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Proceedings of the Latin American Web Congress (LA-Web)

作者： R. Matushima D.M. Hiramatsu R.M. Silveira W.V. Ruggiero C.E.M. da Costa M.M. Monteiro C. Hatori LARC-Laboratory of Computer Architecture and Networks Department of Computer and Digital System Engineering Escola Politécnica da Universidade de São Paulo Brazil Department of Computer Engineering and Digital System Escola Politécnica da Universidade de São Paulo Brazil Fundaćão Padre Anchieta Radio e TV Cultura Sao Paulo Brazil

This paper describes a music searching system based on an automatic indexing process created over a pattern recognition tool and MPEG-7 standard. We present a complete analysis of the involved technologies integration process and show a reference measure in the feasibility of this kind of application not only in the research environment but also in the production of real systems.

关键词： MPEG 7 Standard Pattern recognition Indexing TV Data mining computer networks Digital systems systems engineering and theory Libraries Humans

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Low power CMOS re-programmable pulse generator for UWB systems

Low power CMOS re-programmable pulse generator for UWB syste...

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IEEE Conference on Ultra Wideband systems and Technologies

作者： K. Marsden Hyung-Jin Lee Dong Ha Hyung-Soo Lee Department of Electrical and Computer Engineering VTVT (Virginia Tech VLSI for Telecommunications) Lab Blacksburg VA USA Radio and Broadcasting Laboratory Electronics and Telecommunications Research Institute Yuseong-Gu Daejon Korea

In this paper we discuss the design of a CMOS based pulse generator for impulse-based UWB systems. The basic structure of our design involves a power amplifier with four control taps, which essentially decides the shape of the generated pulse. The design is versatile and may be used in a variety of UWB modulation schemes and systems. In addition, this design can also be incorporated into a multiband approach as a rectified cosine generator.

关键词： Pulse generation Pulse amplifiers CMOS technology Silicon germanium Germanium silicon alloys Power amplifiers Costs Shape control Pulse shaping methods Schottky diodes

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A frequency-domain approach for all-digital CMOS ultra wideband receivers

A frequency-domain approach for all-digital CMOS ultra wideb...

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IEEE Conference on Ultra Wideband systems and Technologies

作者： Hyung-Jin Lee Dong Ha Hyung-Soo Lee VTVT (Virginia Tech VLSI for Telecommunications) Laboratory Department of Electrical and Computer Engineering Virginia Polytechnic Institute and State University Blacksburg VA USA Radio and Broadcasting Laboratoly Electronics and Telecommunications Research Institute Daejeon South Korea

ISBN: (纸本)0780381874

In this work, we propose a new approach to process received signals in the frequency-domain, which opens the possibility for CMOS implementation of all-digital ultra wideband receivers. The key idea for the proposed method is to extract the frequency components of the received signal and to perform signal processing in the frequency domain. The proposed receiver architecture relaxes the speed requirement of analog-to-digital converters and is highly suitable for a multipath rich environment such as UWB. Our simulation results indicate that the proposed receiver improves the SNR by about 3 dB at BER=10/sup -1/ when compared with an analog receiver under multi-path channel conditions.

关键词： Ultra wideband technology Frequency domain analysis RAKE receivers Sampling methods Signal processing Analog-digital conversion CMOS technology Clocks Laplace equations Noise measurement

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Doppler diversity for OFDM wireless mobile communications. Part I: frequency domain approach

Doppler diversity for OFDM wireless mobile communications. P...

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IEEE Conference on Vehicular Technology (VTC)

作者： Byung-Chul Kim I-Tai Lu System Architecture Design Laboratory TN Business Samsung Electronics Company Limited Suwon Gyeonggi South Korea Department of Electrical and Computer Engineering Polytechnic University Melville NY USA

ISBN: (纸本)0780377575

A novel frequency domain Doppler diversity technique for OFDM systems is proposed. The received OFDM signal is first frequency shifted to generate various diversity branches. After demodulation, branch outputs are individually weighted and added together. For Doppler spread signal, it alters fading statistics and improves the bit error rate. Extensive simulations show that combining three diversity branches with proper frequency shifts reduces BER by an order when the normalized Doppler spread is larger than 0.3.

