| Achieving Last-Mile Broadband Access With Passive Optical Networking Technology |
SEP 2002 |
101 pages |
| Authors:
Jason L. Schwartz; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
 | One of the primary challenges in today's computer networking world is providing enough bandwidth to achieve true broadband access in the local, or last-mile, access network. Over the course of the last decade or so, there has been a tremendous increase in the bandwidth of the core network in the U.S. In fact, a substantial portion of this core network, which primarily consists of fiber optic technology, is unused. This ... |
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| Generic Bluetooth Data Module |
SEP 2002 |
|
| Authors:
Ali M. Aljuaied; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
 | Sensors are being used in many industrial and military applications. The most common ones are temperature and pressure sensors. Communicating with sensors has long been limited either to wired connections between the sensing element and the control station or to expensive, proprietary wireless communications protocols. The emerging Bluetooth technology enables fast, efficient sensor communication, which eliminates wired connections and the associated manual tasks of initiating, checking, and changing sensor connections. ... |
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| Direct-Sequence Spread-Spectrum Modulation for Utility Packet Transmission in Underwater Acoustic Communication Networks |
SEP 2002 |
|
| Authors:
Peter S. Duke; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| This thesis investigates the feasibility and performance of using Direct-Sequence Spread-Spectrum (DSSS) modulation for utility-packet transmission in Seaweb underwater wireless acoustic communications networks, Seaweb networks require robust channel-tolerant utility packets having a low probability of detection (LPD) and allowing for multi-user access, MATLAB code simulated the DSSS transmitter and receiver structures and a modeled channel impulse response represented the underwater environment, The specific modulation scheme implemented is direct-sequence, differentially encoded ... |
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| A Limited Objective Experiment on Wireless Peer-To-Peer Collaborative Networking |
SEP 2002 |
10 pages |
| Authors:
Alex Bordetsky; Glenn R. Cook; Bill Kemple; Timothy Thate; NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF INFORMATIONAL SCIENCES
|
| The implications of using peer-to-peer communications within an urban environment are significant for military applications. From a networking perspective, the use of wireless technologies to support collaborative communications may have impacts on bandwidth and spectrum utilization. This paper explores the effects of wireless peer-to-peer (P2P) network behavior on the performance of collaboration support applications. The results achieved during the limited objective experiment conducted by the Naval Postgraduate School demonstrate significant ... |
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| Distributed Computing and Collaboration Framework (DCCF) |
SEP 2002 |
12 pages |
| Authors:
Cheryl D. Putnam; LorRaine Duffy; SPACE AND NAVAL WARFARE SYSTEMS CENTER SAN DIEGO CA
|
| The Distributed Computing and Collaboration Framework has been developed by the Space and Naval Warfare Systems Center, San Diego (a Naval research and development facility), under the sponsorship of the Office of Naval Research. The focus of the effort is to provide superior performance in "low bandwidth-high latency network conditions," a hallmark of Naval operational environments. The software development includes a variety of mechanisms to manage and reduce latencies, with ... |
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| Using Data Compression to Increase the Bandwith of Existing Tactical Control System - Content Based Compression |
AUG 2002 |
3 pages |
| Authors:
M. J. Varga; M. Vant; QINETIQ LTD WORCESTERSHIRE (UNITED KINGDOM)
|
| The aim of the presentation was to show the benefits in applying the 'intelligent' image compression technique in military application. The idea is to use image understanding to structure the applied compression so as to ensure that the compression process does not corrupt the militarily 'important' information contained within the image, while still attaining high compression ratios. The system characteristics correspond to clearly identified military requirements and has been evaluated ... |
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| PHOCI: Photonic Communications Imager |
19 JUL 2002 |
16 pages |
| Authors:
Dale E. Martin; Darryl S. Dieckman; Phillip A. Wilsey; CLIFTON LABS INC CINCINNATI OH
|
