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IEEE Transactions on Aerospace and Electronic Systems

Issue 4 • 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
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    Freely Available from IEEE
  • Subject index

    Publication Year: 2000, Page(s):6 - 26
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    Freely Available from IEEE
  • Searching tracks

    Publication Year: 2000, Page(s):1149 - 1166
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1616 KB)

    Search theory is the discipline that studies the problem of how best to search for an object when the amount of searching efforts is limited and only probabilities of the possible position of the object are given. Then, the problem is to find the optimal distribution of this total effort that maximizes the probability of detection. Although the general formalism of search theory will be used subse... View full abstract»

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  • Matrix method synthesis of transmitting antenna for wireless power transmission

    Publication Year: 2000, Page(s):1142 - 1148
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (480 KB)

    The synthesis of the radiating structure of wireless power transmission (WPT) systems has some unique aspects. An important attribute is the efficiency of coupling the radiated energy into the receiving aperture. There are possibilities of improving the WPT by variations of the wave field distribution on the aperture and its configuration too. The matrix method of synthesis of the aforesaid struct... View full abstract»

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  • Robust sliding-mode control for the uncertain MIMO aircraft model F-18

    Publication Year: 2000, Page(s):1127 - 1141
    Cited by:  Papers (46)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1068 KB)

    Robust flight control laws based on variable structure control (VSC) theory and Lyapunov V-function method are designed for a simplified aircraft model F-18. A min-max control (MMC) and VSC laws are derived, for multi-input multi-output (MIMO) systems with plant uncertainties and input disturbance. Two types of robust feedback controllers MMC and VSC for uncertain MIMO systems are considered. For ... 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 (27)
    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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  • Fast converging adaptive processor or a structured covariance matrix

    Publication Year: 2000, Page(s):1115 - 1126
    Cited by:  Papers (83)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (784 KB)

    The use of adaptive linear techniques to solve signal processing problems is needed particularly when the interference environment external to the signal processor (such as for a radar or communication system) is not known a priori. Due to this lack of knowledge of an external environment, adaptive techniques require a certain amount of data to cancel the external interference. The number of stati... 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 (9)
    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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  • Navigation system design using time-varying complementary filters

    Publication Year: 2000, Page(s):1099 - 1114
    Cited by:  Papers (35)
    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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  • Performance of 10- and 20-target MSE classifiers

    Publication Year: 2000, Page(s):1279 - 1289
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1608 KB)

    MIT Lincoln Laboratory is responsible for developing the ATR (automatic target recognition) system for the DARPA-sponsored SAIP program; the baseline ATR system recognizes 10 GOB (ground order of battle) targets; the enhanced version of SAIP requires the ATR system to recognize 20 GOB targets. This paper presents ATR performance results for 10- and 20-target mean square error (MSE) classifiers usi... View full abstract»

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  • Detection of hidden Markov model transient signals

    Publication Year: 2000, Page(s):1253 - 1268
    Cited by:  Papers (31)  |  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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  • Experimental verification of noncoherent Doppler tracking at the Deep Space Network

    Publication Year: 2000, Page(s):1401 - 1406
    Cited by:  Papers (8)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    A recently developed noncoherent Doppler tracking technique has been experimentally verified at the NASA Deep Space Network (DSN) Test Facility. This technique permits highly accurate two-way Doppler measurements to he made with a simple transceiver system. The accuracy goal of 0.1 mm/s has been verified as well as the compatibility of the technique with the equipment, practices, and the radiometr... 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 (4)  |  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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  • Recursive control design for low frequency disturbance accommodation [and application to satellite attitude control]

    Publication Year: 2000, Page(s):1330 - 1335
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (424 KB)

    The problem of state estimation and regulation in the presence of uncertainty and low frequency disturbance is dealt with. A controller design method, based on input-output histories as well as a nominal model to attenuate the effects of the uncertainty and the disturbance is proposed. The state vector is predicted recursively using a past state vector, and a past input vector. By this property, t... View full abstract»

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  • Sensorless synchronous reluctance drive with standstill starting

    Publication Year: 2000, Page(s):1232 - 1241
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (716 KB)

    This paper presents a novel sensorless synchronous reluctance drive system. Based on the dynamic model of the synchronous reluctance motor (SRM), a new rotor position estimator is proposed. This estimator is only related to the rate change of the stator currents. It is not related to the parameters, speed, voltage, and external load of the motor. As a result, the estimator is simple and robust. Ba... 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 (2)
    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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  • Object-based SAR image compression using vector quantization

    Publication Year: 2000, Page(s):1036 - 1046
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1164 KB)

    A simple and elegant algorithm is presented to encode images with rich content, which allows easy access to various objects. An object-plane-based encoding method for compression of synthetic aperture radar (SAR) imagery is developed, with different object planes for target classes and background. A variable-rate residual vector quantization (VQ) algorithm is developed to encode the background inf... View full abstract»

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  • Modulo conversion method for estimating the direction of arrival

    Publication Year: 2000, Page(s):1391 - 1396
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB)

    A modulo conversion method for resolving phase ambiguity and consequently estimating the direction of arrival (DOA) of an electromagnetic wave incident on a multielement interferometer with nonuniform spacings is presented. The technique involves a step-by-step reduction of the number of ambiguities in the measured phase difference of the longest interelement spacing. A major advantage of this met... 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 (18)
    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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  • Analysis of double-layer capacitors supplying constant power loads

    Publication Year: 2000, Page(s):1439 - 1443
    Cited by:  Papers (42)
    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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  • Efficient wideband jammer ing when using stretch processing

    Publication Year: 2000, Page(s):1167 - 1178
    Cited by:  Papers (14)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1032 KB)

    Techniques are described for performing adaptive jammer ing over extremely wide bandwidths on radar systems which use linear frequency modulated (LFM) waveforms and stretch processing. It is assumed that the range uncertainty of the target is a small percentage of the equivalent range extent of the uncompressed pulse. The assumption allows the cancellation to take place following stretch processin... View full abstract»

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  • Starter/generator employing resonant-converter-fed induction machine. I. Analysis

    Publication Year: 2000, Page(s):1309 - 1328
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (784 KB)

    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 is presented. The JE is brought to an initial speed by the motoring operation of the IM. Later, the IM is taken into generating mode and the turbine is applied to its excitation. The turbine catches up and starts to drive the induction generator (IG). The gen... 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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  • Stability analysis of digital linear flight controllers subject to electromagnetic disturbances

    Publication Year: 2000, Page(s):1204 - 1218
    Cited by:  Papers (38)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1080 KB)

    High intensity electromagnetic radiation has been demonstrated to be a source of computer upsets in commercially available digital flight control systems. Such upsets can degrade the quality of the control signal ranging from a perturbation error over a few sample periods to a permanent error mode or computer failure. Under these conditions, the primary concern of the control engineer is to insure... 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