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Aerospace and Electronic Systems, IEEE Transactions on

Issue 2 • Date March 1987

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Displaying Results 1 - 25 of 26
  • Table of contents

    Publication Year: 1987 , Page(s): c1
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  • IEEE Aerospace and Electronic Systems Society

    Publication Year: 1987
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  • From the Editors

    Publication Year: 1987 , Page(s): 145
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  • Flyback Converter Output Voltage Stabilization

    Publication Year: 1987 , Page(s): 146 - 151
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1375 KB)  

    The expression of the flyback converter output voltage (output power) is derived as a function of the supply voltage, load resistance, transformer ratios, transistor current gain, and base-circuit resistor value. Switching period and duty cycle are also calculated. A converter circuit is designed having stabilized output voltage, with respect to supply voltage, at constant load. The transistor bas... View full abstract»

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  • Effects of Reduced SAR Azimuth Processing

    Publication Year: 1987 , Page(s): 152 - 157
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2673 KB)  

    Several approaches are evaluated for reducing the large data handling and processing loads associated with synthetic aperture radar (SAR) imaging systems. The effects of data abbreviation on SAR images were studied theoretically as well as experimentally with SEASAT-A data. Image degradation was measured in terms of azimuth resolution and signal-to-clutter ratio. It was found that the degradation ... View full abstract»

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  • The Open-Loop Transfer Matrix of an Estimator-Controller

    Publication Year: 1987 , Page(s): 158 - 168
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    Open-loop transfer matrices of continuous and sampled-data estimator-controllers (including those in predictor-corrector form) are derived. This paper complements an earlier paper in which open-and closed-loop transfer matrices of estimators and closed-loop transfer matrices of estimator-controllers were derived. Three different open-loop transfer matrices of each type of estimator-controller are ... View full abstract»

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  • Real-Time Wind Estimation and Tracking with Transponder Downlinked Airspeed and Heading Data

    Publication Year: 1987 , Page(s): 169 - 174
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1612 KB)  

    The use of magnetic heading and true air speed measurements made on board civil airplanes to assist in radar tracking is described. The data are telemetered via the air-ground data link of the mode S radar system. A new filter, similar to the first-order Kalman filter, is developed using velocity measurements to bias its prediction equations. This filter follows satisfactorily maneuvers, and estim... View full abstract»

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  • Basic Concepts in the Processing of SARSAT Signals

    Publication Year: 1987 , Page(s): 175 - 198
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (3634 KB)  

    Search and rescue satellite-aided tracking (SARSAT) involves the use of satellites in low-polar orbits which relay the emergency signals of distressed vehicles to an earth station for signal analysis. In this paper, we present some basic concepts and a theoretical analysis of the spectra produced by coherent and noncoherent emergency locator transmitter signals. It is shown that coherent signals c... View full abstract»

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  • Identification Techniques for SARSAT Signals

    Publication Year: 1987 , Page(s): 199 - 214
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2899 KB)  

    A process for the identification of emergency locator transmitter (ELT) signals related to search and rescue satellite-aided tracking (SARSAT) is presented. The ELT identification process is particularly important in order to increase the probability of detection and eliminate sources of interference from the data set. A set of ELT signal parameters is introduced and methods for estimating these p... View full abstract»

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  • Paral lel VLSI Implementation of the Kalrman Filter

    Publication Year: 1987 , Page(s): 215 - 224
    Cited by:  Papers (12)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (3077 KB)  

    The problem of parallel implementation of the square-root Kalman filters is addressed. At the system level, our approach is to apply systolic-type VLSI processor arrays as basic building blocks to accelerate the matrix operations required in each iteration. To maximize the parallelism, we also exploit an inter-array pipelining scheme through the overlapping of execution between successive processo... View full abstract»

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  • A Direct Solution to GPS-Type Navigation Equations

    Publication Year: 1987 , Page(s): 225 - 232
    Cited by:  Papers (25)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1487 KB)  

    One solution to the navigation equations involves iteration on the 4 by 4 augmented range-direction-cosine matrix beginning with an assumed position and so assumed direction cosines, of which there are 12 for 4 satellites. An algebraic, direct solution to this same basic equation set has recently been published. Both of these methods are reviewed. We offer a direct solution using modified function... View full abstract»

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  • A Nominator-Selector Two-Stage Signal Detection Scheme

    Publication Year: 1987 , Page(s): 233 - 239
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1633 KB)  

    A two-stage approach to computationally efficient signal detection is to nominate candidate signal vectors using a suboptimal, but computationally cheap, detection scheme, and subsequently perform optimal detection on the candidates. Bounds on the detection performance of this approach are presented along with sufficient conditions for optimality. Examples are presented of an optimal and nearly op... View full abstract»