| PHOCI is an optical imaging system that is suitable for both image capture and reception of optical communications data. The system includes a novel image/data capture chip that imbeds a high-speed optical data communications receiver technology into the image capture array of a digital video camera system. In addition to the development of a new image/data capture chip, the system includes the design of a hardware interface that allows the ... |
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| Link Budget Analysis for Undersea Acoustic Signaling |
JUN 2002 |
59 pages |
| Authors:
Joseph T. Hansen; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Link-budget analysis is commonly applied to satellite and wireless communications for estimating signal-to-noise ratio (SNR) at the receiver. Link- budget analysis considers transmitter power, transmitter antenna gain, channel losses, channel noise, and receiver antenna gain. For underwater signaling, the terms of the sonar equation readily translate to a formulation of the link budget. However, the strong frequency dependence of underwater acoustic propagation requires special consideration, and is represented as an ... |
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| Fuselet Design and Implementation: A Practical Framework for the Creation of the Joint Battlespace Infosphere |
JUN 2002 |
35 pages |
| Authors:
Eric Jones; Basil Krikeles; Howawrd Reubenstein; Dan Bostwick; ALPHATECH INC BURLINGTON MA
|
| In this effort, two fuselet authoring tools were developed and incorporated in a demonstration system utilizing AFRL's Adaptive Sensor Fusion (ASF) technology for data communication and component encapsulation. Fuselet components created by the authoring tools fall into two categories: adaptor fuselets and correlator fuselets. These fuselets were demonstrated in the context of a Joint Battlespace Infosphere (JBI) operational scenario. |
|
| Test Methods for Telemetry Systems and Subsystems. Volume 2. Test Methods for Telemetry RF Subsystems |
JUN 2002 |
330 pages |
| Authors:
RANGE COMMANDERS COUNCIL WHITE SANDS MISSILE RANGE NM TELEMETRY GROUP
|
| The Telemetry Group of the Range Commanders Council (RCC) has prepared this document to provide common methods for testing radio frequency (RF) equipment. Figure 1-1, RF/System Measurements and Data Flow Diagram, is included to serve as a guide for recommended tests to verify equipment status. The use of common methods should minimize problems when organizations exchange test results. Other volumes of this document address test methods for recorder/ reproducer systems ... |
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| Performance Analysis of a Secure IEEE 802.11B Wireless Network Incorporating Personal Digital Assistants |
JUN 2002 |
151 pages |
| Authors:
John L. Camp; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Research results of this thesis indicate very poor performance of a Wireless Local Area Network (WLAN) utilizing PDAs. Network throughput is adversely effected most by VPN implementation and slightly by increased file size. The client distance factor has virtually no effect on the throughput. The impact of each of these factor levels is small when compared to the magnitude of the overall mean throughput (<6%). The average network throughput with ... |
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| The Commercial Space Segment and The Need for Control |
13 MAY 2002 |
22 pages |
| Authors:
E. S. Hoffman; NAVAL WAR COLL NEWPORT RI JOINT MILITARY OPERATIONS DEPT
|
| With the current and projected continuance of the military's dependence upon the commercial space segment, it is imperative that the United States develops a strategy that regains the initiative and enables the attainment of an information superiority capability. It is critical to the United States that it maintains a position of information superiority across the spectrum of military operations. The access to commercial satellite systems will be a critical but ... |
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| Integrating Modern Staff Communications into an Effective Staff Action Model |
09 APR 2002 |
28 pages |
| Authors:
Frederick J. Gargiulo; ARMY WAR COLL CARLISLE BARRACKS PA
|
| Electronic mail, or email, is a relatively new method of communication that has joined the telephone and letter as one of the top three preferred methods of communication in the corporate, defense and private sectors since the Internet has reached market dominance. Although there are great advantages and efficiencies made available by the proliferation of email, its ease of use and capability of nearly instantaneous global contact allows users to ... |
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| Energy Efficient Network Protocols for Wireless and Mobile Networks |
