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IEEE Transactions on Aerospace and Electronic Systems

Issue 1 • Date Jan. 1999

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Displaying Results 1 - 25 of 36
  • Comments on "Bearings-only and Doppler-bearing tracking using instrumental variables"

    Publication Year: 1999, Page(s):370 - 371
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (166 KB)

    The work carried out by Y.T. Chan and S.W. Rudnicki [ibid., vol. 28, pp. 1076-82, 1992] is very useful for studies in underwater target motion analysis. They presented a simple procedure so that the dimension of the target state vector need not be increased. While implementing their work, I tried to rederive the equations and found that there is a confusion in one of the equations, which I discuss... View full abstract»

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  • Call for papers

    Publication Year: 1999, Page(s): 380
    Request permission for commercial reuse | PDF file iconPDF (23 KB)
    Freely Available from IEEE
  • Design and comparison of mode-set adaptive IMM algorithms for maneuvering target tracking

    Publication Year: 1999, Page(s):343 - 350
    Cited by:  Papers (45)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (620 KB)

    The variable-structure multiple model (MM) state estimation approach is utilized for maneuvering aircraft (MA) radar tracking. Two adaptive time-varying mode-set interacting multiple model (IMM) tracking filters are designed and investigated: switching grid (SG) IMM and adaptive grid (AG) IMM algorithms, By Monte Carlo simulations the performances of the algorithms and the respective fixed grid (F... View full abstract»

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  • Robust variable structure speed control for induction motor drive

    Publication Year: 1999, Page(s):215 - 224
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (876 KB)

    In order to eliminate the effect of parameter variation on field-oriented control for induction motor drive, an adaptation algorithm for tuning the rotor time-constant is proposed. Based on the adaptive observation of the rotor flux linkages, the rotor time-constant is adapted to obtain an exact indirect-field-oriented control (IFOC). In this proposed algorithm, a related function to the variation... View full abstract»

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  • Transmitter model for the design of communication satellites

    Publication Year: 1999, Page(s):31 - 42
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1016 KB)

    The paper proposes a modeling approach for satellite communication systems able to relate analytically the on-board transmitter reliability to the effective isotropic radiated-power (EIRP) requirement. The latter, in fact, plays a key role in system design, yielding a direct impact on transmitter configuration and technological features. In addition, that requirement is directly related to the ant... View full abstract»

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  • Decimating pseudorandom noise receiver

    Publication Year: 1999, Page(s):338 - 343
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (476 KB)

    A pseudorandom noise (PN) coded CW radar with a novel decimating digital correlator is discussed. The motivation for using this decimation technique is to reduce the analog-to-digital (A/D) sampling rate and corresponding digital signal processing (DSP) rates. This provides the radar designer the ability to improve the range resolution of the radar beyond the current capabilities of A/D and DSP ha... View full abstract»

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  • Phase quantized SAR signal processing: theory and experiments

    Publication Year: 1999, Page(s):201 - 214
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2548 KB)

    A complete theory of synthetic aperture radar (SAR) processing from phase-only data is presented, for both analogue and coded raw signals and reference functions. Appropriate processing architectures are presented as well as quality indexes to judge performance of the selected coding. The analysis encompasses both images and interferometric fringes for interferometry SAR (IFSAR) application. Theor... View full abstract»

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  • Dynamic modeling of flexible multibody structures

    Publication Year: 1999, Page(s):148 - 156
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (652 KB)

    This work is primarily concerned with the development of a mathematical formulation capable of treating the problems of maneuvering and control of flexible multibody structures. The analytical formulation is based upon equations of motion in terms of quasi-coordinates derived for each substructure independently. The individual substructures are made to act as a single structure by means of a consi... View full abstract»

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  • Robust detection of small stochastic signals

    Publication Year: 1999, Page(s):15 - 30
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1120 KB)

    We consider the problem of detecting a stochastic signal in white not-necessarily-Gaussian noise, using vector valued observations. The locally optimal detector is presented and its performance evaluated. The least-favorable signal spectrum and noise density (over specified classes) are found, and it is shown that the detector using these least-favorable assumptions is minimax robust. The class of... View full abstract»

