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IEEE Transactions on Aerospace and Electronic Systems

Issue 3 • Date Jul 2002

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Displaying Results 1 - 25 of 34
  • Update with out-of-sequence measurements in tracking: exact solution

    Publication Year: 2002, Page(s):769 - 777
    Cited by:  Papers (141)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (598 KB) | HTML iconHTML

    In target tracking systems measurements are typically collected in "scans" or "frames" and then they are transmitted to a processing center. In multisensor tracking systems that operate in a centralized manner, there are usually different time delays in transmitting the scans or frames from the various sensors to the center. This can lead to situations where measurements from the same target arriv... View full abstract»

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  • Incremental motion control of linear synchronous motor

    Publication Year: 2002, Page(s):1011 - 1022
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (696 KB) | HTML iconHTML

    In this study a particular incremental motion control problem, which is specified by the trapezoidal velocity profile using multisegment sliding mode control (MSSMC), is proposed to control a permanent magnet linear synchronous motor (PMLSM) servo drive system. First, the structure and operating principle of the PMLSM are described in detail. Second, a field-oriented control PMLSM servo drive is i... View full abstract»

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  • Outlier resistant adaptive matched filtering

    Publication Year: 2002, Page(s):885 - 901
    Cited by:  Papers (50)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (899 KB) | HTML iconHTML

    Robust adaptive matched filtering (AMF) whereby outlier data vectors are censored from the covariance matrix estimate is considered in a maximum likelihood estimation (MLE) setting. It is known that outlier data vectors whose steering vector is highly correlated with the desired steering vector, can significantly degrade the performance of AMF algorithms such as sample matrix inversion (SMI) or fa... View full abstract»

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  • Gating techniques for maneuvering target tracking in clutter

    Publication Year: 2002, Page(s):1087 - 1097
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (611 KB) | HTML iconHTML

    Gating techniques for maneuvering target tracking using an IMM-PDA filter are considered in this paper. Existing gating techniques, namely, centralized gating and model based gating are reviewed and new gating techniques, called model probability weighted gating and two-stage model probability weighted gating, are proposed. A benchmark trajectory and a random scenario are considered for performanc... View full abstract»

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  • Novel single-phase AC/DC converter with two PWM control schemes

    Publication Year: 2002, Page(s):1000 - 1010
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (653 KB) | HTML iconHTML

    A novel single-phase AC/DC converter with two pulsewidth modulation (PWM) schemes is proposed to draw a sinusoidal line current with nearly unity power factor, achieve balanced neutral point voltage and regulate the DC bus voltage. With the aid of neutral point clamped scheme, a three-level voltage pattern is generated on the AC side of the proposed rectifier. To track the tine current command der... View full abstract»

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  • Angular mean and variance for selected two-source radar-target combinations

    Publication Year: 2002, Page(s):1038 - 1046
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (579 KB) | HTML iconHTML

    Angle tracking of the desired target in the presence of interference is a common radar problem. It can occur when the desired target is competing with a jammer, clutter, or multipath. Angle statistics can vary significantly for a tracking radar depending upon the nature of this interference. The angular mean and variance are presented for three different statistical two-target types for single and... View full abstract»

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  • Tracking multiple objects with particle filtering

    Publication Year: 2002, Page(s):791 - 812
    Cited by:  Papers (157)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1108 KB) | HTML iconHTML

    We address the problem of multitarget tracking (MTT) encountered in many situations in signal or image processing. We consider stochastic dynamic systems detected by observation processes. The difficulty lies in the fact that the estimation of the states requires the assignment of the observations to the multiple targets. We propose an extension of the classical particle filter where the stochasti... View full abstract»

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  • DOA estimation using one-bit quantized measurements

    Publication Year: 2002, Page(s):868 - 884
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (951 KB) | HTML iconHTML

    The effects 1-bit quantization of the input samples has on the direction-of-arrival (DOA) estimation accuracy are considered. The signal model assumes a single stochastic Gaussian point source that is embedded in white Gaussian noise (WGN). The inherent limitations governed by the extreme clipping of the input data are analyzed using the Cramer-Rao bound (CRB) that is derived for a two-sensor arra... View full abstract»

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  • Characterizing performance of α-β-γ filters