关键词： OFDM Wireless communication Mobile communication Frequency domain analysis Diversity reception Frequency diversity Bit error rate Signal generators Demodulation Fading

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Human systems integration and advanced technology in engineering department workload and manpower reduction

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NAVAL ENGINEERS JOURNAL 2003年第1期115卷 57-65页

作者： Lively, KA Seman, AJ Kirkpatrick, M KENNETH A. LIVELY graduated from the University of Colorado with a BS in applied mathematics and an MS in mathematics in 1976 and from the Massachusetts Institute of Technology with an MS in electrical engineering and the degree ocean engineer in naval architecture and marine engineering in 1984. He retired from the U.S. Navy in 1989 after 23 years of service. Assignments included electrical officer on the USS Constellation (CV 64) project engineer for the DDG 51 machinery control system (NAVSEA) and DDG 51 Technical Director (NAVSEA). He was vice president of the PDI Division of Bird-Johnson Company from July 1989 to November 1998 where he managed various gas turbine and machinery controls related development projects. He joined Anteon Corporation's Systems Engineering Group as senior controls engineer in December 1998 where he provided technical support to the integrated power systems program (NAVSEA PMS 510) and managed the Office of Naval Research Afloat Laboratory. DR. MARK KIRKPATRICK is currently an independent consultant in human factors and work-load/manning analysis and modeling. He holds a Ph.D. degree in experimental psychology from The Ohio State University and has 34 years of experience in applied human factors. From 1982 through 2000 Dr. Kirkpatrick served as the senior vice president of Carlow International. Prior to joining Carlow in 1982 Dr. Kirkpatrick served as a member of the technical staff at North American Rockwell's Missiles Division and as a project director and vice president for Essex Corporation. His areas of expertise include workload simulation task analysis operator-in-the-loop simulation human performance experimentation statistical analysis and human factors T&E. He has directed and/or participated in human factors projects for the U.S. Navy U.S. Army NASA Department of Transportation the U.S. Nuclear Regulatory Commission and private industry. ANTHONY J. SEMAN III is the technical manager for the reduced ship's crew by virtual presence (RSVP) advanced technology d

Aboard current ships, such as the DDG 51, engineering control and damage control activities are manpower intensive. It is anticipated that, for future combatants, the workload demand arising from operation of systems under conditions of normal steaming and during casualty response will need to be markedly reduced via automated monitoring, autonomous control, and other technology initiatives. Current DDG 51 class ships can be considered as a manpower baseline and under Condition III typical engineering control involves seven to eight watchstanders at manned stations in the Central Control Station, the engine rooms and other machinery spaces. In contrast to this manning level, initiatives such as DD 21 and the integrated engineering plant (IEP) envision a partnership between the operator and the automation system, with more and more of the operator's functions being shifted to the automation system as manning levels decrease. This paper describes some human systems integration studies of workload demand reduction and, consequently, manning reduction that can be achieved due to application of several advanced technology concepts. Advanced system concept studies in relation to workload demand are described and reviewed including. Piecemeal applications of diverse automation and remote control technology concepts to selected high driver tasks in current DDG 51 activities. Development of the reduced ship's crew by virtual presence system that will provide automated monitoring and display to operators of machinery health, compartment conditions, and personnel health. The IEP envisions the machinery control system as a provider of resources that are used by various consumers around the ship. Resource needs and consumer priorities are at all times dependent upon the ship's current mission and the availability of equipment pawnbrokers.

关键词： Naval warfare

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In order issue out-of-order execution floating-point coprocessor for CalmRISC32

In order issue out-of-order execution floating-point coproce...

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computer Arithmetic (ARITH)

作者： Cheol-Ho Jeong Woo-Chan Park Tack-Don Han Sang-Woo Kim Moon-Key Lee Media System Laboratory Department of Computer Science Yonsei University Seoul South Korea MCU Team System LSI Division Samsung Electronics Company Limited Yongin si South Korea VLSI and CAD Laboratory Department of Electrical Engineering Yonsei University Seoul South Korea

ISBN: (纸本)0769511503

The CalmRISC32 FPU (Floating-Point Unit) is a RISC coprocessor for embedded system applications. It supports IEEE-754 standard single precision floating-point addition, floating-point subtraction, floating-point multiplication, floating-point division, format conversion, comparison, rounding, load, store, etc. It also supports four rounding modes, and precise exception. It can execute and complete instructions out of order, if constraints such as data dependency, resource conflict, and exception prediction are resolved. Standard cell-base design techniques were used to reduce design time and expense. The first prototype operated at approximately 70 MHz with the worst-case delay in gate level simulation.

