.

关键词： array signal processing deterministic algorithm distant receiver distributed beamforming electromagnetic coherence feedback hybrid algorithm local oscillator message delivery radio networks radio receivers random algorithm wireless network

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Compensating frequency drift in DPSK systems via baseband signal processing

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IEEE TRANSACTIONS ON COMMUNICATIONS 1997年第8期45卷 921-924页

作者： Choi, ZY Lee, YH Department of Electrical Engineering Korea Advanced Institute of Science and Technology Taejon South Korea

A new baseband signal processing method for compensating frequency shift in differential phase-shift keying (DPSK) systems is introduced, This method consists of a signal processor for the initial acquisition of frequency shift and a simple adaptive equalizer for tracking, The former is based on the observation that the effect of frequency shift can be eliminated by using boundary values of the received baseband signal between symbol periods, The latter is a single tap equalizer employing the least mean-square (LMS) adaptation algorithm, Computer simulation results demonstrate that the proposed frequency shift compensation technique outperforms existing methods, and works well for a wide range of frequency shift.

关键词： Differential quadrature phase shift keying Baseband Adaptive signal processing Frequency shift keying Differential phase shift keying signal processing Adaptive equalizers Least squares approximation signal processing algorithms Computer simulation

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Implementation of signal processing algorithms for 3G and beyond

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IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS 2003年第8期13卷 302-304页

作者： Hausner, J Denk, R Infineon Technol AG D-81609 Munich Germany

For communication systems of third generation and beyond, the algorithmic complexity will increase significantly compared with 2G and 2.5G systems, as we can see from the example of channel estimation. The answer to t... 详细信息

关键词： multi-access communication multipath channels signal processing

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A USER-FRIENDLY ENVIRONMENT FOR THE GENERATION OF HIGHLY PORTABLE SOFTWARE IN COMPUTER-BASED INSTRUMENTATION

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IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT 1990年第6期39卷 864-866页

作者： RUSSO, F BROILI, S Dipattimento Elettrotecnica Elettronica Informatica Universita degli Studi di Trieste Triest Italy

An innovative development environment for the generation of libraries of routines for digital signal processing (DSP) is presented. Significant aspects of this environment are advanced user friendliness and the wide portability of the results. These resources allow the user to implement new algorithms quickly and to use the software on different systems. The environment allows the user to implement algorithms by writing mathematical formula expressions with onscreen graphic representation and generates the corresponding source-code routines in a highly portable language. The C language was selected for its wide diffusion and portability.

关键词： user friendliness Digital signal processing computer programs algorithms Consumers Portability C language image representation Environments computer software Libraries

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