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  • 3D guidance law modeling

    Publication Year: 1999, Page(s):72 - 83
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1064 KB)

    Proportional navigation (PN) guidance laws (GLs) have been widely used and studied in the guidance literature. But most of the guidance literature on PN has concentrated on the evaluation of empirical PNGLs or GLs obtained from very specific optimality considerations. The authors present a novel approach (called guidance laws modeling) to derive new GLs. They consider the basic requirements of cap... View full abstract»

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  • Two-dimensional adaptive array for spatially separating and tracking uncorrelated sources

    Publication Year: 1999, Page(s):93 - 101
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (704 KB)

    A new structure for the separation and tracking of uncorrelated sources through the use of a 2-dimensional adaptive array is proposed and investigated. The structure consists of a matrix preprocessing beamformer designed to result in outputs which are due to individual sources in the steady state. The preprocessing weights of the beamformer are calculated using the estimated locations of the sourc... View full abstract»

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  • Airport surface surveillance with a network of miniradars

    Publication Year: 1999, Page(s):331 - 338
    Cited by:  Papers (14)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (772 KB)

    A distributed system based on a network of short-range (1.5-3 km) radars, operating in the W-band (93-95 GHz), is proposed for the ground surveillance of airports. Both the architecture and the main features of each subsystem are described. The system can boast very high resolution, the elimination of shadowing, and the inclusion of image processing techniques in the track-while-scan (TWS) functio... View full abstract»

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  • Radar processing gain improvement over frequency using the discrete wavelet transform

    Publication Year: 1999, Page(s):363 - 368
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (424 KB)

    The range-gated fast Fourier transform (FFT) is the most common implementation of the optimum receiver for radar signals having random phase, frequency, and arrival time. In practice, the receiver is only optimum for input signals with frequency equal to an FFT bin frequency. Here the discrete wavelet transform (DWT) is applied to the FFT output to recover processing gain (PG) lost for nonoptimum ... View full abstract»

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  • SAR imaging of moving targets

    Publication Year: 1999, Page(s):188 - 200
    Cited by:  Papers (210)  |  Patents (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1644 KB)

    A method of forming synthetic aperture radar (SAR) images of moving targets without using any specific knowledge of the target motion is presented. The new method uses a unique processing kernel that involves a one-dimensional interpolation of the deramped phase history which we call keystone formatting. This preprocessing simultaneously eliminates the effects of linear range migration for all mov... View full abstract»

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  • High resolution radar clutter statistics

    Publication Year: 1999, Page(s):43 - 60
    Cited by:  Papers (79)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1628 KB)

    The generalized compound probability density function (GC-pdf) is presented for modeling high resolution radar clutter. In particular, the model is used to describe deviation of the speckle component from the Rayleigh to Weibull or other pdfs with longer tails. The GC-pdf is formed using the generalized gamma (GΓ) pdf to describe both the speckle and the modulation component of the radar clu... View full abstract»

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  • Hybrid high frequency AC power distribution architecture for telecommunication systems

    Publication Year: 1999, Page(s):138 - 147
    Cited by:  Papers (20)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (804 KB)

    A novel high frequency hybrid power distribution system for telecommunication applications is presented. The proposed hybrid system combines the advantages of both the sinusoidal voltage and current types of high frequency distribution systems and it has advantages such as connectorless power transfer, fuseless protection, sinusoidal voltage and current distribution and, high overall system effici... View full abstract»

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  • Radar synthetic vision system for adverse weather aircraft landing

    Publication Year: 1999, Page(s):2 - 14
    Cited by:  Papers (13)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2500 KB)

    A synthetic vision system (SVS) is described for aid in landing aircraft in poor weather conditions. The system consists of a scanning millimeter wave radar, heads-up display and real-time signal processing hardware. A suite of fast image processing algorithms are used for enhancing and displaying of the imagery. The system has been tested in number of tower and flight demonstration during actual ... View full abstract»

