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Aerospace and Electronic Systems, IEEE Transactions on

Issue 4 • Date July 1989

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Displaying Results 1 - 17 of 17
  • Comments on, "Improved multilevel quantization for detection of narrowband signals" by C.W. Helstrom

    Publication Year: 1989 , Page(s): 579 - 580
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (105 KB)  

    It is shown that optimum quantization levels may be obtained by using C.W. Helstrom's approach of the above named work (see ibid., vol.AES-24, p.141-147, Mar. 1988) but maximizing exact detection probabilities instead of approximations to it if the moment generating function of the test statistic can be expressed in rational form. Adaptive levels may be obtained for the quantizers by cell averagin... View full abstract»

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  • Time jitter analysis for quadrature sampling

    Publication Year: 1989 , Page(s): 473 - 482
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (672 KB)  

    Time jitter in the quadrature sampling processes is modeled and the performance of an adaptive cancellation system in the presence of such time jitter is analyzed. It is shown that the decorrelation due to time jitter depends on the magnitude of the jitter, the sampling scheme used, the bandwidth of the signal and the intermediate frequency (IF) preceding the analog-to-digital (A/D) conversion sta... View full abstract»

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  • Design of nonparametric truncated sequential detectors with parallel linear boundaries

    Publication Year: 1989 , Page(s): 483 - 490
    Cited by:  Papers (6)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (576 KB)  

    A design method is proposed for a class of nonparametric truncated sequential detectors. These detectors test nonparametric statistics against two parallel linear boundaries with an abrupt truncation at some sample size. The proposed method obtains the asymptotic relative efficiencies (ARE) of these tests with respect to their corresponding fixed-sample-size (FSS) tests in terms of some parameters... View full abstract»

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  • A 20 kHz hybrid resonant power source for the space station

    Publication Year: 1989 , Page(s): 491 - 496
    Cited by:  Papers (24)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (392 KB)  

    A hybrid resonant inverter system is presented that satisfies the steady-state operating requirements of a power source for the proposed International Space Station mobile servicing system. The steady-state behavior of the inverter was analyzed and a method is described for optimizing the design of the resonant network. The performance characteristics such as the total harmonic distortion of the o... View full abstract»

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  • Optimum local decision space partitioning for distributed detection

    Publication Year: 1989 , Page(s): 536 - 544
    Cited by:  Papers (47)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (580 KB)  

    A distributed detection system is considered that consists of a number of independent local detectors and a fusion center. The decision statistics and performance characteristics (i.e. the false alarm probabilities and detection probabilities) of the local detectors are assumed as given. Communication is assumed only between each local detector and the fusion center and is one-way from the former ... View full abstract»

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  • Analytic example of a Schweppe likelihood-ratio detector

    Publication Year: 1989 , Page(s): 545 - 558
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (748 KB)  

    A low-dimensional test problem with a known solution is used to verify various computer implementations of F.C. Schweppe's likelihood detector (1965). In this case a closed-form solution is provided for a Schweppe likelihood detector in terms of an intermediate Kalman filter, as utilized in its implementation, for detecting the presence of a two-state signal model in Gaussian white noise. The asso... View full abstract»

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  • Prefolding and zero fill in FFT processing

    Publication Year: 1989 , Page(s): 580 - 581
    Cited by:  Papers (1)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (152 KB)  

    An efficient operation applied prior to fast Fourier transform (FFT) processing is described that enables one to obtain the same spectral resolution with shorter FFTs. This so-called prefolding operation is complementary to zero fill. Both techniques are described View full abstract»

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  • Frequency estimation techniques for high dynamic trajectories

    Publication Year: 1989 , Page(s): 559 - 577
    Cited by:  Papers (25)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1092 KB)  

    A comparison is presented of four different estimation techniques applied to the problem of continuously estimating the rapidly varying parameters of a sinusoidal signal, observed in the presence of additive noise. Frequency estimates are emphasized, although phase and/or frequency rate are also estimated by some of the algorithms. These parameters are related to the velocity, position, and accele... View full abstract»

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  • A design procedure for the phase-controlled parallel-loaded resonant inverter

    Publication Year: 1989 , Page(s): 497 - 507
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (812 KB)  

