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IEEE Transactions on Aerospace and Electronic Systems

Issue 4 • Date July 1987

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Displaying Results 1 - 25 of 33
  • Table of contents

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

    Publication Year: 1987, Page(s): c2
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  • From the Editor-in-Chief

    Publication Year: 1987, Page(s): 417
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  • Direct Evaluation of Radar Detection Probabilities

    Publication Year: 1987, Page(s):418 - 424
    Cited by:  Papers (38)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1609 KB)

    A simple and effective procedure for evaluating detectionperformances in radar and sonar detection problems is derived forboth fixed-threshold and adaptive-threshold detection. Using theprocedure, the cumulative probabilities of the test statistic can bedirectly evaluated from the moment generating functions bycalculating residues. The exact formulae for computing the detectionperformances for the... View full abstract»

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  • High Dynamic GPS Receiver Using Maximum Likelihood Estimationand Frequency Tracking

    Publication Year: 1987, Page(s):425 - 437
    Cited by:  Papers (51)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2921 KB)

    A new high dynamic global positioning system (GPS) receiver ispresented and its performance characterized by analysis,simulation, and demonstration. The demonstration receiver is abreadboard model capable of tracking a single simulated satellitesignal in pseudorange and range rate. Pseudorange and range rateestimates are made once every 20 ms, using a maximum likelihoodestimator, and are tracked b... View full abstract»

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  • Association of DF Bearing Measurements with Radar Tracks

    Publication Year: 1987, Page(s):438 - 447
    Cited by:  Papers (16)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2103 KB)

    The problem of associating direction finding (DF) bearingmeasurements with radar tracks is formulated as a multiplehypothesis testing problem. A simple decision rule for associating aset of DF bearing measurements with no radar track or one of mpossible radar tracks was developed using a combination of Bayesian and Neyman-Pearson approaches. The decision algorithmwas checked using both computer si... View full abstract»

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  • Frequency Compensation in an Adaptive Antenna System for Frequency-Hopping Communications

    Publication Year: 1987, Page(s):448 - 467
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2924 KB)

    For the full exploitation of an adaptive antenna system forwideband frequency-hopping communications, some form offrequency compensation is necessary. Parameter-dependent,spectral, and anticipative processing are the three methods offrequency compensation that are examined; their strengths,limitations, and variations are discussed. The underlying adaptivealgorithm is the Maximin algorithm, which h... View full abstract»

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  • Design of SIMO Excitation Controllers for Synchronous Generators

    Publication Year: 1987, Page(s):468 - 472
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1090 KB)

    Stabilization of synchronous generator oscillations is investigatedby using a single-input multiple-output (SIMO) excitation controller.The feedback signals which are most effective for the damping ofelectromechanical oscillations are selected based on the participationfactors of various signals. In order to improve the dampings ofpoorly damped oscillation modes, the eigenvalues associated withthe... View full abstract»

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  • Analysis of the Integrity of the Microwave Landing System (MLS) Data Eu nctions

    Publication Year: 1987, Page(s):473 - 484
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2664 KB)

    The microwave landing system (MLS) transmits angle, data, andrange information for use by airborne receivers. In this paper, theintegrity of the data functions is analyzed in terms of the probabilityof undetected errors remaining in the data. The data format andintegrity requirements were derived from the MLS standards andguidance material defined by the International Civil Aviation Organization (... View full abstract»

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  • The Performance of Adaptive Array in a Dynamic Environment

    Publication Year: 1987, Page(s):485 - 492
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1444 KB)

    The performance of adaptive arrays for jamming cancellation isdegraded due to relative angular movements between the arrayelements and the signal sources in space. We consider small angularvariations about the steady state of a linear (power inversion) arraycaused by either 1) a discrete angular jump, or 2) a continuousangular movement with constant angular velocity. Performancedegradation is asse... View full abstract»

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  • The Acquisition Probability for a Minimum Distance One-Class Classifier

    Publication Year: 1987, Page(s):493 - 499
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1819 KB)

    An approximation for the acquisition probability for a minimumdistance one-class classifier is derived. An exact expression for theacquisition probability is dependent upon the operatingcharacteristics in the distance space, the number of targets detected,and the number of other objects detected. An approximateexpression replaces the operating characteristics curve by a singlepoint. Experimental r... View full abstract»

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  • Multiple-Tone Signals and Detection Probabillities

    Publication Year: 1987, Page(s):500 - 508
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1740 KB)

    An analysis technique is presented for multiple-tone signals insystems employing noncoherent integration of a square-law detectoroutput. It is shown how the characteristic function for the teststatistic can be found from the easily determined "coherent"characteristic function defined in the two-dimensional signal space.This result is applied to two detection problems, the detection of multiple-ton... View full abstract»

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  • A Contention-Based TDMA Technique for Data Transmissions through Satellite

    Publication Year: 1987, Page(s):509 - 518
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1567 KB)

    The performance of a contention-based time-division multiple access (TDMA) technique is studied. Time axis of the channel is organized into frames. Each frame consists of three parts: minislot subframe, fixed subframe, and variable subframe. Users are partitioned into groups. Each group is given a data slot in the fixed subframe. A collision occurs when more than one user in the samegroup tries to... View full abstract»

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  • Dual Speed PN Ranging System for Tracking of Deep Space Probes

    Publication Year: 1987, Page(s):519 - 527
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1813 KB)