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  • Block floating point for radar data

    Publication Year: 1999, Page(s):308 - 318
    Cited by:  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (916 KB)

    Integer, floating point, and block floating point (BFP) data formats are analyzed and compared in order to establish the mathematical tools for selection of an optimal format which fulfils the demands of high resolution radar (SAR) data to large dynamic range and adequate S/N. The analysis takes quantization noise and saturation distortion into account and concludes that it is preferred to use sma... View full abstract»

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  • Position fix from three GPS satellites and altitude: a direct method

    Publication Year: 1999, Page(s):350 - 354
    Cited by:  Papers (13)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    A method to find a direct solution to GPS equations given four pseudo-range measurements and satellite positions is given by L.O. Krause [1987]. This method is modified here to find a direct solution given three pseudo-ranges and satellite positions and altitude above the reference ellipsoid View full abstract»

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  • Multiple-model estimation with variable structure. III. Model-group switching algorithm

    Publication Year: 1999, Page(s):225 - 241
    Cited by:  Papers (45)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1528 KB)

    A general multiple-model (MM) estimator with a variable structure (VSMM), railed model-group switching (MGS) algorithm, is presented. It assumes that the total set of models can be covered by a number of model groups, each representing a cluster of closely related system behavior patterns or structures, and a particular group is running at any given time determined by a hard decision. This algorit... View full abstract»

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  • Neural and fuzzy reconstructors for the virtual flight data recorder

    Publication Year: 1999, Page(s):61 - 71
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (852 KB)

    The results are presented of a comparative study evaluating the performance of neural network (NN) and fuzzy logic reconstructors (FLRs) for the development of a virtual flight data recorder (VFDK). Typical flight data recorders (FDRS) on commercial airliners do not record the aircraft control surface deflections. These dynamic parameters are critical in the investigation of an accident or an unco... View full abstract»

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  • Automatic target recognition using enhanced resolution SAR data

    Publication Year: 1999, Page(s):157 - 175
    Cited by:  Papers (39)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2412 KB)

    Using advanced technology, a new automatic target recognition (ATR) system has been developed that provides significantly improved target recognition performance compared with ATR systems that use conventional synthetic aperture radar (SAR) image-processing techniques. This significant improvement in target recognition performance is achieved by using a new superresolution image-processing techniq... View full abstract»

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  • Design and analysis of a regulated peak-power tracking system

    Publication Year: 1999, Page(s):84 - 92
    Cited by:  Papers (11)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (776 KB)

    A regulated peak-power tracking (RPPT) system for space power application is proposed. Large-signal stability analysis is provided to understand the main four different modes of operations of the system, as well as the mode transitions. A simple and effective control scheme for the system is also proposed. Small-signal analysis is performed thereafter to provide design optimization, and the predic... View full abstract»

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  • Efficient recursive state estimator for dynamic systems without knowledge of noise covariances

    Publication Year: 1999, Page(s):102 - 114
    Cited by:  Papers (21)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1056 KB)

    An efficient recursive state estimator for dynamic systems without knowledge of noise covariances is suggested. The basic idea for this estimator is to incorporate the dynamic matrix and the forgetting factor into the least squares (LS) method to remedy the lack of knowledge of noises. We call it the extended forgetting factor recursive least squares (EFRLS) estimator. This estimator is shown to h... View full abstract»

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  • Doppler ambiguity resolution using optimal multiple pulse repetition frequencies

    Publication Year: 1999, Page(s):371 - 379
    Cited by:  Papers (8)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (540 KB)

    Ferrari, Berenguer, and Alengrin (ibid., vol. 33, pp. 738-51, 1997) proposed an algorithm for velocity ambiguity resolution in coherent pulsed Doppler radar using multiple pulse repetition frequencies (PRFs). In this algorithm, two step estimations (folded frequency and ambiguity order) for the Doppler frequency is used by choosing particular PRF values. The folded frequency is the fractional part... 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