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Aerospace and Electronic Systems, IEEE Transactions on

Issue 4 • Date Oct. 1997

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Displaying Results 1 - 25 of 27
  • A jerk model for tracking highly maneuvering targets

    Publication Year: 1997 , Page(s): 1094 - 1105
    Cited by:  Papers (39)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1082 KB)  

    A model of target motion in three-dimensional space that includes position derivatives up to the third order is developed. Compared with available models, which include terms at the most up to the second derivative, the model introduced in this work, called the jerk model, can more accurately describe agile target maneuvers which are likely to contain significant higher order derivatives. A compat... View full abstract»

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  • Distributed decision fusion using empirical estimation

    Publication Year: 1997 , Page(s): 1106 - 1114
    Cited by:  Papers (9)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (602 KB)  

    The problem of optimal data fusion in multiple detection systems is studied in the case where training examples are available, but no a priori information is available about the probability distributions of errors committed by the individual detectors. Earlier solutions to this problem require some knowledge of the error distributions of the detectors, for example, either in a parametric form or i... View full abstract»

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  • Step load response of a current-mode-controlled DC-to-DC converter

    Publication Year: 1997 , Page(s): 1115 - 1121
    Cited by:  Papers (31)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (841 KB)  

    This paper analyzes the step load response of a current-mode-controlled pulsewidth modulation (PWM) converter and also presents design guidelines for obtaining a good step load response. Analytical expressions for the step load response are derived in terms of the power stage and feedback compensation parameters. Control design to minimize the overshoot and settling time of the output voltage is p... View full abstract»

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  • Control of a large space structure using MMAE/MMAC techniques

    Publication Year: 1997 , Page(s): 1122 - 1131
    Cited by:  Papers (11)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1142 KB)  

    The application of moving-bank multiple model adaptive estimation and control (MMAE/MMAC) algorithms to an actual spade structure (Space Integrated Controls Experiment (SPICE)) being examined at Phillips Laboratory at Kirtland AFB, NM, is presented. The structure consists of a large platform and a smaller platform connected by three legs in a tripod fashion. Kalman filtering and LQG (linear system... View full abstract»

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  • A novel power electronics bidirectional interface

    Publication Year: 1997 , Page(s): 1132 - 1141
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (4741 KB)  

    A novel three-phase bidirectional interface using only four power semiconductor switches to simplify the hardware circuit is analyzed and designed. An accurate simulation model is proposed for convenient simulation using common PC software tools. A critical inductance condition is derived for successful current tracking. The capacity to generate maximum active power is also estimated. A systematic... View full abstract»

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  • RFI suppression for ultra wideband radar

    Publication Year: 1997 , Page(s): 1142 - 1156
    Cited by:  Papers (42)  |  Patents (12)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2956 KB)  

    An estimate-and-subtract algorithm is presented for the real-time digital suppression of radio frequency interference (RFI) in ultrawideband (UWB) synthetic aperture radar (SAR) systems used for foliage- and ground-penetrating imaging. The algorithm separately processes fixed- and variable-frequency interferers. Excision of estimated targets greatly reduces bias in RFI estimates, thereby reducing ... View full abstract»

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  • A multiresolution approach to discrimination in SAR imagery

    Publication Year: 1997 , Page(s): 1157 - 1169
    Cited by:  Papers (20)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (4845 KB)  

    We develop and test a new algorithm for discriminating man-made objects from natural clutter in synthetic-aperture radar (SAR) imagery. This algorithm exploits characteristic variations in speckle pattern as image resolution is varied from course to fine. We model these variations as an autoregression in scale, and then use the autoregressive model to define a multiresolution log-likelihood ratio ... View full abstract»

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  • Eigenanalysis-based space-time adaptive radar: performance analysis

    Publication Year: 1997 , Page(s): 1170 - 1179
    Cited by:  Papers (19)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1207 KB)  

    The space-time radar problem is well suited to the application of techniques that take advantage of the low rank property of the space-time covariance matrix. The performance of an eigenanalysis-based detector with respect to convergence rate and robustness to calibration errors is analyzed. Analytical expressions are developed for receiver operating curves when the clutter signal environment is a... View full abstract»

