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Aerospace and Electronics Conference, 1994. NAECON 1994., Proceedings of the IEEE 1994 National

Date 23-27 May 1994

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Displaying Results 1 - 25 of 199
  • Proceedings of National Aerospace and Electronics Conference (NAECON'94)

    Publication Year: 1994
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    Freely Available from IEEE
  • Cross-range scaling of inverse synthetic aperture radar

    Publication Year: 1994, Page(s):175 - 180 vol.1
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    This paper investigates the problem of cross-range scaling of inverse synthetic aperture radar. It is very important to target classification and recognition via ISAR. The cross-range scale of ISAR depends on both radar wavelength and rotating angle of target relative to radar-line-of-sight (RLOS) during the total coherent processing time. The former is known while the latter is difficult to deter... View full abstract»

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  • A comparison of unshielded wire to shielded wire with shields terminated using pigtails

    Publication Year: 1994, Page(s):181 - 184 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB)

    Pigtails, the jumper wires used to terminate wire shields, are used extensively in military applications. The work presented in this paper shows that shielded wires with pigtail terminations are as susceptible to external electromagnetic (EM) coupling as unshielded wires when radiated in the 200-1200 MHz frequency range. EM coupling onto wires can lead to electromagnetic interference (EMI) in elec... View full abstract»

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  • Field results demonstrate reliability gains through improved cooling

    Publication Year: 1994, Page(s):185 - 188 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (348 KB)

    The principle that improved cooling enhances the reliability of electronic equipment has long been accepted. Recently, questions have been raised concerning improved cooling and the expected magnitude of reliability gains. A recently completed analyses of operational results, comparing avionic reliability achieved on F-15 aircraft under significantly different cooling conditions, shows cooling-rel... View full abstract»

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  • GEM-contemporary system support solutions

    Publication Year: 1994, Page(s):1158 - 1164 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB)

    The Department of Defense (DoD) and Original Equipment Manufacturers (OEMs) face an increasingly difficult time supporting fielded systems due to a variety of factors. The generalized emulation microcircuit (GEM) program applies modern technology to provide an economical, rapid alternative to traditional redesign approaches. GEM provides form, fit, and function (FFF) replacement devices for unavai... View full abstract»

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  • Signal processing techniques for target detection performance improvements in existing airborne early warning radars

    Publication Year: 1994, Page(s):189 - 196 vol.1
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (428 KB)

    This paper discusses a new signal processing technique for target detection performance improvements in existing airborne early warning radar systems. A new Doppler processing algorithm, called the Doppler domain localized generalized likelihood ratio detector, is considered, and performance compared to the approaches currently in use for weak target detection in severe clutter. It is shown that a... View full abstract»

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  • Application of emerging technologies to improve supportability

    Publication Year: 1994, Page(s):1165 - 1172 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (444 KB)

    Lower supportability cost is a major factor in procuring new aircraft and in affording the aircraft currently in inventory. This is a challenge in both the military and commercial sectors. This paper presents several initiatives at McDonnell Douglas Aerospace (MDA) that address lower supportability costs. These include: quality and optimization techniques to provide a means to value and allocate d... View full abstract»

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  • Efficient resonant frequency-doubling in semiconductor multilayers

    Publication Year: 1994, Page(s):520 - 524 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    We propose efficient frequency doubling in semiconductor multilayers. When the fundamental beam is coupled into the waveguide propagating along the multilayer plane, second-harmonic light emits from the the surface of the multilayer structures, normal to the propagation direction of the fundamental beam. The quasi-phasematching is achieved by growing alternating thin layers in which a single unit ... View full abstract»

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  • Advanced design for quality avionic systems: a new roadmap for systems development

    Publication Year: 1994, Page(s):251 - 258 vol.1
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (572 KB)

    With respect to avionics systems, traditional design and manufacturing processes have proven themselves to be inadequate when it comes to meeting the new realities of the defense market place. Maintaining performance superiority in the face of today's reduced budgets and manpower requires new and disciplined processes, lower costs, shorter development cycles, and products that successfully balance... View full abstract»

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  • Two-bit restricted signed-digit quaternary full adder

    Publication Year: 1994, Page(s):1119 - 1125 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    A multibit quaternary full adder is designed using a restricted set of modified signed-digit quaternary number system; Such adders could be stacked in parallel and they can add two n-bit numbers in a constant time irrespective of the operand size. An optical nonholographic content addressable memory is proposed for implementing the adder View full abstract»

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  • In-flight line-of-sight sensor boresighting using GPS receiver data

    Publication Year: 1994, Page(s):197 - 203 vol.1
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (412 KB)

    A technique is presented to boresight a two-axis line-of-sensor, in-flight, using outputs from an inertially aided GPS receiver. This technique implements scalar Kalman filters in the sensor's line-of-sight frame to estimate errors between a computed sensor line-of-sight and readouts available from the sensor while tracking a surveyed ground reference point. Compensations for INU attitude and posi... View full abstract»

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  • Space satellites from the world's garage-the story of AMSAT

    Publication Year: 1994, Page(s):1174 - 1181 vol.2
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (644 KB)

    AMSAT is a worldwide group of Amateur Radio Operators (Hams) who share an active interest in building, launching and then communicating with each other through non-commercial Amateur Radio satellites. By any measure, AMSAT's track record has been impressive. Since its founding 25 years ago, AMSAT has used predominantly volunteer labor and donated resources to design, construct, and, with the added... View full abstract»

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  • Real-time parameter identification for self-designing flight control

    Publication Year: 1994, Page(s):526 - 531 vol.1
    Cited by:  Papers (5)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    A self-designing flight control system (SDFCS) could provide a cost-effective means for developing controllers for new aircraft by eliminating analyst-intensive design of numerous individual controllers, each optimized for a single flight condition. Additionally, the SDFCS could improve the capabilities of existing aircraft by enhancing control performance in new flight regimes such as high angle-... View full abstract»

