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IEEE Transactions on Aerospace and Electronic Systems

Issue 6 • Date Nov. 1984

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Displaying Results 1 - 25 of 39
  • Table of contents

    Publication Year: 1984, Page(s): c1
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  • IEEE Aerospace and Electronic Systems Society

    Publication Year: 1984, Page(s): c2
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  • From the Editors

    Publication Year: 1984, Page(s): 665
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  • Space Station Power System

    Publication Year: 1984, Page(s):666 - 671
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1459 KB)

    A Space Station Task Force was established by NASA in May 1982 to provide focus and direction for space station planning activities. The Task Force also provides Congress and the Administration with sufficient information to allow them to make an informed decision on whether the United States should proceed with a space station as the next major national initiative in space. This paper presents th... View full abstract»

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  • Using Roll-Angle Measurements to Track Aicraft Maneuvers

    Publication Year: 1984, Page(s):672 - 681
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1574 KB)

    Present day radar trackers used for air traffic control purposes perform satisfactorily during straight-line flight, but their performance during maneuvers is sometimes degraded. The introduction of the secondary surveillance radar mode S system makes transmission of several airborne measurements to the ground station possible. This paper investigates the use of one such parameter, roll angle, to ... View full abstract»

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  • Statistical Analysis of Digital Phase-Locked Loops Fading Channiels

    Publication Year: 1984, Page(s):682 - 694
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2008 KB)

    Statistical analyses of zero-crossing sampling first- and second order digital phase-locked loops in fading channls (DPLFC) are presented. A DPLFC is defined as one where the incoming signal is not only corrupted by additive Gaussian noise channel (AGN) but also by a fading communication channel. The three fading channels considered are the log-normal, Rayleigh, and Rician channels. The performanc... View full abstract»

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  • Geometric Approach in Solving Inverse Kinematics of PUMA Robots

    Publication Year: 1984, Page(s):695 - 706
    Cited by:  Papers (43)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1787 KB)

    A geometric approach for deriving a consistent joint solution of a six-point PUMA1 robot is presented. The approach calls for the definition of various possible arm configurations based on the link coordinate systems and human arm geometry. These arm configurations are then expressed in an exact mathematical way to allow the construction of arm configuration indicators and their corresponding deci... View full abstract»

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  • Performance Compparison of Optimum and Conventional MTI and Doppler Processors

    Publication Year: 1984, Page(s):707 - 715
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1768 KB)

    The performance of an optimum radar signal processor and more conventional techniques (such as MTI, adaptive MTI, and cqherent integration) are compared. A mathematical method is suggested and applied to several cases of practical interest. A number of operative conditions are discovered in which the conventional processing techniques give very poor performance and the optimum radar processor beco... View full abstract»

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  • Algorithms for Fast Image Registration

    Publication Year: 1984, Page(s):716 - 728
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4452 KB)

    The automatic determination of local similarity between two images (image registration) is one of the most fundamental problems of image processing and pattern recognition. A class of registration algorithms that are reasonably efficient and robust for translational displacement has been considered to determine relative shift between reference and search images. Stochastic image models defined on ... View full abstract»

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  • A Parametric Technique for Time Delay Estimation

    Publication Year: 1984, Page(s):729 - 735
    Cited by:  Papers (4)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1425 KB)

    The problem of estimating the time difference of arrival of a signal with unknown spectrum to two receivers is treated. A signal model containing both spectral and delay parameters is derived. The model parameters are computed by a two-step procedure: (1) the modified Yule-Walker equations are used to estimate the autoregressive spectrum of the source signal, and (2) a frequency domain squared err... View full abstract»

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  • Missile Guidance Based on Kalman Filter Estimation of Target Maneuver

    Publication Year: 1984, Page(s):736 - 741
    Cited by:  Papers (7)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (907 KB)

    A fourth-order extended Kalman filter is developed to estimate target maneuvers, and a guidance law using these estimates is implemented. View full abstract»

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  • Estimation of Time of Arrival for Rectangular Pulses

    Publication Year: 1984, Page(s):742 - 747
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (978 KB)

    We consider the performance of the maximum likelihood estimator (MLE) for the time of arrival of a rectangular pulse in additive white Gaussian noise. Upper and lower bounds are derived for the mean square error. These bounds are tight for both medium and large energy-to-noise ratios. View full abstract»

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  • Phase and Frequency Transfer Analysis of N Mutually Synchronized Oscillators

    Publication Year: 1984, Page(s):748 - 753
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1337 KB)

    A mathematical model and a theory for the phase and frequency transfer between N mutually synchronized oscillators is presented. Mathematical equations are given for evaluating the phase and frequency transfer accuracy achievable. The Fokker-Planck technique is applied and an approximation solution is obtained for the phase difference process between a pair of network oscillators. The case of the ... View full abstract»

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  • Stepped Sinewave Inverter

    Publication Year: 1984, Page(s):754 - 760
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1042 KB)