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  • Waveform selective probabilistic data association

    Publication Year: 1997 , Page(s): 1180 - 1188
    Cited by:  Papers (53)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1397 KB)  

    An adaptive, waveform selective probabilistic data association (WSPDA) algorithm for tracking a single target in clutter is presented. The assumption of an optimal receiver allows the inclusion of transmitted waveform specification parameters in the tracking subsystem equations, leading to a waveform selection scheme where the next transmitted waveform parameters are selected so as to minimize the... View full abstract»

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  • Performance limits for processor networks with divisible jobs

    Publication Year: 1997 , Page(s): 1189 - 1198
    Cited by:  Papers (6)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2067 KB)  

    Ultimate performance limits to the aggregate processing speed of networks of processors that are processing a divisible job are described. These take the form of either closed-form expressions or numerical procedures to calculate the equivalent processing speed of an infinite number of processors. These processors are interconnected in either a linear daisy chain with load origination from the net... View full abstract»

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  • Efficient ATR using compression

    Publication Year: 1997 , Page(s): 1199 - 1211
    Cited by:  Papers (6)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2906 KB)  

    We examine various model-based automatic target recognition (MBATR) classifiers to investigate the utility of model-catalog compression realized via signal-vector quantization (VQ) and feature extraction. We specifically investigate the impact of various compression rates and common automatic target recognition (ATR) scenario variations such as noise and occlusion through simulations on high-range... View full abstract»

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  • Canonical transform for tracking with kinematic models

    Publication Year: 1997 , Page(s): 1212 - 1224
    Cited by:  Papers (11)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (782 KB)  

    A canonical transform is presented that converts a coupled or uncoupled kinematic model for target tracking into a decoupled dimensionless canonical form. The coupling is due to non-zero off-diagonal terms in the covariance matrices of the process noise and/or the measurement noise, which can be used to model the coupling of motion and/or measurement between coordinates. The decoupled dimensionles... View full abstract»

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  • Analysis of a signal starting time estimator based on the Page test statistic

    Publication Year: 1997 , Page(s): 1225 - 1234
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1007 KB)  

    Many signal processing applications require the detection of an abrupt change with subsequent estimation of the actual time of occurrence of the change. The time of the most recent reset to zero of the Page test statistic is proposed for this purpose. The probability mass function of the estimator is determined analytically subject to a quantization of the Page test statistic update. Closed-form r... View full abstract»

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  • Optical fiber geostationary tether satellite (F-GTS) system design

    Publication Year: 1997 , Page(s): 1235 - 1241
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1081 KB)  

    The geostationary satellite orbit (GSO) is a limited natural resource and its efficient utilization is very important. The geostationary tether satellite (GTS) system has a number of satellites aligned along the local vertical on either side of the nominal geostationary position. The system is synchronized with the Earth's rotation and all the various altitudes are geostationary, Furthermore, opti... View full abstract»

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  • A formulation of multitarget tracking as an incomplete data problem

    Publication Year: 1997 , Page(s): 1242 - 1257
    Cited by:  Papers (56)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2440 KB)  

    Traditional multihypothesis tracking methods rely upon an enumeration of all the assignments of measurements to tracks. Pruning and gating are used to retain only the most likely hypotheses in order to drastically limit the set of feasible associations. The main risk is to eliminate correct measurement sequences. The probabilistic multiple hypothesis tracking (PMHT) method has been developed by St... View full abstract»

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  • A new power collection architecture for future spacecraft

    Publication Year: 1997 , Page(s): 1258 - 1270
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2272 KB)  

    The generalized tree-like transmission line network system having n layers in total with m-to-1 branch connection at each joint (T-TLNS-n-m) is proposed to replace the traditional series-parallel combined dc networks to automatically accumulate identically distributed power cells into the large amount of useful power for the spacecrafts. The proposed system has the attractive features of simple st... View full abstract»

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  • On optimal track-to-track fusion

    Publication Year: 1997 , Page(s): 1271 - 1276
    Cited by:  Papers (98)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1736 KB)  

