By Topic

IEEE Transactions on Aerospace and Electronic Systems

Issue 2 • April 1995

Filter Results

Displaying Results 1 - 25 of 37
  • Analysis of generalized guidance laws for homing missiles

    Publication Year: 1995, Page(s):514 - 521
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (350 KB)

    It is shown that the optimal guidance problem can be handled as a Bolza-type problem which can be solved by straightforward calculation. The solution proves to be different from that given by Yang, et al. (1989) and is verified to be a minimum performance index solution. Also presented is an alternate unified approach to the solution of the nonlinear system of differential equation of the generali... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Performance analysis of linearly combined order statistic CFAR detectors

    Publication Year: 1995, Page(s):522 - 533
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1430 KB)

    Linearly combined order statistic (LCOS) constant false-alarm rate (CFAR) detectors are examined for efficient and robust threshold estimation applied to exponentially distributed background observations for improved detection. Two optimization philosophies have been employed to determine the weighting coefficients of the order statistics. The first method optimizes the coefficients to obtain effi... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Adaptive array CFAR detection

    Publication Year: 1995, Page(s):534 - 542
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1045 KB)

    Presented here is a large class of adaptive array detection algorithms with constant false alarm rate (CFAR), so that the false alarm rate can be set to any preassigned number without knowledge of the noise covariance matrix. This class map incorporate any usual method of cell averaging and any method for array weight vector synthesis. A sufficient condition for CFAR is derived, which is easy to s... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Networks of low-Earth orbit store-and-forward satellites

    Publication Year: 1995, Page(s):543 - 554
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2308 KB)

    A slotted multiaccess protocol is proposed for networks of low-Earth orbit store-and-forward communications satellites. Networks of this type would provide communication between low cost geographically distributed Earth stations, and would be particularly attractive in areas where conventional terrestrial communications systems were not available. Applications of this type include data acquisition... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Correlated K-distributed clutter generation for radar detection and track

    Publication Year: 1995, Page(s):568 - 580
    Cited by:  Papers (36)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1737 KB)

    The generation of correlated vectors for non-Gaussian clutter is considered for log normal, Weibull, and K-probability distributions. Previous results for log normal and Weibull distributions are summarized. Expressions for the probability distributions and moments of K-distributed clutter of any correlation are derived. Procedures for forming samples of each type of clutter are shown to be equiva... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Acquisition in phase demodulation: application to ranging in radar/sonar systems

    Publication Year: 1995, Page(s):581 - 599
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3729 KB)

    Ranging in radar/sonar systems is cast as a phase/frequency detection problem. In phase/frequency demodulation, there are two stages: acquisition, which resolves the global prior uncertainty before phase/frequency locking; and tracking, which follows the phase/frequency variations. In this work, ranging corresponds to absolute phase acquisition formulated as a global nonlinear filtering problem. T... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Design and characteristics of a multiband communication satellite antenna system

    Publication Year: 1995, Page(s):600 - 607
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4674 KB)

    Feasibility studies on a multiband communication satellite antenna system and the key technologies involved in devising this system are described. The proposed multiband communication satellite utilizes four frequency bands: Ka (30/20 GHz), Ku (14/12 GHz), C (6/4 GHz), and S (2.6/2.5 GHz). It has six beam configurations, three multibeam and three shaped-beam. The following key technologies are pre... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Spatial-temporal detection of electro-optic moving targets

    Publication Year: 1995, Page(s):608 - 616
    Cited by:  Papers (21)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1275 KB)

    A maximum likelihood algorithm to detect moving targets in space-time electro-optic data is derived using a model of temporally stationary and spatially nonstationary clutter statistics. Performance is evaluated in term of the probabilities of false alarm and detection. This algorithm is applied to a variety of image sequences: visible band and infrared (IR) sensors, with terrestrial and celestial... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Asymptotically optimum radar detection in compound-Gaussian clutter

    Publication Year: 1995, Page(s):617 - 625
    Cited by:  Papers (245)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (909 KB)

    An asymptotically optimum receiver designed for detecting coherent pulse trains in compound-Gaussian clutter is introduced and assessed. The proposed receiver assumes knowledge of the structure of the clutter covariance matrix, but does not require that of its amplitude probability density function (apdf). Performance is analytically evaluated, showing that the loss, as measured with respect to th... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Analysis and prediction of regulation in a multiple-output current-mode controlled DC-to-DC converter

    Publication Year: 1995, Page(s):626 - 633
    Cited by:  Papers (1)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1488 KB)

    A technique is developed for predicting the closed-loop steady state output voltage regulation of a multiple-output current-mode controlled converter. The proposed model accounts for the current loop, the voltage loop, and the integrator in the compensation scheme. This method allows tradeoffs with respect to regulation between different components or feedback configurations to be evaluated during... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Low-harmonic three-phase inverters with nonpulsating terminal currents

    Publication Year: 1995, Page(s):634 - 646
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2134 KB)

    A basic class of three-phase inverters with nonpulsating terminal currents, namely, the four-topology four-inductor four-capacitor class is derived and studied. The expressions of duty-ratios required for low-harmonic dc-to-three-phase-ac conversion, ranges of output voltage variation, and component stresses for given specifications of inverters are derived. The characteristics of inverters includ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • CFAR detection in clutter with unknown correlation properties

    Publication Year: 1995, Page(s):647 - 657
    Cited by:  Papers (31)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (798 KB)

    We develop a constant false-alarm rate (CFAR) approach for detecting a random N-dimensional complex vector in the presence of clutter or interference modeled as a zero mean complex Gaussian vector whose correlation properties are not known to the receiver. It is assumed that estimates of the correlation properties of the clutter/interference may be obtained independently by processing the received... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Systolic robust adaptive beamforming with an adjustable constraint