    A new pseudonoise (PN) ranging system is proposed for trackingof deep space probes, named the dual speed PN ranging system,that transmits two different PN sequences simultaneously through a PSK/PSK (phase-shift keying) dual speed communication channel.The dual speed PN ranging system improves the maximummeasurable range significantly, with no degradation of theacquisition time, when compared with ... View full abstract»

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  • Protection of PSK Communication Systems with Adaptive Arrays

    Publication Year: 1987, Page(s):528 - 536
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2237 KB)

    The performance of binary phase-shift-keyed (BPSK), binarydifferential phase-shift-keyed (DPSK), and quadrature phase-shift-keyed(QPSK) communication systems that use adaptive arrayantennas for interference rejection is examined. The case where thedesired signal is corrupted by continuous wave (CW) interference isspecifically addressed. The performance of the adaptive array andthe ideal BPSK, DPSK... View full abstract»

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  • The Exact Cramer-Rao Bound for Gaussian Autoregressive Processes

    Publication Year: 1987, Page(s):537 - 542
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1512 KB)

    An explicit expression is derived for the Cramer-Rao bound(CRB)on unbiased estimates of the parameters of autoregressiveprocesses, given a finite number of measurements. The expressionconverges to the well-known asymptotic form of the CRB when thenumber of measurements tends to infinity. The behavior of thebound is illustrated by some numerical examples. View full abstract»

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  • Scan Beam Antenna Intermodulation Improvement Due to Spatial Dispersion

    Publication Year: 1987, Page(s):543 - 557
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1841 KB)

    In the recent development of scan beams for application tomobile satellite or thin route communication systems, theintermodulation (IM) generated by the element amplifiers isspatially dispersed, such that some of the IM radiated energy failsoutside the intended beam area. In addition, some of the IM fallinginside the beam area have frequencies different from the carriersintended for that area.It i... View full abstract»

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  • Passive Position Location Estimation Using the Extended Kalman Filter

    Publication Year: 1987, Page(s):558 - 567
    Cited by:  Papers (49)  |  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2021 KB)

    Several papers have been published recently using the method ofleast squares for passive position location estimation. While the Kalman filter is mentioned as an alternative approach in most ofthese papers, none of the papers actually compare the performanceof the Kalman filter with the method of least squares. In this paper,the performances of the extended Kalman filter and the iteratedextended K... View full abstract»

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  • Detector Relative Efficiencies in the Presence of Laplace Noise

    Publication Year: 1987, Page(s):568 - 582
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1762 KB)

    The closed-form solution for Neyman-Pearson optimal detectorperformance for Laplace noise affords a rare opportunity for smalland intermediate sample relative efficiency studies. Indeed, the Laplace noise solution is the only known closed-form description fora non-Gaussian optimal detector of the type considered. Weillustrate numerically that, for stringent detector requirements,convergence of det... View full abstract»

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  • Spectral Properties of Homogeneous and Nonhomogeneous Radar Images

    Publication Year: 1987, Page(s):583 - 588
    Cited by:  Papers (25)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1376 KB)

    On the basis of a two-dimensional, nonstationary white noisemodel for the complex radar backscatter, the spectral properties ofa one-look synthetic-aperture radar (SAR) system is derived. It isshown that the power spectrum of the complex SAR image is sceneindependent. It is also shown that the spectrum of the intensityimage is in general related to the radar scene spectrum by a linearintegral equa... View full abstract»

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  • A Generalization of the Normalized LMS Algorithm

    Publication Year: 1987, Page(s):589 - 592
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (622 KB)

    As previously shown, the normalized least mean square (NLMS)algorithm has superior convergence properties than the least meansquare(LMS) algorithm. However, the weight noise effect of the NLMS algorithm is large so that the steady state residue power islarger than that for the LMS algorithm. A generalized NLMSalgorithm is developed based upon the pseudoinverse of anestimated covariance matrix. A p... View full abstract»

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  • Alpha-Beta Filter with Correlated Measurement Noise

    Publication Year: 1987, Page(s):592 - 594
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (460 KB)

    For many tracking applications, the measurement errors onsuccessive observations are correlated. Using a first-order Markov model for the correlation, we present analytical expressions for the time-varying covariance and gains of an alpha-beta tracking filter.To a good approximation, the effect of correlation is to increase the time interval between measurements by a factor (1+a)/(1-a),where a is ... View full abstract»

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  • Lens-Effect Loss for Distributed Targets

    Publication Year: 1987, Page(s):594 - 595
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (267 KB)

    The atmosphere, acting like a lens, causes a small loss in radarsignal strength [1]. Unlike atmospheric absorption [2], the lenseffect loss is different for distributed targets versus point targets.For a distributed target uniformly filling the radar beam, the lens effect loss (in decibels) is one-half the lens-effect loss for point targets. View full abstract»

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  • Comments on "Analytical Steady-State Solution for a Continuous Time Kalman Filter"

    Publication Year: 1987, Page(s):596 - 597
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (253 KB)

    The analytical expression for the steady-state solution to acontinuous-time Kalman filter with two state variables consideredby Ekstrand is found by directly solving the continuous-timealgebraic Ricatti equation. View full abstract»

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  • Comments on "On a Specific Performance Limitation of Partially Adaptive Antennas"

    Publication Year: 1987, Page(s): 598
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (244 KB)

    The analysis presented in the above paper' for the performancedegradation of a partially adaptive antennna with unresolvedinterference components is related to earlier work on the samesubject. 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