By Topic

IEEE Transactions on Aerospace and Electronic Systems

Issue 4 • Oct. 1999

Filter Results

Displaying Results 1 - 25 of 37
  • Author index

    Publication Year: 1999, Page(s):1480 - 1485
    Cited by:  Papers (1)
    Request permission for commercial reuse | PDF file iconPDF (665 KB)
    Freely Available from IEEE
  • Subject index

    Publication Year: 1999, Page(s):1485 - 1503
    Request permission for commercial reuse | PDF file iconPDF (1596 KB)
    Freely Available from IEEE
  • Partial eigenstructure assignment algorithm in flight control system design

    Publication Year: 1999, Page(s):1403 - 1409
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    A new algorithm is proposed for assigning some of the eigenvalues to the desired places while guaranteeing the stability of the closed-loop system. For partial eigenstructure assignment, the null space approach is utilized, and additional feedback is used to stabilize the remaining eigenvalues. The quadratic type performance index is chosen to determine the additional feedback gain lying on the co... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Generalized input-estimation technique for tracking maneuvering targets

    Publication Year: 1999, Page(s):1388 - 1402
    Cited by:  Papers (42)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (740 KB)

    A new input estimation technique for target tracking problem is proposed. Conventional input estimation techniques assume that the target maneuver level is constant within the detection window, which has been the major drawback of the techniques. The proposed technique is developed to overcome this drawback by modeling the target maneuver as a linear combination of some basic time functions. The r... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Probability of error for BPSK modulation from electrostatic interference [in orbital situation]

    Publication Year: 1999, Page(s):1383 - 1387
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB)

    In an orbital situation any spacecraft is bombarded by charged particles that span a broad range of energies. Some of the particles may be trapped within the materials of the spacecraft. Recent data indicates that an S-band phased-array antenna on a spacecraft may experience electrostatic discharges from such ion deposition at the elements of the array. These discharges may induce RF interference ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Multipath interferometry technique for airborne array calibration

    Publication Year: 1999, Page(s):1369 - 1382
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (908 KB)

    A new technique is developed to compensate multiple-wavelength distortion in airborne antenna arrays. This approach exploits the phase information in microwave reflections from arbitrary terrain. To handle reflections incident over a broad angle, a range-Doppler preprocessor is used in each element channel to resolve wavefronts incident simultaneously from different directions. The phase informati... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Predicting the visibility of LEO satellites

    Publication Year: 1999, Page(s):1183 - 1190
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (448 KB)

    We present a simple algorithm to determine the visibility-time function of a circular low Earth orbit (LEO) satellite at a terminal on the Earth's surface. The simplicity of the algorithm is based on approximating the ground trace of the satellite (which is not a great circle due to Earth's rotation) during a time interval of the order of in-view period, by a great-circle are. This enables us to u... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Estimation of the parameters of the K-distribution using higher order and fractional moments [radar clutter]

    Publication Year: 1999, Page(s):1453 - 1457
    Cited by:  Papers (55)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (260 KB)

    We propose a method for estimating the parameters of the K-distribution in a manner which significantly reduces computational requirements when compared with existing approaches. Additionally, the method yields parameter estimates with lower variance when compared with standard techniques View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • SAR image formation via semiparametric spectral estimation

    Publication Year: 1999, Page(s):1318 - 1333
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1256 KB)

    A new algorithm, referred to as the SPAR (Semiparametric) algorithm, is presented herein for target feature extraction and complex image formation via synthetic aperture radar (SAR). The algorithm is based on a flexible data model that models each target scatterer as a two-dimensional (2-D) complex sinusoid with arbitrary unknown amplitude and constant phase in cross-range and with constant amplit... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Overview of multiple satellite communication networks

    Publication Year: 1999, Page(s):1362 - 1368
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (488 KB)

    Recently interest in packet communications has stimulated an interest in constellations of low altitude satellites. Such a configuration would have less propagation delay and be cheaper to launch than satellites at higher or geosynchronous altitude. However, many more satellites are necessary at low altitude to achieve reasonable coverage of the earth and insure availability of the resource. Furth... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Small satellite access of the Space Network

    Publication Year: 1999, Page(s):1173 - 1182
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (596 KB)

    Small satellites have been perceived as having limited access to NASA's Space Network (SN). The potential for satellite access of the Space Network when the design utilizes a fixed antenna configuration and low-power, coded transmission is analyzed. From the analysis, satellites using this configuration in high-inclination orbits are shown to have a daily data throughput in the 100 to 1000 Mbit ra... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Spectral distortion in pulsed class-C amplifiers

    Publication Year: 1999, Page(s):1450 - 1453
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (220 KB)

    An important problem in solid-state radar transmitters using class-C pulsed amplifiers is the spectral distortion generated during the fall time of the RF pulse. The widening of the spectrum is commonly corrected with cavity filters. In this paper, the sources and the nature of such a distortion are explained. A novel technique to avoid it based on bias modulation of a low power stage at the begin... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Even-odd transformation with application to multiuser CW radars

    Publication Year: 1999, Page(s):1466 - 1470
    Cited by:  Papers (4)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (260 KB)

    An even odd transformation is a linear phase transformation which translates a set of sequences into another set, all of whose absolute even (also called periodic) and odd correlation functions become the respective absolute odd and even correlation functions of the original set. This transformation enables the choice of periodic or odd-periodic sequence sets to simplify the implementation of a mu... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Optimal parity vector sensitive to designated sensor fault