    Publication Year: 1995, Page(s):658 - 669
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2755 KB)

    This paper presents a novel, fully parallel algorithm for robust linearly constrained minimum variance (LCMV) beamforming. The robustness results from the use of an adjustable constraint to compensate for the unavoidable small mismatch between the nominal and the actual steering vector of the signal-of-interest. The need for parallelism follows from the large computational demands of beamforming a... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Sequence design for IIR inverse filter pulse compression

    Publication Year: 1995, Page(s):670 - 684
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2225 KB)

    An infinite impulse response (IIR) inverse filter structure is presented, and compared with the performance of two finite impulse response (FIR) designs. The IIR design is shown to provide better performance and be able to improve further (e.g., -1.4 dB in sidelobe levels per unit delay increase for the length-13 Barker sequence) by increasing delay. The performance parameters of this IIR inverse ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Performance of DF techniques with a VHF antenna array

    Publication Year: 1995, Page(s):685 - 694
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1942 KB)

    A description of practical data processing techniques that have been used for direction finding (DF) with a real array is presented. The measured data were collected using a DF trial "test bed", which was developed at the Defence Research Establishment Ottawa (DREO) and is based on digital beamforming (DBF) technology. The system transmitters are used to simulate a complex signal environment and c... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • GPS modeling for designing aerospace vehicle navigation systems

    Publication Year: 1995, Page(s):695 - 705
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2277 KB)

    The complexity of the design of a Global Positioning System (GPS) user segment, as well as the performance demanded of the components, depends on user requirements such as total navigation accuracy. Other factors, for instance the expected satellite/vehicle geometry or the accuracy of an accompanying inertial navigation system can also affect the user segment design. Models of GPS measurements are... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An interacting multiple model approach for target tracking with glint noise

    Publication Year: 1995, Page(s):706 - 715
    Cited by:  Papers (44)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1216 KB)

    The application of the interacting multiple model (IMM) estimation approach to the problem of target tracking when the measurements are perturbed by glint noise is considered. The IMM is a very effective approach when the system has discrete uncertainties in the dynamic or measurement model as well as continuous uncertainties. It is shown that this method performs better than the "score function" ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Optimal measurement scheduling for state estimation

    Publication Year: 1995, Page(s):716 - 729
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (900 KB)

    We consider the problem of optimal allocation of measurement resources, when: (1) the total measurement budget and time duration of measurements are fixed, and (2) the cost of an individual measurement varies inversely with the (controllable) measurement accuracy. The objective is to determine the time-distribution of measurement variances that minimizes a measure of error in estimating a discrete... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Design of a modern pitch pointing control system

    Publication Year: 1995, Page(s):730 - 738
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (477 KB)

    The development of a pitch pointing control system for an advanced high performance fighter aircraft using eigenstructure assignment and command generator tracking schemes is presented. A desired eigenstructure is first chosen to achieve a desired decoupling (i.e., pitch attitude and flight path angle), and to obtain a desired damping and rise time. The command generator tracker is next used to en... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Modeling and analysis for the GPS pseudo-range observable

    Publication Year: 1995, Page(s):739 - 751
    Cited by:  Papers (28)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1981 KB)

    In this paper, a digital system for the Global Positioning System (GPS) pseudo-range observable is modeled and analyzed theoretically. The observable is measured in a GPS receiver by accurately tracking the pseudorandom noise (PRN) code phase of the input GPS signal using a digital energy detector and a digital delay lock loop (DDLL). The following issues are presented: (1) mathematical modeling o... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Poly-phase codes and optimal filters for multiple user ranging

    Publication Year: 1995, Page(s):752 - 767
    Cited by:  Papers (44)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3981 KB)

    A technique is introduced to select poly-phase codes and optimal filters of a pulse compression system that have specific temporal and frequency characteristics. In the particular problem under study, multiple vehicles are assigned unique codes and receiver filters that have nearly orthogonal signatures. Narrowband users, that act as interference, are also present within the system. A code selecti... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Star-configuration searching for satellite attitude computation

    Publication Year: 1995, Page(s):768 - 777
    Cited by:  Papers (9)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1524 KB)

    A star pattern recognition algorithm is described which recovers attitude information by processing data obtained from a modular star sensor (MOSS) mounted on a spacecraft information is obtained by matching the stars detected by the MOSS with those inside a stellar catalogue. The system performance has been evaluated both from the point of view of computation time and error probability. The effec... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Unification and comparison between two concepts of radar target angular glint

    Publication Year: 1995, Page(s):778 - 783
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1085 KB)

    This paper provides a general proof of unification between two concepts of radar target angular glint. The analysis of a two-point target model, consisting of an electrically and magnetically ideal dipole, shows the relation, difference, and equivalent condition between them more clearly. Angular glint has been synthesized from the measured data of radar echo phase, and compared with the theoretic... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Communications and radio determination system using two geostationary satellites. I. System and experiments

    Publication Year: 1995, Page(s):784 - 794
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4168 KB)

    We developed two types of hybrid terminals that can provide both satellite communication and position determination services in one system. One terminal uses the single channel per carrier (SCPC) technique and the other uses the spread spectrum (SS) technique. To evaluate the performance of the two systems, we carried out experiments in Japan and in the Pacific Ocean using two geostationary satell... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Effects of two-way decorrelation on radar detection in scintillation

    Publication Year: 1995, Page(s):795 - 804
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1014 KB)

    A 3 dB gain in average signal-to-noise ratio of a monostatic radar operating in scintillation has recently been established both theoretically and observationally. The statistics of two-way scintillation are derived here for the case where the uplink and downlink both experience Rayleigh fading and where there is arbitrary correlation between the scintillation on the two paths. These statistics ar... 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