01 APR 2002 |
11 pages |
| Authors:
Krishna M. Sivalingam; WASHINGTON STATE UNIV PULLMAN WA SCHOOL OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCE
|
| This research project studied the design, analysis and implementation of energy efficient (also called power aware) network protocols for wireless and mobile networks. In particular, we focused on the medium access control, scheduling, reservation signaling, and transport protocols. The research considered two different types of networks: infrastructure networks, where a central base station coordinates the mobile users' network communications, and self-organizing networks where the mobile users form a self-organize network ... |
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| 2.5 Gb/s Chaotic Optical Communication |
21 MAR 2002 |
|
| Authors:
S. Tang; J. M. Liu; CALIFORNIA UNIV LOS ANGELES DEPT OF ELECTRICAL ENGINEERING
|
| Digital signal at 2.5 Gb/s bit-rate has been successfully transmitted in a chaotic communication system. The communication quality and capacity are both shown to be very high with this chaotic pulsing semiconductor laser system, which indicates that chaotic communication with several Gb/s bit-rate is feasible with semiconductor lasers. ANNOTATION: Reprint: 2.5 Gb/s Chaotic Optical Communication |
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| Evaluation and Mission-Specific Optimization of Satellite Packet Telemetry Protocol for Use on DoD Flight Test Ranges |
MAR 2002 |
185 pages |
| Authors:
Beth A. Trapp; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| The DoD test range community has come to the realization that its telemetry abilities are obsolete. Efforts are therefore underway to improve telemetry systems at DoD test ranges. The overall objective of this project was to evaluate the practical use of the CCSDS packet telemetry protocol in DoD test ranges and determine the configuration that would maximize performance based on mission requirements. A secondary objective was to compare the CCSDS ... |
|
| Free Space Optics and Wireless Broadband Radio Frequency Technology: Bringing High-Speed Network Access to the Last Mile |
MAR 2002 |
83 pages |
| Authors:
John W. Sprague; NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF COMPUTER SCIENCE
|
| Existing copper phone and cable infrastructure no longer provide the required broadband for today's emerging applications. Homes and businesses in the "last mile" require the same access to broadband speeds available inside the fiber optic ring. It is not economically feasible, however, to bring fiber optic cable to each and every home and business in the "last mile." Free Space Optics and Wireless Broadband Radio Frequency are two technologies gaining ... |
|
| Low Cost Modular Telemetry for Coastal Time-Series Data |
11 FEB 2002 |
|
| Authors:
Daniel E. Frye; W. R. Geyer; Bradford Butman; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA DEPT OF APPLIED OCEAN PHYSICS AND ENGINEERING
|
| The purpose of this project was to develop and demonstrate a low cost, easy to operate system for collecting and disseminating coastal ocean data. The system that was developed uses acoustic modems to transfer data from instruments on the seafloor to small surface buoys or existing navigation buoys that are equipped with acoustic receivers and RF links. Data received by the buoy's acoustic receiver are forwarded via the RF link ... |
|
| Demonstration of a 100 GBIT/S (GBPS) Scalable Optical Multiprocessor Interconnect System Using Optical Time Division Multiplexing |
FEB 2002 |
26 pages |
| Authors:
Paul R. Prucnal; Stephen R. Forrest; PRINCETON UNIV NJ
|
| Theoretical and an experimental demonstration of an error free 100 Gbit/s optical time division multiplexing (ODM) broadcast star computer interconnect has been performed. A highly scalable novel node design provides rapid inter-channel switching capability on the order of the single channel bit period (1.6 ns). The scalability for optical multichannel networks and interconnects is an important design issue to accommodate an ever growing number of users. It is therefore important ... |
|
| Content Analysis of Video Sequences |
FEB 2002 |
4 pages |
| Authors:
Michael Orchard; Robert Joyce; PRINCETON UNIV NJ DEPT OF ELECTRICAL ENGINEERING
|
| Content analysis of video sequences is a critical component of virtually any application involving the management of large video data sets. Systems for managing video databases or transmitting large numbers of video sequences are most efficient if they incorporate some understanding of the video content. The required analysis must be automated if large volumes of video are to be accommodated. This report presents two contributions of this project to problems ... |
