Scheduled System Maintenance
On Friday, October 20, IEEE Xplore will be unavailable from 9:00 PM-midnight ET. We apologize for the inconvenience.
Notice: There is currently an issue with the citation download feature. Learn more.

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
  • 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.
  • Novel single-switch converter with power factor correction

    Publication Year: 1999, Page(s):1344 - 1353
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (528 KB)

    A new single-stage single-switch power factor correction converter with output electrical isolation is presented. The configuration of this converter is achieved by combining a flyback circuit and a forward circuit in one power stage. The principle of operation and steady-state analysis of the proposed topology is given. Based on its steady-state operation constraints, a design procedure along wit... 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.
  • Performance of distributed CFAR test under various clutter amplitudes

    Publication Year: 1999, Page(s):1410 - 1419
    Cited by:  Papers (9)
    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.
  • Multiband coherent radar detection against compound-Gaussian clutter

    Publication Year: 1999, Page(s):1266 - 1282
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (888 KB)

    A Multiband GLRT-LQ (Generalized Likelihood Ratio Test-Linear Quadratic), MBGLRT-LQ, detector is derived for the coherent radar target detection against a compound-Gaussian clutter background. This scheme is an extension to the multiband case of the Asymptotically Optimum Detector (AOD), also derived under the name of GLRT-LQ in. The proposed multiband version of the algorithm shows two main advan... 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.
  • Optimal parity vector sensitive to designated sensor fault

    Publication Year: 1999, Page(s):1122 - 1128
    Cited by:  Papers (27)
    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.
  • 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.
  • Performance bounds for hot and cold clutter mitigation

    Publication Year: 1999, Page(s):1253 - 1265
    Cited by:  Papers (21)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (848 KB)

    A new method is presented for describing the theoretical interference space-time covariance matrix that will be observed in an adaptive airborne radar system under specific topographical conditions. Both hot clutter that is induced by interfering sources and cold clutter that results from the radar transmitter are considered. This method incorporates phenomenology observed under site specific cond... 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 (15)  |  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.
  • Generalized input-estimation technique for tracking maneuvering targets

    Publication Year: 1999, Page(s):1388 - 1402
    Cited by:  Papers (47)
    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.
  • 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.
  • Dynamic modeling and controller design of flyback converter

    Publication Year: 1999, Page(s):1230 - 1239
    Cited by:  Papers (28)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (528 KB)

    The accurate dynamic modeling and quantitative controller design for an isolated converter with optocoupler isolation in its feedback loop are considered to be difficult issues, since the transfer characteristics of some blocks are highly nonlinear and difficult to be modeled analytically. First a current-mode controlled flyback converter with an optically isolated feedback path is designed. Then ... 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.
  • Pade approximations to Rician statistical functions

    Publication Year: 1999, Page(s):1421 - 1428
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB)

    Approximations are derived for the statistical functions that characterize the matched filter output amplitude given a non-fluctuating point target and an arbitrary clutter model. The approximations are the inverse Hankel transform of a Pade approximation to their associated characteristic functions (CF) and can be used to calculate receiver operating characteristics (ROCs) 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.
  • Passive localization of frequency-agile radars from angle and frequency measurements

    Publication Year: 1999, Page(s):1129 - 1144
    Cited by:  Papers (18)
    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.
  • 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 (59)
    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.
  • Autofocusing of ISAR images based on entropy minimization

    Publication Year: 1999, Page(s):1240 - 1252
    Cited by:  Papers (237)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (748 KB)

    A novel autofocusing technique is developed for random translational motion compensation in inverse synthetic aperture radar (ISAR) imaging of objects. This technique is based on an entropy minimization principle and validated via a nonparametric estimation method. Images of a simulation and a real flying aircraft are used for illustration. Images of encouraging quality confirm the feasibility of ... 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.
  • Performance of a dual channel matched filter system

    Publication Year: 1999, Page(s):1429 - 1438
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (548 KB)

    We analyze the signal-to-interference plus noise ratio (SINR) performance of a dual channel matched filter system under the assumption that the input interference plus noise signal for one channel is uncorrelated with the input signal for the other channel. We develop an exact expression for the normalized SINR as a function of random variables with known distributions and then, using a Taylor ser... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Matched subspace CFAR detection of hovering helicopters

    Publication Year: 1999, Page(s):1293 - 1305
    Cited by:  Papers (37)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (824 KB)

    A constant false alarm rate (CFAR) strategy for detecting a Gaussian distributed random signal against correlated non-Gaussian clutter is developed. The proposed algorithm is based on Scharf's matched subspace detector (MSD) and has the CFAR property with respect to the clutter amplitude probability density function (apdf), provided that the clutter distribution belongs to the compound-Gaussian fa... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Dynamically adaptable m-best 2-D assignment algorithm and multilevel parallelization

    Publication Year: 1999, Page(s):1145 - 1160
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1052 KB)

    In recent years, there has been considerable interest within the tracking community in an approach to data association based on the m-best two-dimensional (2D) assignment algorithm. Much of the interest has been spurred by its ability to provide various efficient data association solutions, including joint probabilistic data association (JPDA) and multiple hypothesis tracking (MHT). The focus of t... 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