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  • Three dimensional object recognition using a complex autoregressive model

    Publication Year: 1994, Page(s):259 - 266 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (540 KB)

    Complex Partial Correlation (CPARCOR) features, derived from an autoregressive model, are known to provide exceptional position, scale, and rotation invariant (PSRI) properties for planar two dimensional (2-D) object recognition. Although autoregressive models have been successfully applied to numerous spatio-temporal recognition tasks, the effects of out-of-plane image rotations and known levels ... View full abstract»

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  • The location method and accuracy analysis for bistatic systems

    Publication Year: 1994, Page(s):62 - 65 vol.1
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (160 KB)

    The bistatic system discussed in this paper consists of one transmitter and one receiver at different sites, in which the transmitter only emits radar signal, and the receiver measures range sum, azimuth and elevation angles. In this paper, the location method and position errors of targets are analysed. By analyzing the region distribution of target position accuracy (GDOP) in the controlled airs... View full abstract»

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  • Simultaneous operation of UHF communication channels on an airborne platform

    Publication Year: 1994, Page(s):1127 - 1134 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (756 KB)

    Ultra high frequency (UHF) channels provide a reliable medium for conveying voice and data information between users within a communications network. UHF communication channels may be categorized as either Line-of-Sight (LOS) or Satellite Communication (SATCOM) channels. UHF LOS and SATCOM systems are typically composed of voice/data sources, cryptographic devices (for secure channels), data termi... View full abstract»

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  • High-resolution estimation and on-line monitoring of natural frequency of aircraft structure specimen under random vibration

    Publication Year: 1994, Page(s):468 - 474 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    The growth of structural damage reduces the stiffness which results in decrease in the natural frequency of a specimen (coupon) under random vibration. However, the identification of the natural frequency is not a trivial problem because the coupons are shaken in a random fashion in which many closely-spaced frequencies are involved. The signal may have other redundant frequencies involved which a... View full abstract»

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  • Third generation airport surface detection equipment design

    Publication Year: 1994, Page(s):1301 - 1308 vol.2
    Cited by:  Papers (4)  |  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (584 KB)

    The Federal Aviation Administration under the National Airspace System Plan is modernizing its airport radar for surface surveillance. Part of this modernization program includes the installation of the third generation of Airport Surface Detection Equipment known as ASDE-3. This major advancement over existing equipment uses modern radar technology to provide ground controllers with a crisp, clut... View full abstract»

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  • Neural solution to multitarget tracking in clutter with velocity measurements

    Publication Year: 1994, Page(s):204 - 211 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (516 KB)

    The problem of tracking multitarget in clutter environment in a track while scan (TWS) system is considered. In such an environment, missed detections and false alarms make it impossible to decide, with certainty, the origin of received report. The two main functions of the TWS algorithm are : 1) plot-to-track (state predicted estimate) association, and 2) the filtering algorithm that uses the ass... View full abstract»

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  • A CF-based algorithm for moving dot target detection in FLIR image sequence

    Publication Year: 1994, Page(s):354 - 357 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (192 KB)

    Dot target detection in FLIR image sequences with very low SNR has been used in guidance and surveillance systems and many algorithms have been developed to solve this problem. In this paper, a certain factor (CF) based algorithm was proposed, It is composed of two components: a predetector and a trace matcher. The predetector implements a N- P test on each pixel in the images. The trace matcher m... View full abstract»

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  • Reducing software life-cycle costs by developing configurable software

    Publication Year: 1994, Page(s):1182 - 1187 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (356 KB)

    This paper describes a novel method for reducing the costs associated with developing and maintaining software in a well defined avionics system domain. Specifically we have developed configurable flight data recorder software and a set of windows based configuration tools that permit a user to define the application layer of the avionics system software without having to have a knowledge of progr... View full abstract»

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  • Application of neural control to active structural load alleviation

    Publication Year: 1994, Page(s):532 - 539 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (652 KB)

    Modern large transport aircrafts are subject to considerable structural flexibility during flight. In order to improve the dynamic response of such aircraft the use of active control technology is proposed which will alleviate the structural loads to which the airframe is subjected as a result of manoeuvre demands or encountering atmospheric turbulence. A number of methods, including linear optima... View full abstract»

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  • Ultra-reliable digital avionics (URDA) processor architecture

    Publication Year: 1994, Page(s):274 - 280 vol.1
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (552 KB)

    The objective of the URDA program is to develop a prototype advanced development model (ADM) processor that combines a data processor, signal processor, memory and system interface on a single SEM-E avionics card. TI's approach integrates two Ada-programmable, URDA basic processor modules (BPMs) with a JIAWG-compatible PiBus and TMBus onto a common SEM-E format ADM module and provides a separate, ... View full abstract»

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  • Feature extraction for radar ship target recognition using compactly supported wavelets

    Publication Year: 1994, Page(s):66 - 73 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    In this paper, we are mainly concerned with the application of orthogonal discrete wavelet transform in feature extraction for incoherent radar ship target recognition, based on the Daubechies' wavelets (1988). Experiments are carried out for the proposed method with practical video-echo data of four kinds ,and the corresponding results indicate that the computational complexity of the new method ... View full abstract»

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  • Replacement of the yellow dixie cup

    Publication Year: 1994, Page(s):1135 - 1137 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (252 KB)

    The upgrade and improvement of life support systems has always been a priority for the United States Air Force. A study is currently underway to determine the feasibility of replacing the emergency passenger protective breathing device used on USAF transport aircraft. The present system, the “yellow dixie cup”, provides supplemental oxygen in the event of a rapid decompression. The sys... View full abstract»

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