    A stepped sinewave dc/ac inverter was analyzed for an inductive load with respect to load current and voltage, harmonics, power factor, and efficiency. This special inverter of high efficiency and low harmonic content is constructed by synthesizing the sinusoidal output by discrete voltage sources, such as storage batteries, solar cell, etc., with electronic switching of the sources at specific ti... View full abstract»

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  • Bayesian Design of Decision Rules for Failure Detection

    Publication Year: 1984, Page(s):761 - 774
    Cited by:  Papers (5)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2605 KB)

    The formulation of the decision making process of a failure detection algorithm as a Bayes sequential decision problem provides a simple conceptualization of the decision rule design problem. As the optimal Bayes rule is not computable, a methodology that is based on the Bayesian approach and aimed at a reduced computational requirement is developed for designing suboptimal rules. A numerical algo... View full abstract»

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  • Distributive Demand-Assigned Packet Switching with Trailer Transmissions

    Publication Year: 1984, Page(s):775 - 788
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2168 KB)

    In a packet satellite system using ALOHA type random access techniques, channels and on-board processing may be effectively used to provide significant gains in throughput, delay, and bandwidth efficiency. Motivated by this conjecture, a distributive demand-assigned packet broadcast system through a processing satellite with multiple request channels and user buffers is first presented. This schem... View full abstract»

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  • Range Resolution of Targets

    Publication Year: 1984, Page(s):789 - 797
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1804 KB)

    The problem of resolving targets in range is formulated as a hypothesis-testing problem. A generalized likelihood approach is developed and very good results are obtained, e. g., targets separated by more than a pulsewidth can almost always be resolved, Specifically, simulations showed that when using a sampling rate of 1.5 samples per pulsewidth, two 20 dB nonfluctuating targets can be resolved a... View full abstract»

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  • Bistatic Radar Cross Sections of Horizontally Oriented Chaff

    Publication Year: 1984, Page(s):798 - 809
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2603 KB)

    Bistatic radar cross sections are determined for scattering from a cloud of randomly positioned resonant dipoles (chaff). Dipoles are assumed to be horizontally oriented with axes randomly oriented in the horizontal plane. The cloud is arbitrarily located relative to an illuminating source having an arbitrary (elliptical) polarization. Cloud cross section is found for an arbitrarily located receiv... View full abstract»

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  • Theoretical Bounds on Random Errors in Satellite Doppler Navigation

    Publication Year: 1984, Page(s):810 - 816
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1398 KB)

    Analytic expressions of the random errors in a satellite Doppler navigation system are developed. The errors in the along-track and across-track coordinates are expressed as functions of the geometry (range and angle), pass-length, and signal-to-noise ratio (SNR). Such an analytic result becomes possible due to an explicit solution to a simplified rectilinear model of the satellite pass over a fla... View full abstract»

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  • Dispersion Effects in a Circular Phased Array

    Publication Year: 1984, Page(s):817 - 821
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (655 KB)

    The dispersion effects that are produced when wideband linear frequency modulation (FM) signals are transmitted through a circular phased array are considered for both one-way and two-way transmissions through the array. The distortions resulting at the output of a matched fi'lter which is matched to the undistorted linear FM signal are studied. These distortions are 1) loss in peak pulse amplitud... View full abstract»

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  • A Simple Method for Sampling In-Phase and Quadrature Components

    Publication Year: 1984, Page(s):821 - 824
    Cited by:  Papers (41)  |  Patents (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (517 KB)

    We present a method of developing in-phase and quadrature samples of a band-limited RF waveform. The problem of matching gain and phase response differences between the two components is avoided by a combination of mixing to an IF frequency, sampling and digitizing, and digital filtering. The novelty of the method is in the design of the digital filter, which is realized as a pair of 900 phase spl... View full abstract»

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  • Detection Loss of the Sample Matrix Inversion Technique

    Publication Year: 1984, Page(s):824 - 827
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (624 KB)

    The sample matrix inversion (SMI) technique is used for Doppler and/or array processing. Previous analysis of the technique has been in terms of signal-to-interference plus noise ratio (SINR). For Gaussian statistics, this performance measure gives the same loss values as does a probability of detection analysis for linear-time invariant systems. It is often somewhat less valid for nonlinear or ti... View full abstract»

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  • Recursive Relationships for Body Axis Rotation Rates Using Quaternions

    Publication Year: 1984, Page(s):827 - 829
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (463 KB)

    The purpose of this paper is to develop the recursive relationships for rigid body rotation rates using quaternions, without explicitly defining the direction cosine matrices, thus resulting in a smaller number of arithmetic operations and storage. View full abstract»

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  • Comments on "Concatenated Sequences for Spread Spectrum Systems"

    Publication Year: 1984, Page(s): 829
    Cited by:  Papers (1)
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  • Weak Signal Detection in Non-Gaussian Noise of Unknown Level

    Publication Year: 1984, Page(s):830 - 834
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (887 KB)

    An adaptive threshold detector to test for the presence of a weak signal in additive non-Gaussian noise of unknown level is discussed. The detector consists of a locally optimum detector, a noise level estimator, and a decision device. The detection threshold is made adaptive according to the information provided by the noise level estimator in order to keep a fixed false-alarm probability. Asympt... View full abstract»

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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