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IEEE Transactions on Aerospace and Electronic Systems

Issue 4 • Date Oct. 2000

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Displaying Results 1 - 25 of 43
  • Comment on "Steady-state tracking with LFM waveforms"

    Publication Year: 2000, Page(s):1406 - 1407
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (71 KB)

    The purpose of this note is to point out that, if appropriate normalizations are applied, the numerical data presented by W. Wong & W.D. Blair [ibid. vol.36, pp.701-709 (2000)] has much broader applicability than is implied there. View full abstract»

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  • Author index

    Publication Year: 2000, Page(s):1 - 6
    Request permission for commercial reuse | PDF file iconPDF (565 KB)
    Freely Available from IEEE
  • Subject index

    Publication Year: 2000, Page(s):6 - 26
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    Freely Available from IEEE
  • Three-dimensional trajectory estimation from image position and velocity

    Publication Year: 2000, Page(s):1075 - 1089
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (868 KB)

    A recursive algorithm for estimating the three-dimensional trajectory and structure of a moving rigid object in an image sequence has been previously developed by Broida, Chandrashekhar, and Chellappa [1990]. Since then, steady advances have occurred in the calculation of optical flow. This work improves 3D motion trajectory and structure estimation by incorporating optical flow into the estimatio... View full abstract»

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  • PCM/FM aeronautical telemetry in frequency selective multipath interference

    Publication Year: 2000, Page(s):1090 - 1098
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (572 KB)

    The performance of PCM/FM using a delay-line detector in multipath interference is analyzed. In aeronautical telemetry applications, the multipath interference causes a in the signal spectrum which is web modeled by a channel composed of a line-of-sight signal and a strong specular reflection with magnitude Γ and excess delay less than a bit time. Analysis shows that the bit error probabilit... View full abstract»

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  • Soft-switching single-stage AC-to-DC converter with low harmonic distortion

    Publication Year: 2000, Page(s):1190 - 1203
    Cited by:  Papers (3)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1048 KB)

    A 1 φ high-frequency (HF) transformer isolated, soft-switching single-stage ac-dc converter with low line-current harmonic distortion is presented. Its operation is explained with equivalent circuits for the various intervals. The converter is analyzed and design curves are obtained. An optimization parameter is introduced and a systematic design procedure is illustrated with a design example.... View full abstract»

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  • Evaluating a linear predictive algorithm for bandwidth conservation

    Publication Year: 2000, Page(s):1407 - 1414
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (584 KB)

    A predictive algorithm for bandwidth conservation and enhanced situation awareness is described and evaluated. In such a system, knowledge of position and intent of the participants involved in the operation must be readily available, and distributed to other units by communications link. This objective can be achieved by predicting position tracks of each unit ahead in time, based on past kinemat... View full abstract»

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  • Parametric models for helicopter identification using ANN

    Publication Year: 2000, Page(s):1242 - 1252
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (956 KB)

    An artificial neural network (ANN) based helicopter identification system is proposed. The feature vectors are based on both the tonal and the broadband spectrum of the helicopter signal, ANN pattern classifiers are trained using various parametric spectral representation techniques. Specifically, linear prediction, reflection coefficients, cepstrum, and line spectral frequencies (LSF) are compare... View full abstract»

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  • Adaptive fuzzy mixed H2/H attitude control of spacecraft

    Publication Year: 2000, Page(s):1343 - 1359
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1140 KB)

    This paper presents an adaptive fuzzy mixed H2/H attitude control of nonlinear spacecraft systems with unknown or uncertain inertia matrix and external disturbances. Using an adaptive fuzzy approximation method, an uncertain nonlinear model is estimated. Then, by a mixed H2 and H attitude control design, the effect of external disturbance a... View full abstract»

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  • On detection using filter banks and higher order statistics

    Publication Year: 2000, Page(s):1179 - 1189
    Cited by:  Papers (6)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (804 KB)

    We suggest a method, based on the use of filter bank and higher order statistics (cumulants), for detection of transient signals. The method first uses a bandpass filter bank, which separates the spectrum of the observed signal into narrow frequency bands. Each subfilter of the filter bank is then followed by a cumulant estimator, and thereby suppressing colored noise. By selecting those subfilter... View full abstract»

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  • Performance of decentralized L-CFAR detection in inhomogeneous background

    Publication Year: 2000, Page(s):1414 - 1423
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (740 KB)

    The problem of decentralized constant false alarm rate (CFAR) detection, with L-CFAR remote sensors, is considered. Following a previous paper, concerning the design and the analysis of such detection structure in homogeneous environment, we now assume that a detector, designed to operate with homogeneous background, is affected instead by clutter edges and secondary targets entering the local sen... View full abstract»

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  • Performance analysis of two adaptive radar detectors against non-Gaussian real sea clutter data

    Publication Year: 2000, Page(s):1429 - 1439
    Cited by:  Papers (44)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (932 KB)

    The performance of two adaptive detection schemes developed in the literature, Kelly's generalized likelihood ratio test (GLRT) and the adaptive linear-quadratic (ALQ) detector, are tested on real sea clutter data recorded by the IPIX experimental radar. The results of first- and second-order statistical analyses performed on two data sets are reported. Amplitude analysis has been carried out by c... View full abstract»

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  • Starter/generator employing resonant-converter-fed induction machine. II. Hardware prototype

    Publication Year: 2000, Page(s):1319 - 1329
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (860 KB)

    The feasibility of operation of a new procedure to start a jet engine (JE) and to generate power by means of a single induction machine (IM) directly coupled to the turbine has been shown by means of a hardware prototype. An introduction, background, operation principle of this type of a system and software simulation portion was presented in Part I. Both in software simulation and in the experime... View full abstract»