|
| Supporting QOS in Mobile Networks |
31 JAN 2002 |
30 pages |
| Authors:
Andrew T. Campbell; Mischa Schwartz; COLUMBIA UNIV NEW YORK DEPT OF ELECTRICAL ENGINEERING
|
| Research includes new "stateful" and "stateless" quality of service (QOS) architectures, services, and algorithms for the delivery of audio, video, and web data over mobile ad hoc networks (MANETs). Major research contributions include the design, development, analysis, and evaluation of three new protocols that address the problem of MANET QOS at different points in the solution space. The INSIGNIA protocol represents a new "stateful" QOS architecture that requires per-flow soft-state ... |
|
| Space Fed Subarray Synthesis Using Displaced Feed Location |
15 JAN 2002 |
4 pages |
| Authors:
Robert J. Mailloux; AIR FORCE RESEARCH LAB HANSCOM AFB MA SENSORS DIRECTORATE
|
| Wideband space-fed subarray systems are often proposed for large airborne or spaceborne scanning array applications. These systems allow the introduction of time delay devices at the subarray input terminals while using phase shifters in the array face. This can sometimes reduce the number of time delayed controls by an order of magnitude or more. The implementation of this technology has been slowed because the feed network, usually a Rotman Lens ... |
|
| Multi-Antenna Communications over Rapidly Fading Channels Estimation and Space-Time Coding |
14 JAN 2002 |
6 pages |
| Authors:
Georgios B. Giannakis; MINNESOTA UNIV MINNEAPOLIS DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
| This 3-year project dealt with development and testing of efficient algorithms for modeling and (blind) estimation of time-varying communication channels, and the resulting (self-recovering) antenna receivers and equalizers in rapidly fading mobile battlefield scenarios. Highlights of recent results include space-time coded transmit- and receive-diversity to combat noise, oscillator drifts, and Doppler effects; optimal wedding of beamforming with space-time coding; space-time-frequency coding for use over frequency-selective channels; space-time-Doppler coding for time-selective ... |
|
| Completion and Field Demonstration of a Portable Coastal Observatory |
01-Jan-2002 |
|
| Authors:
Daniel E Frye; Bradford Butman; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA
|
| The goal of this project is to complete the development and field demonstration of an affordable, easy to use technology for the real time collection and dissemination of data from instruments deployed in the coastal ocean. The observing system that has been developed consists of four elements: a low-cost acoustic data link that transfers data from instruments on the bottom or in the water column to a nearby surface buoy, ... |
|
| Front Resolving Observational Network with Telemetry (FRONT) |
Jan 2002 |
9 pages |
| Authors:
James O'Donnell; Dan Codiga; Christopher Edwards; David Ullman; David Hebert; Joseph Rice; Edward Levine; Petra Steggman; Ivar Babb; CONNECTICUT UNIV GROTON MARINE SCIENCES INST
|
| The Front Resolving Observational Network with Telemetry (FRONT) experiment is designed to evaluate the feasibility of making useful coastal ocean forecasts with a coarse array of instruments that telemeter data in near-real time for use in an assimilative numerical model. Direct observations are used to evaluate the model predictions. The FRONT site is a portion of continental shelf south of the eastern end of Long Island, New York. Historical observations ... |
|
| Formally Verifying Data and Control With Weak Reachability Invariants |
2002 |
17 pages |
| Authors:
Jeffrey Su; David L. Dill; Jens U. Skakkebaek; STANFORD UNIV CA COMPUTER SYSTEMS LAB
|
| Existing formal verification methods do not handle systems that combine state machines and data paths very well. Model checking deals with finite-state machines efficiently, but model checking full designs is infeasible because of the large amount of state in the data path. Theorem-proving methods may be effective for verifying data path operations, but verifying the control requires finding and proving inductive invariants that characterize the reachable states of the system. ... |
|
| Phased Array Technology and Allerton |
2002 |
5 pages |
| Authors:
Robert J. Mailloux; AIR FORCE RESEARCH LAB HANSCOM AFB MA SENSORS DIRECTORATE
|
| For the past fifty years the Antenna Applications Symposium at Allerton has provided a podium for engineers to discuss all aspects of antenna engineering. This paper addresses the subject of phased array development, and catalogs some of the papers presented at Allerton that have contributed to this development. |
|
| Filter Banks for Cyclic-Prefixing the Nonuniform DMT System |
2002 |
5 pages |
| Authors:
P. P. Vaidyanathan; Bojan Vrcelj; CALIFORNIA INST OF TECH PASADENA DEPT OF ELECTRICAL ENGINEERING
|
| The cyclic prefix system is used in discrete multitone channels for frequency domain equalization. This is based on the inversion of samples of the channel frequency response at uniformly spaced points (DFT coefficients). In this paper we consider nonuniformly spaced samples of the channel frequency response, especially ocatve-spaced. The anticipated advantage is that for channels with rapidly decaying frequency responses, there are relatively fewer equalizer coefficients with unduly large values, ... |
|
| When Are On-Off Sources SIS? Conditions and Applications |
2002 |
29 pages |
| Authors:
Sarut Vanichpun; Armand M. Makowski; MARYLAND UNIV COLLEGE PARK INST FOR SYSTEMS RESEARCH
|
| Recent advances from the theory of multivariate stochastic orderings can be used to formalize the "folk theorem" to the effect that positive correlations lead to larger buffer levels at a discrete-time infinite capacity multiplexer queue. For instance, it is known that if the input traffic is larger than its independent version in the supermodular (sm) ordering, then their corresponding buffer contents are similarly ordered in the increasing convex (icx) ordering. ... |
|
| A New Hybrid Channel Access Scheme for Ad Hoc Networks |
2002 |
6 pages |
| Authors:
Yu Wang; J. J. Garcia-Luna-Aceves; CALIFORNIA UNIV SANTA CRUZ DEPT OF COMPUTER ENGINEERING
|
| Many contention-based channel access schemes have been proposed for multi-hop ad hoc networks in the recent past, and they can be divided into two categories, sender-initiated and receiver-initiated, according to the collision avoidance handshake in use. The sender-initiated scheme is adopted in the IEEE 802.11 Medium Access Control (MAC) protocol, which is by far the most popular and studied protocol. However, the IEEE 802.11 MAC protocol can experience serious fairness ... |
|
| Performance of Collision Avoidance Protocols in Single-Channel Ad Hoc Networks |
2002 |
11 pages |
| Authors:
Yu Wang; J. J. Garcia-Luna-Aceves; CALIFORNIA UNIV SANTA CRUZ DEPT OF COMPUTER ENGINEERING
|
| This paper presents the first analytical model to derive the saturation throughput of collision avoidance protocols in multi-hop ad hoc networks with nodes randomly placed according to a two-dimensional Poisson distribution. The authors show that the sender-initiated collision-avoidance scheme performs much better than the ideal Carrier Sense Multiple Access (CSMA) scheme with a separate channel for acknowledgments. But they also show that the collision-avoidance scheme can accommodate far fewer competing ... |
|
| Spatial Reuse and Collision Avoidance in Ad Hoc Networks with Directional Antennas |
2002 |
6 pages |
| Authors:
Yu Wang; J. J. Garcia-Luna-Aceves; CALIFORNIA UNIV SANTA CRUZ DEPT OF COMPUTER ENGINEERING
|
| The quest for efficient medium access control (MAC) protocols for multi-hop ad hoc networks has aroused great interest in using directional antennas. Some MAC protocols using directional antennas have been proposed in the past, which trade off spatial reuse and collision avoidance via a combination of omni-directional and directional transmission modes. In this paper, the authors argue that the benefit of spatial reuse achieved by a MAC protocol that uses ... |
|
| Collision Avoidance in Multi-Hop Ad Hoc Networks |
2002 |
11 pages |
| Authors:
Yu Wang; J. J. Garcia-Luna-Aceves; CALIFORNIA UNIV SANTA CRUZ DEPT OF COMPUTER ENGINEERING
|
| Collision avoidance is very important in contention-based medium access control protocols for multi-hop ad hoc networks due to the adverse effects of hidden terminals. Four-way sender-initiated schemes are the most popular collision-avoidance schemes to date. Although there has been considerable work on the performance evaluation of these schemes, most analytical work is confined to single-hop ad hoc networks or networks with very few hidden terminals. In this paper, the authors ... |
|
| An Efficient Path Selection Algorithm for On-Demand Link-State Hop-by-Hop Routing |
2002 |
5 pages |
| Authors:
Soumya Roy; J. J. Garcia-Luna-Aceves; CALIFORNIA UNIV SANTA CRUZ DEPT OF COMPUTER ENGINEERING
|
| Traditional routing protocols based on link-state information form a network topology through the exchange of link-state information by flooding or by reporting partial topology information, and by computing shortest routes to each reachable destination using a path-selection algorithm like Dijkstra's algorithm or the Bellman-Ford algorithm. However, in an on-demand, link-state routing protocol, no one node needs to know the paths to every other node in the network. Accordingly, when a ... |
|
| InGaAs Multiple Quantum Well Modulating Retro-reflector for Free Space Optical Communications |
2002 |
13 pages |