    Publication Year: 1999, Page(s):1122 - 1128
    Cited by:  Papers (26)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    Based on the parity space construction and the orthogonal constraint condition of parity vector, the approach of fault detection and isolation using optimal parity vector is presented. Its main idea is to design a performance criterion similar to the criterion presented by Zhang and Patton (1993), but most sensitive to the designated sensor's fault and least sensitive to other sensor's fault and u... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Single-stage converters for PV lighting systems with MPPT and energy backup

    Publication Year: 1999, Page(s):1306 - 1317
    Cited by:  Papers (13)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (624 KB)

    Single-stage converters (SSCs) are proposed for applications of photovoltaic powered lighting system (PPLS). The synchronous switch technique is employed to develop the SSCs which can fulfill maximum power point tracking (MPPT), battery charging, discharging, and lamp ballasting features. Several typical SSCs are discussed. One of the proposed SSCs, which is the integration of a buck-boost charger... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Time delay estimation with multiple looks in colored Gaussian noise

    Publication Year: 1999, Page(s):1354 - 1361
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (348 KB)

    We present an efficient algorithm for high resolution time delay estimation in colored Gaussian noise with multiple looks. By using a relaxation-based optimization approach and exploiting the Toeplitz property of the noise covariance matrix, the enhanced new algorithm can achieve the corresponding Cramer-Rao bounds (CRBs) with a very small number of independent looks View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • State estimation using an approximate reduced statistics algorithm

    Publication Year: 1999, Page(s):1161 - 1172
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (588 KB)

    The problem of state estimation using nonlinear additive Gaussian noise measurements is addressed. A geometric model for the posterior state density is assumed based on a multidimensional Haar basis representation. An approximate reduced statistics (ARS) algorithm, suggested by the parameter estimator of Kulhavy is then developed, using successive minimization of relative entropy between model den... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Integer ambiguity resolution in GPS for spinning spacecrafts

    Publication Year: 1999, Page(s):1219 - 1229
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (600 KB)

    A procedure to compute the integer ambiguity problem when a GPS receiver is used in a multiple antenna configuration attached to a rotating spacecraft is presented. The method is applied to a simulation of an experimental satellite which uses the GPS receiver for attitude determination View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Wideband quadrature error correction (using SVD) for stepped-frequency radar receivers

    Publication Year: 1999, Page(s):1444 - 1449
    Cited by:  Papers (10)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (348 KB)

    We present a new technique which corrects the wideband quadrature errors associated with homodyne stepped frequency radar receivers. The correction algorithm is derived using singular value decomposition (SVD) which diagonalizes and scales the covariance matrix of a test signal while preserving the coherent phasor alignment across all frequency steps of the homodyne receiver. Using our technique, ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Alternate forms of the PWM switch models

    Publication Year: 1999, Page(s):1283 - 1292
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (512 KB)

    Vorperian's pulsewidth modulation (PWM) switch model consists of a PWM transformer and a nonlinear resistor. The recognition that any of the three transformer terminals can serve as the common terminal leads to two alternate PWM transformer models and the corresponding two alternate PWM switch models. For a given PWM dc-dc converter, one of the three PWM switch models is more “natural”... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Performance of distributed CFAR test under various clutter amplitudes

    Publication Year: 1999, Page(s):1410 - 1419
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (624 KB)

    We evaluate the performances of several distributed constant false-alarm rate (CFAR) tests operating in different background clutter conditions. The analysis considers the detection of Rayleigh target in various clutters with the possibility of differing clutter power levels in the test cells of distributed radars. Numerical results studied for a two-radar system show how the false-alarm rate of t... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Mini-UAV altitude estimation using an inertially stabilized payload

    Publication Year: 1999, Page(s):1191 - 1203
    Cited by:  Papers (5)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (768 KB)

    A novel method is introduced for autonomous attitude estimation of a mini unmanned aerial vehicle (UAV) carrying an inertially stabilized payload. The method is based on utilizing the outputs of rate gyros normally used to inertially stabilize the payload, and other data that is normally available from conventional aircraft-mounted sensors. A decentralized estimation algorithm is developed, which ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • On distributed signal detection with multiple local free parameters

    Publication Year: 1999, Page(s):1457 - 1466
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (596 KB)

    In this work, we propose an efficient approach to the optimization of distributed multiradar systems with parallel topology, employing decision fusion from local detectors with discrete and continuous free design parameters. This approach, termed hierarchical optimization approach, can be applied to a variety of optimization criteria including the Neyman-Pearson (NP) and the locally optimum detect... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Single-phase three-level rectifier and random PWM inverter drives

    Publication Year: 1999, Page(s):1334 - 1343
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (568 KB)

    A novel ac/dc/ac converter topology with three-level pulsewidth modulated (PWM) scheme for the single-phase ac/dc rectifier and random PWM scheme for ac drives is proposed. In order to improve the power quality in the single-phase rectifier, a ROM-based (read-only memory) control scheme, based on hysteresis current comparator, region detector, and capacitor compensator, is used to achieve a sinuso... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Passive localization of frequency-agile radars from angle and frequency measurements

    Publication Year: 1999, Page(s):1129 - 1144
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (820 KB)

    It is well known that the position of a stationary radar can be estimated by a single moving observer from angle and/or frequency measurements taken passively at different points in its trajectory. Depending on the measurement set different localization methods result: the bearing method (BM), the frequency method (FM), and the combined method (CM). Previous studies analyze the three methods on th... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.

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