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  • Performance of split-window multipass-mean noise spectral estimators

    Publication Year: 2000, Page(s):1360 - 1370
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (808 KB)

    Spectrogram background normalization for narrowband passive acoustic detection systems has a long history, and the split-window three-pass mean noise spectral estimator (S3PM NSE) is currently a standard in this regard. As yet, however, there is no analytical design methodology for choosing the window parameters and shearing thresholds for the S3PM NSE. That deficiency is remedied here by deriving... View full abstract»

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  • Satellite communication system integrated into terrestrial ISDN

    Publication Year: 2000, Page(s):1047 - 1057
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (892 KB)

    This paper presents an advanced satellite communication system named DYANET II. This system uses satellite channels as subscriber lines for ISDN customers as well as trunk circuits for overflow traffic. The system can offer the same ISDN services to satellite customers as those available to terrestrial subscribers in terms of numbering, signaling, and charging systems as well as user-network inter... View full abstract»

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  • 2D model-based step-track procedure

    Publication Year: 2000, Page(s):1386 - 1391
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (484 KB)

    A 2D model-based generalization of the gradient step-track is introduced and simulation results are presented showing an overall tracking accuracy improvement and limit signal-to-noise ratio (SNR) advantage over the hill-climbing and the gradient procedures. At best, the new method is shown to allow a worse than 20 dB SNR in tracking a near geosynchronous satellite. View full abstract»

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  • Divisible load scheduling on single-level tree networks with buffer constraints

    Publication Year: 2000, Page(s):1298 - 1308
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (904 KB)

    Scheduling a divisible load on a heterogeneous single-level tree network with processors having finite-size buffers is addressed. We first present the closed-form solutions for the case when the available buffer size at each site is assumed to be infinite. Then we analyze the case when these buffer sizes are of finite size. For the first time in the domain of DLT (divisible load theory) literature... View full abstract»

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  • Detection of hidden Markov model transient signals

    Publication Year: 2000, Page(s):1253 - 1268
    Cited by:  Papers (26)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1260 KB)

    Addressed here is the quickest detection of transient signals which can be represented as hidden Markov models (HMMs), with the application of detection of transient signals. Relying on the fact that Page's test is equivalent to a repeated sequential probability ratio test (SPRT), we are able to devise a procedure analogous to Page's test for dependent observations. By using the so-called forward ... View full abstract»

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  • Robot-aided remote inspection experiment on STS-85

    Publication Year: 2000, Page(s):1290 - 1297
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1044 KB)

    The results are presented for the robot-aided spacecraft inspection experiments using a flaw detection algorithm called multi-images overcast (MIO), which were conducted as an extension of NASDA's Manipulator Flight Demonstration mission installed on space shuttle mission STS-85. These experiments are the first step towards research and development of the Orbital Maintenance System to support spac... View full abstract»

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  • Narrowband channel model for aeronautical telemetry

    Publication Year: 2000, Page(s):1371 - 1376
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (552 KB)

    A narrowband channel model for multipath fading in aeronautical telemetry applications is described. This channel is composed of a line-of-sight signal, a specular reflection whose strength is 20% to 80% that of the line-of-sight signal, and a diffuse multipath component whose power is 10 to 20 dB less than that of the line-of-sight signal. Thus the channel is close to additive white Gaussian nois... View full abstract»

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  • Analysis of double-layer capacitors supplying constant power loads

    Publication Year: 2000, Page(s):1439 - 1443
    Cited by:  Papers (25)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (412 KB)

    Double-layer capacitors are a recent technology based on the well-known electrochemical phenomenon of extremely high capacitance/unit area in an electrode-electrolyte interface and the high surface area achievable in activated carbon fibers. Capacitances are available in the range of a few farads to a few hundred farads. The energy stored in a bank of double-layer capacitors is related to the capa... View full abstract»

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  • Coarse quantization for data compression in coherent location systems

    Publication Year: 2000, Page(s):1269 - 1278
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (812 KB)

    When emitter location systems measure time-difference-of-arrival (TDOA) and differential Doppler (DD) by coherently cross-correlating the signal pairs, data compression techniques are needed to facilitate data transfer of one of the signals to the receiving site of the other signal. Two block-adaptive quantization schemes are analyzed here to determine their impact on the signal-to-noise ratio (SN... View full abstract»

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  • Performance assessment of CFAR processors in Pearson-distributed clutter

    Publication Year: 2000, Page(s):1377 - 1386
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (728 KB)

    An analytical study on the performance of three existing classes of constant false alarm rate (CFAR) detectors operating in heavy tailed distributed data is presented. In particular, we study the performance of the cell averaging, order statistics, and p-percent truncated mean CFAR processors when the output measurements of the square-law detector can be modeled as positive alpha-stable (PαS... View full abstract»

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  • Navigation system design using time-varying complementary filters

    Publication Year: 2000, Page(s):1099 - 1114
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1088 KB)

    A new methodology for the design of navigation systems for autonomous vehicles is introduced. Using simple kinematic relationships, the problem of estimating the velocity and position of an autonomous vehicle is solved by resorting to special bilinear time-varying filters. These are the natural generalization of linear time-invariant complementary filters that are commonly used to properly merge s... View full abstract»

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  • Analytic models and postprocessing techniques for UWB SAR

    Publication Year: 2000, Page(s):1058 - 1074
    Cited by:  Papers (21)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1396 KB)

    The latest generation of fully polarimetric, ultra wideband (UWB), wide angle, low frequency, foliage and ground-penetrating synthetic aperture radars (SARs) record huge amounts of data that must be processed to focus high quality images. At the same time only a few small subimages contain important information. We investigate the relationship between the focused image and the reflectivity profile... 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