By Topic

[Proceedings] NTC-92: National Telesystems Conference

19-20 May 1992

Filter Results

Displaying Results 1 - 25 of 59
  • NTC-92. National Telesystems Conference (Cat. No.92CH3120-3)

    Publication Year: 1992
    Request permission for commercial reuse | PDF file iconPDF (190 KB)
    Freely Available from IEEE
  • Teleoperation of the Spyglass UAV

    Publication Year: 1992
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (103 KB)

    Summary form only given. A vertical takeoff and landing (VTOL) unmanned aerial vehicle (UAV) called Spyglass is discussed. The mechanisms and method of control of the UAV are described, from remote or autonomous operation through final rotor blade adjustments to achieve the desired vehicle attitude and position. The Spyglass UAV missions require autonomous operations and an adaptive electronics pa... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • CLASS interference analysis system

    Publication Year: 1992, Page(s):12/1 - 12/7
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (484 KB)

    The Communications Link Analysis and Simulation System (CLASS) project team of the NASA Goddard Space Flight Center Network Division, Code 530, has developed the CLASS interference analysis system (IAS) to support satellite communications scheduling by NASA's Network Control Center, IAS is designed to analyze communications problems arising from two or more spacecraft communicating with the same t... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Intersatellite communications optoelectronics research at the Goddard Space Flight Center

    Publication Year: 1992, Page(s):14/9 - 1412
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (292 KB)

    Current optoelectronics research and development of high power, high bandwidth laser transmitters, high bandwidth, high sensitivity optical receivers, pointing acquisition and tracking components, and experimental and theoretical system modeling at the NASA Goddard Space Flight Center is reviewed. Program hardware and space flight opportunities are presented View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • SCADA application for ACTS technology

    Publication Year: 1992, Page(s):8/15 - 8/21
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (512 KB)

    A satellite and earth terminal systems study was initiated by the NASA Advanced Communication Technology Satellite (ACTS) Project Office and was performed by Hughes Network Systems. The purpose of the study was to investigate the potential of a specialized Ka-band spot beam satellite to reduce the cost of supervisory control and data acquisition (SCADA) communications. The study showed th... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Design considerations of a submarine laser communications system

    Publication Year: 1992, Page(s):14/13 - 14/25
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (748 KB)

    It is pointed out that the US Navy appears to be ready to initiate the development of an optical communication system between satellites and submarines. This system will operate in the blue/green region of the spectrum. A great deal of the pat work has been to develop the critical components that will allow operations through clouds and water to submarines at depth, and to determine some of the ke... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Telerobotic testing of autonomous air vehicles

    Publication Year: 1992, Page(s):10/23 - 10/26
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    It is noted that the testing of fully autonomous air vehicles usually begins under the control of an expert teleoperator. Design and testing progress by transferring control from the expert to the onboard intelligence which will ultimately provide self-governing control for the air vehicle. The transfer process is best performed when ever-increasing authority is granted to the onboard intelligence... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Low-cost TDRSS communications for NASA's Long Duration Balloon Project

    Publication Year: 1992, Page(s):8/23 - 8/27
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (372 KB)

    A new low-cost non-space-qualified TDRSS user S-band transponder and RF ground support equipment have brought tracking and data relay satellite system (TDRSS) capabilities to a class of users who seek enhanced operations for low budget scientific investigations. The Goddard Space Flight Center (GSFC)/Wallops Flight Facility's Long Duration Balloon Project (LDBP) will take advantage of the... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A comparative study of clutter rejection techniques in airborne radar

    Publication Year: 1992, Page(s):1/1 - 1/6
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    The authors present radar detection, performance analysis results for targets in highly nonhomogeneous clutter environments where conventional adaptive array processing techniques are not feasible. For this case, the performance of an adaptive array processing technique which uses an angle-Doppler domain localized generalized likelihood ratio test is compared to that of a conventional displaced ph... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The Autonomous Data Optical Relay Experiment: first two way laser communication between an aircraft and submarine

    Publication Year: 1992, Page(s):14/27 - 14/30
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB)

    The Autonomous Data Optical Relay Experiment (ADORE) was held at the Sea Test Range of the Pacific Missile Test Center off the coast of Southern California near San Nicolas Island during May 22-24 and May 28, 1991. The optical communication system operated with a green downlink based on a diode-pumped frequency-doubled Nd:YAG transmitter communicating with a quartz birefringent filter receiver and... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • GE high density interconnect: a solution to the system interconnect problem

    Publication Year: 1992, Page(s):11/1 - 11/4
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (404 KB)

    It is noted that the General Electric high density interconnect (GE-HDI) is an excellent solution to the digital multichip packaging problem, and it offers solutions to other difficult system interconnect problems in analog power, microwave, display, and sensors. GE-HDI offers the closest hybrid solution to wafer scale integration, achieving the benefits of performance and density without the limi... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The Three-Dimensional Event-Driven Graphics Environment (3D-EDGE)

    Publication Year: 1992, Page(s):6/1 - 6/5
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    Stanford Telecommunications has developed the Three-Dimensional Event-Driven Graphics Environment (3D-EDGE) for the NASA Goddard Space Flight Center's Communications Link Analysis and Simulation System (CLASS). 3D-EDGE consists of a library of object-oriented subroutines, which allows engineers with little or no computer graphics experience to programmatically manipulate, render, animate and acces... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Human-computer interface for the 21st century

    Publication Year: 1992, Page(s):6/21 - 6/23
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (264 KB)