关键词： Out of order Coprocessors Pipelines Embedded system Delay Laboratories Microprocessors Floating-point arithmetic Hardware Large scale integration

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Performance of smart antennas with adaptive combining at handsets for the 3GPP W-CDMA system

Performance of smart antennas with adaptive combining at han...

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IEEE Conference on Vehicular Technology (VTC)

作者： Suk Won Kim Dong Sam Ha Jeong Ho Kim Jung Hwan Kim Department of Electrical and Computer Engineering. Virginia Tech. Blacksburg VTVT (Virginia Tech VLSI for Telecommunications) Laboratory Virginia USA Department of Electrical and Computer Engineering. Virginia Tech. Blacksburg VTVT (Virginia Tech VLSI for Telecommunications) Laboratory Blacksburg Virginia USA Next Generation Wireless Communication Research Laboratory LG Electronics Inc. Kyongki-do Korea System Engineering Department University of Arkansas at Little Rock 2801 S. University Avenue Little Rock Arkansas USA

ISBN: (纸本)0780370058

We present the performance gain of dual smart antennas with adaptive combining at handsets for the 3GPP W-CDMA system. The adaptive algorithm based on the normalized least-mean-square (N-LMS) algorithm is employed, in which antenna weights are recursively obtained. To obtain the channel profile, we adopted the GBSB (geometrically based single bounce) elliptical and circular models. The simulation results show that the dual smart antenna system with adaptive combining performs better than a single antenna system and its performance gain is 3.3 dB for the GBSB elliptical model at BER of 5/spl times/10/sup -2/ and 5.5 dB for the GBSB circular model. The higher performance gain is achieved as the mobile velocity decreases.

关键词： Adaptive arrays Telephone sets Multiaccess communication Diversity reception Interference Performance gain Signal processing Base stations Costs Energy consumption

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FULL-WAVE SOLUTION OF DIELECTRIC LOADED WAVE-GUIDES AND SHIELDED MICROSTRIPS UTILIZING FINITE-DIFFERENCE AND THE CONJUGATE-GRADIENT METHOD

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INTERNATIONAL JOURNAL OF MICROWAVE AND MILLIMETER-WAVE computer-AIDED engineering 1991年第4期1卷 346-357页

作者： NARAYANAN, V MANELA, M LADE, RK SARKAR, TK Department of Electrical and Computer Engineering Syracuse University Syracuse New York 13244-1240 Viswanathan Narayanan was born in Bangalore India on December 14 1965. He received the BE degree in Electronics and Communications from B.M.S. College of Engineering Bangalore in 1988. He joined the Department of Electrical Engineering at Syracuse University for his graduate studies in 1989 where he is currently a research assistant. His research interests are in microwave measurements numerical electromagnetics and signal processing. Biographies and photos are not available for M. Manela and R. K. Lade. Tapan K. Sarkar (Sf69-M'76-SM'X1) was born in Calcutta. India on August 2 1948. He received the BTech degree from the Indian Institute of Technology Kharagpur India in 1969 the MScE degree from the University of New Brunswick Fredericton Canada in 1971. and the MS and PhD degrees from Syracuse University. Syracuse NY in 1975. From 1975-1976 he was with the TACO Division of the General Instruments Corporation. He was with the Rochester Institute of Technology (Rochester NY) from 1976-1985. He was a Research Fellow at the Gordon Mckay Laboratory Harvard University Cambridge MA from 1977 to 1978. He is now a Professor in the Department of Electrical and Computer Engineering Syracuse University. His current research interests deal with numerical solutions of operator equations arising in electromagnetics and signal processing with application to system design. He obtained one of the “ best solution” awards in May 1977 at the Rome Air Development Center (RADC) Spectral Estimation Workshop. He has authored or coauthored more than 154 journal articles and conference papers and has written chapters in eight books. Dr. Sarkar is a registered professional engineer in the state of New York. He received the Best Paper Award of the IEEE Transactions on Electromagnetic Compatibility in 1979. He was an Associate Editor for feature articles of the lEEE Antennas arid Propagation Sociefy Newsletter and was