    High-frequency-link power conversion and distribution based on a resonant inverter has been recently proposed. The design of several topologies is reviewed and a simple approximate design procedure is developed for the phase-controlled parallel-loaded resonant inverter. This design procedure seeks to ensure the expected benefits of resonant conversion and is verified by data from a laboratory 2.5 ... View full abstract»

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  • Duality between failure detection and radar/optical maneuver detection

    Publication Year: 1989 , Page(s): 581 - 584
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (352 KB)  

    The two distinct technical specialty areas of failure detection in stochastic dynamical systems and the detection and tracking of target maneuvers by radar or optics are identified as two separate disciplines that have achieved results by using modeling techniques. These techniques can be cross-applied to the other specialty area, which is revealed to have in common the same underlying mathematica... View full abstract»

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  • A comparison of smoothing approaches for angle measurement

    Publication Year: 1989 , Page(s): 529 - 535
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (560 KB)  

    For high-resolution active direction finding of completely correlated targets, one can use two approaches, i.e. frequency-domain smoothing and non-frequency-domain smoothing, such as spatial smoothing, or a multidimensional search of signal-subspace. A performance comparison of the two approaches is presented for the fluctuating target cases under an equal transmitted-energy constraint. both theor... View full abstract»

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  • Generalized model of brushless DC generator

    Publication Year: 1989 , Page(s): 508 - 519
    Cited by:  Papers (6)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (668 KB)  

    A generalized model is described for a brushless DC machine consisting of a multiphase synchronous machine with a full-wave bridge rectifier connected to its output terminals. The state-variable equations for the machine are suitable for numerical integration on a digital computer, and are assembled in a form which permits investigations to be made on the effects of different numbers of armature p... View full abstract»

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  • A unifying approach to multitarget tracking

    Publication Year: 1989 , Page(s): 520 - 528
    Cited by:  Papers (8)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (588 KB)  

    A description is given of a global modeling approach developed for the multitarget tracking (MTT) problem. From a global modeling of this problem, both data association (DA) and maneuver estimation problems can be simultaneously solved using system identification techniques. With this approach, previously developed single-target tracking/acceleration estimation techniques can be directly used for ... View full abstract»

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  • Algorithmic, architectural, and beam pattern issues of sidelobe cancellation

    Publication Year: 1989 , Page(s): 459 - 472
    Cited by:  Papers (8)  |  Patents (4)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (880 KB)  

    Various important issues concerning the sidelobe cancellation (SLC) approach for suppressing sidelobe interference signals in radar are investigated. The concepts are presented in a tutorial manner and include: formulating the calculation of the complex weights for the auxiliary channels as an exact least-squares (LS) problem; computing the LS weights using orthogonal transformation for improved n... View full abstract»

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  • Analysis of parallel resonant converter operating above resonance

    Publication Year: 1989 , Page(s): 449 - 458
    Cited by:  Papers (19)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (552 KB)  

    A high-frequency DC-DC converter using a parallel resonant inverter operating above resonance is analyzed using a state-space approach and a constant current model. Closed-form solutions are obtained under steady-state conditions. The analysis shows that with some changes most equations are of the same form as those corresponding to operations below resonance. The analysis is also used to obtain t... View full abstract»

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  • An extended Frank code and new technique for implementing P3 and P4 codes

    Publication Year: 1989 , Page(s): 442 - 448
    Cited by:  Papers (4)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (420 KB)  

    A method is presented for generating a class of polyphase pulse compression codes of length other than N2 using an efficient digital implementation technique. The structure, called extended Frank (EF) code, can be applied to linear frequency-modulation waveforms for compression ratios of N×M where N and M are arbitrary integers. The pha... View full abstract»

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  • An exact expression for resolution cell area in special case of bistatic radar systems

    Publication Year: 1989 , Page(s): 584 - 587
    Cited by:  Papers (7)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (220 KB)  

    An exact expression for the bistatic resolution-cell area (A B) is developed for the special case in which either the transmit or receive antenna has a broad azimuth beamwidth or is omnidirectional. Quantitative examples are presented to illustrate the variation of AB with location. A comparison is made with the performance of a commonly used approximation f... 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