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
  • Narrowband channel model for aeronautical telemetry

    Publication Year: 2000, Page(s):1371 - 1376
    Cited by:  Papers (18)
    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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  • Performance of split-window multipass-mean noise spectral estimators

    Publication Year: 2000, Page(s):1360 - 1370
    Cited by:  Papers (3)
    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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  • 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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  • 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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  • Adaptive fuzzy mixed H2/H attitude control of spacecraft

    Publication Year: 2000, Page(s):1343 - 1359
    Cited by:  Papers (36)
    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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  • Divisible load scheduling on single-level tree networks with buffer constraints

    Publication Year: 2000, Page(s):1298 - 1308
    Cited by:  Papers (28)
    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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  • Sensorless synchronous reluctance drive with standstill starting

    Publication Year: 2000, Page(s):1232 - 1241
    Cited by:  Papers (20)
    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 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 (61)
    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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  • Feedback median filter for robust preprocessing of glint noise

    Publication Year: 2000, Page(s):1026 - 1035
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (708 KB)

    Glint noise may arise in a target tracking system. The non-Gaussian behavior of glint noise can severely degrade the tracking performance. Measurement preprocessing at the front-end of the tracker is an effective method to reduce glint noise. The preprocessor proposed by Hewer, Martin, and Zeh (1987), which used the computationally intensive M-estimator, may not be suitable for practical implement... 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 (28)
    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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  • Optimality for data fusion of detectors using Voronoi cells

    Publication Year: 2000, Page(s):1396 - 1400
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (352 KB)

    The problem of optimal signal classification with distributed sensors and restricted communication channels is considered. The classifier is to decide if a signal is in one of several possible classes after being observed through a suite of sensors, each sensor giving rise to a soft classification. The local classifiers are assumed to be based on a Voronoi decomposition of the associated sensor ou... View full abstract»

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  • Ratio of Gaussian PIM to two-carrier PIM

    Publication Year: 2000, Page(s):1336 - 1342
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (444 KB)

    Passive intermodulation (PIM) products falling into a satellite's receiver can adversely affect its gain/system temperature (G/T). The PIM when all carriers are active and modulated, can be simulated by a flat power spectrum. The ratio of the resulting distortion to a two-carrier measurement is calculated in this work. For PIM not to degrade the satellite's G/T, it should be 20 dB or more below th... 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 (10)
    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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  • 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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  • Frequency stability in adaptive retrodirective arrays

    Publication Year: 2000, Page(s):1219 - 1231
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (932 KB)

    The frequency stability of communications or remote sensing systems using phase conjugation as a means of retrodirective signaling is developed under the influence of constant rectilinear motion. The results indicate that for dynamic mobile platforms such as aircraft, helicopters, and ground vehicles the retrodirective properties of phase conjugating arrays are not guaranteed due to a possible ins... 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 (19)
    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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  • Starter/generator employing resonant-converter-fed induction machine. I. Analysis

    Publication Year: 2000, Page(s):1309 - 1328
    Cited by:  Papers (17)
    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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  • Parametric models for helicopter identification using ANN

    Publication Year: 2000, Page(s):1242 - 1252
    Cited by:  Papers (12)
    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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  • Detection performance of CFAR detectors based on order statistics for partially correlated chi-square targets

    Publication Year: 2000, Page(s):1423 - 1429
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (460 KB)

    The order statistics cell averaging (OSCA) constant false alarm rate (CFAR) and the order statistics greatest of (OSGO) CFAR detectors have the advantages of the order statistics (OS) CFAR detector, while the processing time of the OSCA and the OSGO CFAR detectors is less than that of the OS CFAR detector. This paper describes the exact formulas of the false alarm and the detection probabilities o... 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 (43)
    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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  • 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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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
Michael Rice
Brigham Young University