| Authors:
W. S. Rabinovich; G. C. Gilbreath; Peter G. Goetz; R. Mahon; D. S. Kazter; K. Ikossi-Anasatasiou; S. Binari; T. J. Meehan; M. Ferraro; I. Sokolsky; J. A. Vasquez; M. J. Vilcheck; NAVAL RESEARCH LAB WASHINGTON DC
|
| Modulating retro-reflectors provide a means for free space optical communication without the need for a laser, telescope or pointer tracker on one end of the link. These systems work by coupling a retro-reflector with an electro-optic shutter. The modulating retro-reflector is then interrogated by a cw laser beam from a conventional optical communications system and returns a modulated signal beam to the interrogator. Over the last few years the Naval ... |
|
| Modulating Retro-Reflectors for Space, Tracking, Acquisition and Ranging using Multiple Quantum Well Technology (Preprint) |
2002 |
15 pages |
| Authors:
G. C. Gilbreath; N. G. Creamer; W. S. Rabinovich; Timothy J. Meehan; Michael J. Vilcheck; John A. Vasquez; Rita Mahon; Eun Oh; Peter G. Goetz; Sharon Mozersky; NAVAL RESEARCH LAB WASHINGTON DC REMOTE SENSING DIV
|
| This paper describes a novel concept for optical interrogation, communication, and navigation between spacecraft platforms. The technique uses a gimbaled laser source on a pursuer spacecraft and an array of solid-state, multiple quantum well modulating retroreflectors on a target spacecraft. The sensor system provides high-bandwidth optical communication, centimeter-level relative positioning, and better than arc-minute-level relative attitude of the target platform with minimal sacrifice in target size, weight, and power. To ... |
|
| Multidisciplinary Optical Switching Technology Center (MOST) |
31 DEC 2001 |
233 pages |
| Authors:
John E. Bowers; CALIFORNIA UNIV SANTA BARBARA DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
| This MURI grant was reviewed within the overall program in July of 1998 by government science and technology managers from DARPA, BMDO, and DDRandE as well as by the AFOSR program manager and found superlative in achieving stated goals and program objectives. Documentation of specific technical progress is retained with the grant funding records in the form of annual technical reports. The MOST center successfully addressed the following aspects of ... |
|
| A Compact Coastal Ocean Observing System for Kernel Blitz 2001 |
DEC 2001 |
|
| Authors:
Jason I. Gobat; Robert A. Weller; Bryan S. Way; Jeffrey Lord; Mark Pritchard; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA
|
| In this report we describe a compact, easily deployed, moored system for oceanographic and meteorological observations in the coastal ocean. The system consists of a surface and subsurface mooring pair deployed adjacent to one another. Compared to a single catenary surface mooring, this arrangement allows the entire water column to be instrumented. All of the instruments in the system log high resolution time series data. Additionally, the mooring line instruments ... |
|
| An Assessment of Emerging Wireless Broadband Technologies |
DEC 2001 |
|
| Authors:
Leonidas Fountanas; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| This thesis provides an objective assessment in emerging wireless broadband technologies that are proposed as a solution to the "last mile" problem Local Multipoint Systems (LMDS), Free Space Optics (FSO) and High Altitude Long Endurance (HALE) systems are examined by comparing alternative technological options and solutions, Additionally, these systems are compared with the wired competitor technologies The main benefits of wireless versus wired technologies are ease and fast deployment, lower ... |
|
| Full L-S Band Telemetry System |
DEC 2001 |
9 pages |
| Authors:
Michael A. Jensen; BRIGHAM YOUNG UNIV PROVO UT DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
| Recent changes in spectrum availability as well as higher demands for spectrum have motivated the development of telemetry transmit systems capable of fully operating over both L and S telemetry bands. However enabling operation within these two bands poses new problems in system design. This report presents a prototype system capable of operating between 1.4 and 2.4 GHz, which supports continuous phase modulation (CPM) waveforms such as pulse code modulation ... |
|
| Telecommunication Networks for Mobile & Distributed Communications/ Computing |
DEC 2001 |
30 pages |
| Authors:
Sumit Roy; TEXAS UNIV AT SAN ANTONIO
|
| This is the final report for the grant F49620-96-1-0472 which ended on Dec. 31, 2000. During the period from September 1996 through December 2000, the main objectives were to: 1. Build a research infrastructure (equipment, faculty, students) 2. Develop faculty research opportunities 3. Develop a graduate student research program within the Computer Science and Electrical Engineering Departments. |