    Publication Year: 2002, Page(s):1072 - 1087
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (847 KB) | HTML iconHTML

    The α-β-γ filter, a sampled data target tracker which can asymptotically track a constant acceleration target, is discussed in detail. The α,β,γ parameters are studied to characterize the stability of the filter and its performance viz its transient behavior. A closed-form equation for the mean square response of the system to white noise is derived. In addition, ... View full abstract»

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  • Moving horizon Nash strategies for a military air operation

    Publication Year: 2002, Page(s):989 - 999
    Cited by:  Papers (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (716 KB) | HTML iconHTML

    Dynamic game theory has recently received considerable attention as a possible technology for formulating control actions for decision makers in an extended complex enterprise that involves an adversary. Examples of such enterprises are very common in military operations. Enterprises of this type are typically modeled by a highly nonlinear discrete time dynamic system whose state is controlled by ... View full abstract»

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  • Multiple model adaptive estimation with filter spawning

    Publication Year: 2002, Page(s):755 - 768
    Cited by:  Papers (24)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (878 KB) | HTML iconHTML

    Multiple model adaptive estimation (MMAE) with filter spawning is used to detect and estimate partial actuator failures on the VISTA F-16. The truth model is a full six-degree-of-freedom simulation provided by Calspan and General Dynamics. The design models are chosen as 13-state linearized models, including first order actuator models. Actuator failures are incorporated into the truth model and d... View full abstract»

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  • Multipath and ground clutter analysis for a UWB noise radar

    Publication Year: 2002, Page(s):838 - 853
    Cited by:  Papers (8)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (870 KB) | HTML iconHTML

    An ultrawideband (UWB) random-noise radar operating in the 1-2 GHz frequency band has been developed and field-tested up to a 200 m range at the Environmental Remote Sensing Laboratory (ERSL) of the University of Nebraska. A unique heterodyne correlation technique based on a delayed transmitted waveform using a photonic delay line has been used to inject coherence within this system. The performan... View full abstract»

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  • Horizontal waypoint guidance design using optimal control

    Publication Year: 2002, Page(s):1116 - 1120
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB) | HTML iconHTML

    A horizontal waypoint guidance algorithm is proposed by applying line-following guidance to waypoint line segments in sequence. The line-following guidance is designed using an LQR (linear quadratic regulator). Then, the optimal waypoint changing points are derived by minimizing the accelerations required for changing the waypoint line segments. Also derived is a sufficient condition for the stabi... View full abstract»

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  • MATLAB code for plotting ambiguity functions

    Publication Year: 2002, Page(s):1064 - 1068
    Cited by:  Papers (8)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (349 KB) | HTML iconHTML

    A MATLAB code capable of plotting ambiguity functions of many different radar signals is presented. The program makes use of MATLAB's sparse matrix operations, and avoids loops. The program could be useful as a pedagogical tool in radar courses teaching pulse compression. View full abstract»

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  • Feedforward maximum power point tracking of PV systems using fuzzy controller

    Publication Year: 2002, Page(s):969 - 981
    Cited by:  Papers (64)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (740 KB) | HTML iconHTML

    A feedforward maximum power (MP) point tracking scheme is developed for the interleaved dual boost (IDB) converter fed photovoltaic (PV) system using fuzzy controller. The tracking algorithm changes the duty ratio of the converter such that the solar cell array (SCA) voltage equals the voltage corresponding to the MP point at that solar insolation. This is done by the feedforward loop, which gener... View full abstract»

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  • Sidelobe blanking with integration and target fluctuation

    Publication Year: 2002, Page(s):1023 - 1037
    Cited by:  Papers (16)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (726 KB) | HTML iconHTML

    In radar systems, sidelobe blanking (SLB) is used to mitigate impulsive interference that enters the radar through sidelobes of the main antenna. SLB employs an auxiliary antenna channel with the output being compared with that of the main antenna channel and a decision is then made as to whether or not to blank the main channel output. SLB performance determination involves the evaluation of seve... View full abstract»

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  • Routing in networks of intersatellite links

    Publication Year: 2002, Page(s):902 - 917
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1077 KB) | HTML iconHTML

    How to characterize and implement point-to-point (i.e., unicast) routing algorithms is discussed. The characteristics of routing algorithms are first described as well as the specificities of routing in constellations of nongeostationary (NGO) satellites equipped with intersatellite links (ISLs). Then, some of the candidate algorithms displaying the characteristics identified before are simulated ... View full abstract»