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  • Frequency-Domain Analysis of Switching Closed-Loop Regulators

    Publication Year: 1987 , Page(s): 240 - 246
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1267 KB)  

    An accurate analysis of a switching voltage regulator power stage is performed by eliminating the mathematical unrigorousness of the averaging technique. The differential equations are solved for the ON and OFF intervals to obtain the exact mean values in function of the values at the beginning and at the end of the intervals. The accurate relation is used for the integral of the derivative formin... View full abstract»

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  • Geostationary Satellite Navigation Systems

    Publication Year: 1987 , Page(s): 247 - 254
    Cited by:  Papers (13)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1584 KB)  

    The concept of position determination using geostationary satellites as an alternative to the global positioning system (GPS) is studied. The advantage of a geostationary system is that only three, or at most four, satellites are required to cover the continental United States. A total of twelve satellites are sufficient for global coverage (excluding polar regions), or eight if only longitude and... View full abstract»

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  • A Methodology for Computing Link Availability

    Publication Year: 1987 , Page(s): 255 - 262
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1952 KB)  

    An efficient and systematic numerical technique is presented for predicting availability of an RF link between a ground station and a communication satellite. This new methodology takes into account the effects of weather and time-varying link geometry caused by satellite motion as well as the customary ground/satellite link parameters. The availability computed under the worst link geometry (5 de... View full abstract»

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  • Asymptotically Optimum Sample Size for Quickest Detection

    Publication Year: 1987 , Page(s): 263 - 272
    Cited by:  Papers (12)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1978 KB)  

    A method is presented for selecting the asymptotically optimum sample size M for detecting a sudden change in the statistics of an observed process. The test statistic is assumed to be a sum of M consecutive values of some single sample detector and the optimization criterion is to minimize the mean time to detection MD for a given mean time between false alarms MF. It is shown that for large MF a... View full abstract»

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  • Radar Target Pointing Error Reduction Using Extended Kalman Filtering

    Publication Year: 1987 , Page(s): 273 - 279
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1358 KB)  

    A new method of reducing target glint errors in radar systems is presented. The target is modeled as n reflectors whose magnitudes and phases are known. The reflector positions are described by a dynamical model driven by white Gaussian noise. The resulting vibrations of the target reflectors produce glintlike pointing errors in the radar system. An extended Kalman filter is developed to estimate ... View full abstract»

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  • Information for authors

    Publication Year: 1987 , Page(s): 280
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  • Systematic Approach for Classification of Modern Surveillance Radar Systems

    Publication Year: 1987 , Page(s): 281 - 285
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    Inherent search volume is proposed as a tool for systematic comparison of modern phased-array surveillance radar systems. The advantage of the inherent search volume over the existing approaches based on single-scan and cumulative probability of detection is that the inherent search volume depends only on the unadjustable parameters of the radar. A comparison algorithm based on the inherent search... View full abstract»

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  • Evaluation of Image Response Signal Power Resulting from I-Q Channel Imbalance

    Publication Year: 1987 , Page(s): 285 - 287
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (401 KB)  

    A simple relationship is obtained that gives the ratio of the image to the desired signal in terms of the amplitude and phase imbalance between the I and Q channels in a quadrature transmission and signal reconstruction processor. View full abstract»

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  • Group-Complementary Temporal Sidelobe Cancellation in Systems with Window-Weighting

    Publication Year: 1987 , Page(s): 287 - 293
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (630 KB)  

    Group-complementary coded pulses have the algebraic property of temporal sidelobe cancellation, when a set of equally weighted pulses are added. When the summation is extended to multiple repetitions of the code set, then the temporal sidelobe cancellation property holds for certain nonuniform pulse weights. View full abstract»

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  • Emendations to "Robust Preprocessing for Kalman Filtering of Glint Noise"

    Publication Year: 1987 , Page(s): 294
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  • Emendations to "Identical Steady-State Results for a Kalman Tracker"

    Publication Year: 1987 , Page(s): 294
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  • IEEE copyright form

    Publication Year: 1987 , Page(s): 295 - 296
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    Freely Available from IEEE
  • IEEE Aerospace and Electronic Systems Society Organization

    Publication Year: 1987 , Page(s): 296-a
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Aims & Scope

IEEE Transactions on Aerospace and Electronic Systems focuses on the organization, design, development, integration, and operation of complex systems for space, air, ocean, or ground environment.  These systems include, but are not limited to, navigation, avionics, spacecraft, aerospace power, radar, sonar, telemetry, defense, transportation, automated testing, and command and control. 

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Lance Kaplan
Army Research Laboratory