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Aerospace and Electronic Systems, IEEE Transactions on

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
    Save to Project icon | Request Permissions | 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
    Save to Project icon | Request Permissions | PDF file iconPDF (23 KB)  
    Freely Available from IEEE
  • Doppler ambiguity resolution using optimal multiple pulse repetition frequencies

    Publication Year: 1999 , Page(s): 371 - 379
    Cited by:  Papers (4)  |  Patents (1)
    Save to Project icon | Request Permissions | 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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  • Two-dimensional adaptive array for spatially separating and tracking uncorrelated sources

    Publication Year: 1999 , Page(s): 93 - 101
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | 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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  • Super resolution time delay estimation via MODE-WRELAX

    Publication Year: 1999 , Page(s): 294 - 307
    Cited by:  Papers (11)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1188 KB)  

    We consider estimating time delays and amplitudes (real- or complex-valued) from the superposition of very closely spaced signals with known shapes. The well-known high resolution MODE (Method Of Direction Estimation) algorithm, which was originally proposed for angle estimation in array processing, is modified and used with our efficient time delay estimation method WRELAX (Weighted Fourier trans... 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 (33)
    Save to Project icon | Request Permissions | 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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  • Radar synthetic vision system for adverse weather aircraft landing

    Publication Year: 1999 , Page(s): 2 - 14
    Cited by:  Papers (7)  |  Patents (4)
    Save to Project icon | Request Permissions | 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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  • SAR imaging of moving targets

    Publication Year: 1999 , Page(s): 188 - 200
    Cited by:  Papers (131)  |  Patents (11)
    Save to Project icon | Request Permissions | 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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  • Efficient recursive state estimator for dynamic systems without knowledge of noise covariances

    Publication Year: 1999 , Page(s): 102 - 114
    Cited by:  Papers (15)
    Save to Project icon | Request Permissions | 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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  • Position fix from three GPS satellites and altitude: a direct method

    Publication Year: 1999 , Page(s): 350 - 354
    Cited by:  Papers (8)  |  Patents (5)
    Save to Project icon | Request Permissions | 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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  • Design and comparison of mode-set adaptive IMM algorithms for maneuvering target tracking

    Publication Year: 1999 , Page(s): 343 - 350
    Cited by:  Papers (24)  |  Patents (3)
    Save to Project icon | Request Permissions | 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 detection of small stochastic signals

    Publication Year: 1999 , Page(s): 15 - 30
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | 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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  • Phase quantized SAR signal processing: theory and experiments

    Publication Year: 1999 , Page(s): 201 - 214
    Cited by:  Papers (11)
    Save to Project icon | Request Permissions | 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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  • Transmitter model for the design of communication satellites

    Publication Year: 1999 , Page(s): 31 - 42
    Save to Project icon | Request Permissions | 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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  • Optimization of multiframe target detection schemes

    Publication Year: 1999 , Page(s): 176 - 187
    Cited by:  Papers (20)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (988 KB)  

    We optimize the performance of multiframe target detection (MFTD) schemes under extended Neyman-Pearson (NP) criteria. Beyond the per-track detection performance for a specific target path in conventional MFTD studies, we optimize the overall detection performance which is averaged over all the potential target paths. It is shown that the overall MFTD performance is limited by the mobility of a ta... View full abstract»

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  • Multiparametric importance sampling for simulation of radar systems

    Publication Year: 1999 , Page(s): 123 - 137
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1136 KB)  

    The performances of the importance sampling (IS) techniques are improved by using multiparametric distortions of the input random processes. The analysis of different constant false-alarm rate (CFAR) algorithms confirms the usefulness of this method. The potential of this new approach is fully exploited if optimization techniques are used to obtain the optimum distortions and to avoid bias in the ... View full abstract»

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  • Kalman filtering approach to multispectral/hyperspectral image classification

    Publication Year: 1999 , Page(s): 319 - 330
    Cited by:  Papers (2)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1480 KB)  

    Linear unmixing is a widely used remote sensing image processing technique for subpixel classification and detection where a scene pixel is generally modeled by a linear mixture of spectral signatures of materials present within the pixel. An approach, called linear unmixing Kalman filtering (LUKF), is presented, which incorporates the concept of linear unmixing into Kalman filtering so as to achi... View full abstract»

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  • Theoretical analysis of the sequential lobing technique

    Publication Year: 1999 , Page(s): 282 - 293
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (680 KB)  

    A theoretical analysis of the sequential lobing technique for target angle tracking is presented. The signal power received by each antenna beam is assumed to pass through a logarithmic amplifier. A rigorous statistical approach is adopted in the analysis for both non-fluctuating and fluctuating targets. Closed form expressions are derived for the normalized mean error and rms error of the angle e... View full abstract»

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  • Adaptive control and stabilization of elastic spacecraft

    Publication Year: 1999 , Page(s): 115 - 122
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (660 KB)  

    This work treats the question of large angle rotational maneuver and stabilization of an elastic spacecraft (spacecraft-beam-tip body configuration). It is assumed that the parameters of the system are completely unknown. An adaptive control law is derived for the rotational maneuver of the spacecraft. Using the adaptive controller, asymptotically decoupled control of the pitch angle of the space ... 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 (2)
    Save to Project icon | Request Permissions | 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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  • High resolution radar clutter statistics

    Publication Year: 1999 , Page(s): 43 - 60
    Cited by:  Papers (50)
    Save to Project icon | Request Permissions | 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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  • Radar processing gain improvement over frequency using the discrete wavelet transform

    Publication Year: 1999 , Page(s): 363 - 368
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | 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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  • Hybrid high frequency AC power distribution architecture for telecommunication systems

    Publication Year: 1999 , Page(s): 138 - 147
    Cited by:  Papers (13)  |  Patents (1)
    Save to Project icon | Request Permissions | 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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  • Design and analysis of a regulated peak-power tracking system

    Publication Year: 1999 , Page(s): 84 - 92
    Cited by:  Papers (6)  |  Patents (1)
    Save to Project icon | Request Permissions | 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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  • Multiple-model estimation with variable structure. IV. Design and evaluation of model-group switching algorithm

    Publication Year: 1999 , Page(s): 242 - 254
    Cited by:  Papers (20)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1204 KB)  

    For pt. III see ibid., vol. 35, pp. 225-41 (1999). A variable-structure multiple-model (VSMM) estimator, called model-group switching (MGS) algorithm, has been presented in Part III, which is the first VSMM estimator that is generally applicable to a large class of problem with hybrid (continuous and discrete) uncertainties. In this algorithm, the model-set is made adaptive by switching among a nu... 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