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  • Recursive state estimation for multiple switching models with unknown transition probabilities

    Publication Year: 2002, Page(s):1098 - 1104
    Cited by:  Papers (21)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (451 KB) | HTML iconHTML

    This work considers hybrid systems with continuous-valued target states and discrete-valued regime variable. The changes (switches) of the regime variable are modeled by a finite state Markov chain with unknown and random transition probabilities following Dirichlet distributions. Our work analytically derives the marginal posterior distribution of the states and regime variables, the transition p... View full abstract»

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  • Passive tracking scheme for a single stationary observer

    Publication Year: 2002, Page(s):1046 - 1054
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (528 KB) | HTML iconHTML

    While there are many techniques for bearings-only tracking (BOT) in the ocean environment, they do not apply directly to the land situation. Generally, for tactical reasons, the land observer platform is stationary; but, it has two sensors, visible and infrared, for measuring bearings and a laser range finder (LRF) for measuring range. There is a requirement to develop a new BOT data fusion scheme... View full abstract»

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  • Brightness-independent start-up routine for star trackers

    Publication Year: 2002, Page(s):813 - 823
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (774 KB) | HTML iconHTML

    Initial attitude acquisition by a modern star tracker is investigated here. Criteria for efficient organization of the on-board database are discussed with reference to a brightness-independent initial acquisition algorithm. Star catalog generation preprocessing is described, with emphasis on the identification of minimum star brightness for detection by a sensor based on a charge coupled device (... View full abstract»

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  • Predicting and adapting satellite channels with weather-induced impairments

    Publication Year: 2002, Page(s):779 - 790
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (723 KB) | HTML iconHTML

    Efficiency improvements using predictive and adaptive methods over satellite channels with weather-induced impairments are presented. Scintillation and rain attenuation are the two dominant factors for signal fading over satellite-Earth paths at operating frequencies over 10 GHz. We develop statistical and spectral analyses of these processes, and obtain simple linear predictors for received signa... View full abstract»

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  • Tracking a ballistic target: comparison of several nonlinear filters

    Publication Year: 2002, Page(s):854 - 867
    Cited by:  Papers (119)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (739 KB) | HTML iconHTML

    This paper studies the problem of tracking a ballistic object in the reentry phase by processing radar measurements. A suitable (highly nonlinear) model of target motion is developed and the theoretical Cramer-Rao lower bounds (CRLB) of estimation error are derived. The estimation performance (error mean and standard deviation; consistency test) of the following nonlinear filters is compared: the ... View full abstract»

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  • Doppler compensation for binary phase-coded waveforms

    Publication Year: 2002, Page(s):1068 - 1072
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (379 KB) | HTML iconHTML

    Codes used in phase-coded pulse compression waveforms suffer from Doppler mismatch. Based on an analysis of the effects of Doppler mismatch on binary phase-coded waveforms, a class of codes is proposed (hereafter referred to as the component codes), its derivation and processing is described, and the performance results are analyzed. This technique solves the problem of the Doppler mismatch of bin... View full abstract»

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  • Micromachined gas flow regulator for ion propulsion systems

    Publication Year: 2002, Page(s):982 - 988
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (582 KB) | HTML iconHTML

    A gas flow regulator for ion propulsion systems on board small satellites is proposed. The device is fabricated by means of micromachining techniques and is made up of a silicon die and a borosilicate glass cover joined together by means of anodic bonding. The fabrication process of two different versions of the device is described. The gas mass flow dependence on both the inlet pressure and the a... View full abstract»

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  • Robust wavelet neuro control for linear brushless motors

    Publication Year: 2002, Page(s):918 - 932
    Cited by:  Papers (37)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (849 KB) | HTML iconHTML

    Design, simulation and experimental implementation of a wavelet basis function network learning controller for linear brushless dc motors (LBDCM) are considered. Stability robustness with position tracking is the primary concern. The proposed controller deals mainly with external disturbances, e.g. nonlinear friction force and payload variation in motion control of linear motors. It consists of tw... 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. 

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Meet Our Editors

Editor-in-Chief
Lance Kaplan
Army Research Laboratory