    An overview of current interfaces is presented, with attention given to icons, menus, hypermedia and hyperobjects, video, audio, virtual reality and animation. A prediction of the interfaces at the end of the next decade is also presented. It is predicted that the next decade will see a continuance of the universal user interface but with computers that have the capability of adapting to the human... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • KRYPTON: a low cost satellite communication concept

    Publication Year: 1992, Page(s):8/29 - 8/36
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    Coverage results are shown for an inclined, elliptic low-altitude 36-satellite system (KRYPTON). This concept would be competitive with other low-altitude satellite concepts in the high-density North Atlantic and North Pacific communication routes, but at lower cost. It may be expanded to a 72-satellite system which offers excellent coverage in the Northern Hemisphere, and competitive coverage fro... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Improved radar detection using adaptive multiband polarization processing

    Publication Year: 1992, Page(s):1/7 - 111
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (436 KB)

    Two results concerning clutter estimation are presented. First, the use of frequency diversity improves adaptive detection performance to a greater extent than has been reported for optimum processors under an equal transmit energy constraint. Second, the MPGLR (multiband polarization generalized likelihood ratio) algorithm improves detection performance in the polarization domain and, in contrast... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The application of acoustic charge transport technologies to wideband communication systems

    Publication Year: 1992, Page(s):15/1 - 1512
    Cited by:  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (904 KB)

    The strengths and weaknesses of ACT (acoustic charge transport) devices for communication-related signal processing applications are discussed. The main strength of ACT devices is in PTFs (programmable transversal filters), where they offer a high degree of flexibility in very small physical volumes and with lower power dissipation in comparison with competing technologies. The main limitation of ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Advanced silicon-on-silicon VLSI multichip packaging

    Publication Year: 1992, Page(s):11/5 - 11/6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (124 KB)

    A multichip module (MCM) packaging technology was developed for commercial and military applications based on the VLSI chips on silicon (VCOS) technology. This VCOS technology is extremely well suited for low-power, high-density CMOS applications where low cost and fast design cycles are critical. With the use of IBM's controlled collapse chip connection (C4), this technology can basically brick-w... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Video compression implemented using rigid and non-rigid object recognition and computer graphics animation

    Publication Year: 1992, Page(s):6/7 - 614
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (564 KB)

    A video compression prototype system is described that significantly reduces the required bandwidth for video transmission by using intelligent terminals. The terminals used for video compression are trained to recognize what they see. Each computer contains a three-dimensional description of objects that might be in the scene. This description includes information about the objects, such as how t... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Detection of partially correlated signals in clutter using a multichannel model-based approach

    Publication Year: 1992, Page(s):7/1 - 7/8
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (740 KB)

    The author considers the Gaussian multichannel binary detection problem in which the signal and nonwhite clutter noise are Gaussian vector processes with unknown statistics. A generalized likelihood ratio using multichannel innovation processes is implemented via a model-based approach where the signal and clutter are assumed to be characterized by autoregressive vector processes with arbitrary te... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Optical interconnections for digital systems

    Publication Year: 1992, Page(s):9/1 - 9/6
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (424 KB)

    The replacement of electrical lines and connectors by free-space or guided-wave optics in high-performance digital systems is currently of active research interest. As clock rates approach or exceed 1 GHz, as the wiring density required by integrated circuits exceeds the capability of wire bonders, or as size, weight, and immunity to electromagnetic interference become issues, optical interconnect... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The Composite Analytic and Simulation Package for RFI (CASPR) on a coded channel

    Publication Year: 1992, Page(s):13/1 - 13/5
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    The Composite Analytic and Simulation Package for RFI (CASPR) is an analysis package that determines the performance of a coded signal in the presence of radio frequency interference (RFI) and additive white Gaussian noise. It can analyze a system with convolutional coding, Reed-Solomon coding, or a concatenation of the two. The signals can be either interleaved or noninterleaved. The model measur... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Two-dimensional SAR imaging using linear arrays with transverse motion

    Publication Year: 1992, Page(s):7/17 - 7/20
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB)

    The authors present a novel two-dimensional SAR (synthetic aperture radar) imaging technique using DFT (discrete Fourier transform) processing of linear arrays with transverse motion operating in the sequential mode (DFTSQM). High resolution images are generated without the need of range gating. Multiple target detection is performed on the basis of angular (azimuth and elevation) coordinates. No ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The effect of target height on SAR performance, side-looking and forward-looking modes

    Publication Year: 1992, Page(s):1/13 - 1/16
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (256 KB)

    Range relative Doppler processing (RRDP) is implemented to simulate the effect of target height on SAR (synthetic aperture radar) performance, for both side-looking and forward-looking modes. For this purpose, a four-dimensional third-order Taylor series expansion about incremental time, azimuth and elevation angles, and target height is performed. Examples through computer simulation show that ta... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Technical issues with multichip module packaging

    Publication Year: 1992, Page(s):9/17 - 9/24
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (740 KB)

    It is asserted that multichip modules (MCMs) provide a solution to the requirement for cost-effective high-performance packaging in the 1990s, and insight into the selection of an optimum interconnect technology is provided. The different types of interconnect substrates for MCMs are discussed, and it is argued that cofired ceramic and thin-film interconnect substrates are the most suitable ones f... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Inmarsat integrity channels for global navigation satellite systems

    Publication Year: 1992, Page(s):3/5 - 3/8
    Cited by:  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB)

    It is pointed out that the transmission of integrity information using a signal format compatible with GPS (Global Positioning System) and relayed through a geostationary satellite repeater will be critical in achieving high integrity and availability of global navigation by satellite, along with self-contained consistency checking techniques such as receiver autonomous integrity monitoring. The n... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.