Dynamic analysis of waveguide structures containing dielectric and metal strips is presented. The analysis utilizes a finite difference frequency domain procedure to reduce the problem to a symmetric matrix eigenvalue problem. Since the matrix is also sparse, the eigenvalue problem can be solved quickly and efficiently using the conjugate gradient method resulting in considerable savings in computer storage and time. Comparison is made with the analytical solution for the loaded dielectric waveguide case. For the microstrip case, we get both waveguide modes and quasi-TEM modes. The quasi-TEM modes in the limit of zero frequency are checked with the static analysis which also uses finite difference. Some of the quasi-TEM modes are spurious. This article describes their origin and discusses how to eliminate them. Numerical results are presented to illustrate the principles.

关键词： Waveguides

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computer-system architecture CONCEPTS FOR FUTURE COMBAT systemS

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NAVAL ENGINEERS JOURNAL 1990年第3期102卷 43-62页

作者： ZITZMAN, LH FALATKO, SM PAPACH, JL Dr. Lewis H. Zitzman:is the group supervisor of the Advanced Systems Design Group Fleet Systems Department The Johns Hopkins University Applied Physics Laboratory (JHU/APL). He has been employed at JHU/APL since 1972 performing applied research in computer science and in investigating and applying advanced computer technologies to Navy shipboard systems. He is currently chairman of Aegis Computer Architecture Data Bus and Fiber Optics Working Group from which many concepts for this paper were generated. Dr. Zitzman received his B.S. degree in physics from Brigham Young University in 1963 and his M.S. and Ph.D. degrees in physics from the University of Illinois in 1967 and 1972 respectively. Stephen M. Falatko:was a senior engineering analyst in the Combat Systems Engineering Department Comptek Research Incorporated for the majority of this effort. He is currently employed at ManTech Services Corporation. During his eight-year career first at The Johns Hopkins University Applied Physics Laboratory and currently with ManTech Mr. Falatko's work has centered around the development of requirements and specifications for future Navy systems and the application of advanced technology to Navy command and control systems. He is a member of both the Computer Architecture Fiber Optics and Data Bus Working Group and the Aegis Fiber Optics Working Group. Mr. Falatko received his B.S. degree in aerospace engineering with high distinction from the University of Virginia in 1982 and his M.S. degree in applied physics from The Johns Hopkins University in 1985. Mr. Falatko is a member of Tau Beta Pi Sigma Gamma Tau the American Society of Naval Engineers and the U.S. Naval Institute. Janet L. Papach:is a section leader and senior engineering analyst in the Combat Systems Engineering Department Comptek Research Incorporated. She has ten years' experience as an analyst supporting NavSea Spa War and the U.S. Department of State. She currently participates in working group efforts under Aegis Combat System Doctrin

This paper sets forth computer systems architecture concepts for the combat system of the 2010–2030 timeframe that satisfy the needs of the next generation of surface combatants. It builds upon the current Aegis computer systems architecture, expanding that architecture while preserving, and adhering to, the Aegis fundamental principle of thorough systems engineering, dedicated to maintaining a well integrated, highly reliable, and easily operable combat system. The implementation of these proposed computer systems concepts in a coherent architecture would support the future battle force capable combat system and allow the expansion necessary to accommodate evolutionary changes in both the threat environment and the technology then available to effectively counter that threat. Changes to the current Aegis computer architecture must be carefully and effectively managed such that the fleet will retain its combat readiness capability at all times. This paper describes a possible transition approach for evolving the current Aegis computer architecture to a general architecture for the future. The proposed computer systems architecture concepts encompass the use of combinations of physically distributed, microprocessor-based computers, collocated with the equipment they support or embedded within the equipment itself. They draw heavily on widely used and available industry standards, including instruction set architectures (ISAs), backplane busses, microprocessors, computer programming languages and development environments, and local area networks (LANs). In this proposal, LANs, based on fiber optics, will provide the interconnection to support system expandability, redundancy, and higher data throughput rates. A system of cross connected LANs will support a high level of combat system integration, spanning the major warfare areas, and will facilitate the coordination and development of a coherent multi-warfare tactical picture supporting the future combatant command st

关键词： computer architecture

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