    Track-to-track fusion is an important part in multisensor fusion. Much research has been done in this area. Chong et al. (1979, 1986, 1990) among others, presented an optimal fusion formula under an arbitrary communication pattern. This formula is optimal when the underlying systems are deterministic, i.e., the process noise is zero, or when full-rate communication (two sensors exchange informatio... View full abstract»

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  • Finite-dimensional filters with nonlinear drift. III: Duncan-Mortensen-Zakai equation with arbitrary initial condition for the linear filtering system and the Benes filtering system

    Publication Year: 1997 , Page(s): 1277 - 1294
    Cited by:  Papers (15)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1289 KB)  

    We consider the Duncan-Mortensen-Zakai (DMZ) equation for the Kalman-Bucy filtering system and Benes filtering system. We show that this equation can be solved explicitly with an arbitrary initial condition by solving a system of ordinary differential equations and a Kolmogorov-type equation, Let n be the dimension of state space. We show that we need only n sufficient statistics in order to solve... View full abstract»

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  • Finite-dimensional filters with nonlinear drift. V: solution to Kolmogorov equation arising from linear filtering with non-Gaussian initial condition

    Publication Year: 1997 , Page(s): 1295 - 1308
    Cited by:  Papers (6)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1824 KB)  

    Despite its usefulness, the Kalman-Bucy filter is not perfect. One of its weaknesses is that it needs a Gaussian assumption on the initial data. Recently Yau and Yau introduced a new direct method to solve the estimation problem for linear filtering with non-Gaussian initial data. They factored the problem into two parts: (1) the on-line solution of a finite system of ordinary differential equatio... View full abstract»

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  • Theory of partially adaptive radar

    Publication Year: 1997 , Page(s): 1309 - 1325
    Cited by:  Papers (71)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (4665 KB)  

    This work extends the recently introduced cross-spectral metric for subspace selection and dimensionality reduction to partially adaptive space-time sensor array processing. A general methodology is developed for the analysis of reduced-dimension detection tests with known and unknown covariance. It is demonstrated that the cross-spectral metric results in a low-dimensional detector which provides... View full abstract»

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  • Reduced-order H and L2-L filtering via linear matrix inequalities

    Publication Year: 1997 , Page(s): 1326 - 1338
    Cited by:  Papers (86)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1095 KB)  

    Necessary and sufficient conditions are derived for the existence of a solution to the continuous-time and discrete-time reduced-order H and L2-L filtering problems. These conditions are expressed in terms of linear matrix inequalities (LMIs) and a coupling nonconvex matrix rank constraint. Convex LMI problems are obtained for the full-order and the z... View full abstract»

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  • CLOS+IRTH composite guidance

    Publication Year: 1997 , Page(s): 1339 - 1344
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1308 KB)  

    A composite guidance scheme based on the command to line-of-sight (CLOS)+infrared terminal homing (IRTH) for a short-range surface-to-air missile system is proposed in an attempt to complement drawbacks of a single guidance law. Launch boundaries for a successful guidance handover are analyzed according to missile maneuverability and seeker gimbal angle limits. This paper also concentrates on deve... View full abstract»

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  • Probability distribution of complex monopulse ratio with arbitrary correlation between channels

    Publication Year: 1997 , Page(s): 1345 - 1350
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (186 KB)  

    The joint distribution of the real and imaginary parts of the monopulse ratio (MR) is obtained for a monopulse radar with arbitrarily correlated Gaussian noise and non-zero means in the sum and difference channels. The general result is used to consider thresholding and to develop the marginal density for the real part of the MR for the special case of real correlation between the channels. View full abstract»

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  • Upgrading conical scan with off-boresight measurements

    Publication Year: 1997 , Page(s): 1350 - 1357
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (279 KB)  

    Adding off-boresight measurements to a conical scan radar can bring the angle accuracy closer to the theoretical attainable limit. A model for off-boresight measurement implementation and its performances are discussed. The expected accuracy is calculated and compared with the Cramer-Rao bound. The model is also used to determine bias error induced by the target dynamics. View full abstract»

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  • Correction to data in January 1997 editorial

    Publication Year: 1997 , Page(s): 1363
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (55 KB)  

    First Page of the Article
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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