|
| Energy Efficient Network Protocols for Wireless and Mobile Networks |
NOV 2001 |
9 pages |
| Authors:
Krishna M. Sivalingam; WASHINGTON STATE UNIV PULLMAN WA SCHOOL OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCE
|
| This research project studies the design, analysis and implementation of energy efficient (also called power aware) network protocols for wireless and mobile networks. Battery power limitations are a very serious concern, and it is essential to study energy efficient protocol design at different layers of the network protocol stack. In particular, we focus on the medium access control, scheduling, quality-of-service reservation signaling, and transport protocols. We completed the design and ... |
|
| Augmentation of Acute Stroke Management via Telemedicine |
NOV 2001 |
6 pages |
| Authors:
John Y. Choi; WALTER REED ARMY MEDICAL CENTER WASHINGTON DC
|
| What have you accomplished relative to the goals as stated in your proposal: 0 Study nurse coordinator started employment at the end of May 2001 to arrange for administrative completion of study associated data collection methods, coordination of installation of study related technical equipment, selecting and ordering equipment, coordination of communication among participating associated investigators, and for patient recruitment. 0 All necessary forms submitted to the IRB. The IRB approval ... |
|
| Implementation and Evaluation of a Web-Based Automated Mental Health Intake System |
NOV 2001 |
6 pages |
| Authors:
Ryo S. Chun; WALTER REED ARMY MEDICAL CENTER WASHINGTON DC
|
|
| ERMC Remote Teleoptometry Project |
NOV 2001 |
6 pages |
| Authors:
Erik J. Kobylarz; LANDSTUHL REGIONAL ARMY MEDICAL CENTERAPO NEW YORK 09180
|
|
| Using Telemedicine and Wireless Technology to Improve Diabetic Outcomes in Poorly Controlled Patients |
NOV 2001 |
6 pages |
| Authors:
Robert A. Vigersky; WALTER REED ARMY MEDICAL CENTER WASHINGTON DC
|
|
| Two-Way Satellite Time Transfer to a Moving Platform |
Nov 2001 |
17 pages |
| Authors:
Edward Powers; James Romberg; Roger Griffin; Angela McKinley; David Diener; Klotz; Harold A Jr; David Wolters; NAVAL OBSERVATORY WASHINGTON DC
|
| Precision time transfer is a key requirement for many applications. Three methods of time transfer that have typically been used are Stand-alone GPS, GPS Common View, and Two-way Satellite Time Transfer (TWSTT). Only the Stand-alone GPS approach has been regularly been used on a moving platform and this is the least accurate of the three time transfer methods. Analyses show that the standalone method is inadequate to meet the time ... |
|
| Compressed Internet Protocol Data Via Geosynchronous Earth Orbit Satellite Circuits |
30 OCT 2001 |
67 pages |
| Authors:
Stuart W. Card; Eric R. Crossman; Christine M. Haka; Youngki Hwang; Michael W. Joseph; CRITICAL TECHNOLOGIES UTICA NY
|
| To enable Internet Protocol (IP) applications in the submarine environment, Critical Technologies Inc. (CTI) has defined requirements for an integrated system, comprising enhanced Data Link, Network and Transport protocols (OSI Layers 2-4), and an innovative Application Traffic Controller (ATC, operating in OSI Layers 5-7). The system will optimize efficiency and effectiveness of fleet communications, despite submarine SATCOM's high Bit Error Rate, low bandwidth, long latency, extreme channel variability and severely ... |
|
| Short-Range Wireless Audio-Video Link for Accident & Emergency Medicine |
25 OCT 2001 |
|
| Authors:
Edmond Zahedi; Mohd Ali; Khor K. Kuen; NATIONAL UNIV (MALAYSIA) DEPT OF ELECTRONICS AND SYSTEMS ENGINEERING
|
| In this paper, a wireless, simplex communication link covering a range of 100 ft (indoor) and up to 300 ft (outdoor) is presented. This link establishes a one channel color video and mono audio communication with an emergency vehicle such as an ambulance. To ensure a totally hands-free operation, a miniature camera is mounted on a modified safety helmet. The camera is fitted with a microphone. The video transmitter and ... |
|
| Real-Time Cryptography for Vital Signals Transmission |
25 OCT 2001 |
|
| Authors:
Ding S. Kion; Edmond Zahedi; Mohammed Ali; NATIONAL UNIV (MALAYSIA) DEPT OF ELECTRONICS AND SYSTEMS ENGINEERING
|
| In this paper, an approach to design a real-time cryptography system for transferring vital signals is presented. The cryptography requirement is dictated by patient privacy. The system is divided into five main parts, namely symmetric encryption algorithms, key-exchange algorithm, hash function, communication protocol and display. The implemented algorithms are chosen based on parameters such as encryption speed, level of security and complexity. The key-exchange algorithm presented in this paper is ... |
|
Telemetry
