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IEEE Transactions on Aerospace and Electronic Systems

Issue 4 • Date Oct. 1996

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Displaying Results 1 - 25 of 33
  • 1996 Index IEEE Transactions on Aerospace and Electronic Systems Vol. 32

    Publication Year: 1996
    Request permission for commercial reuse | PDF file iconPDF (3306 KB)
    Freely Available from IEEE
  • On the false alarm probability for an overlapped FFT processor

    Publication Year: 1996, Page(s):1452 - 1456
    Cited by:  Papers (27)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    A standard processor for detecting narrowband signals in noise applies the fast Fourier transform (FFT) to overlapped data blocks, and then sums the squared magnitudes of the bins from successive FFTs. The overlap of the data blocks causes these bins to be correlated, even when the noise is white. A simple expression is derived for the probability of false alarm when the covariance matrix of the F... View full abstract»

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  • Synthesis and analysis of inductor-isolated switched-mode converter

    Publication Year: 1996, Page(s):1228 - 1238
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1120 KB)

    A procedure is developed for the synthesis and analysis of complete classes of inductor-isolated PWM (pulse width-modulated) converters. The procedure is useful in the identification of converters in which the isolation inductors can be integrated with the rest of the inductors on the same magnetic structures. The information obtained from the procedure is useful in the selection of the converter ... View full abstract»

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  • Peformance of dynamic programming techniques for Track-Before-Detect

    Publication Year: 1996, Page(s):1440 - 1451
    Cited by:  Papers (97)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (988 KB)

    “Track-Before-Detect” (TBD) is a target tracking technique where no threshold is applied at each measurement frame. Instead, data are processed over a number of frames before decisions on target existence are made. The track is returned simultaneously with the detection. A simple algorithm is presented and demonstrated via simulations. A detailed analysis enables detection and tracking... View full abstract»

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  • Improved tracking of maneuvering targets: The use of turn-rate distributions for acceleration modeling

    Publication Year: 1996, Page(s):1355 - 1361
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (488 KB)

    Tactically maneuvering targets are difficult to track since acceleration cannot be observed directly and the accelerations are induced by human control or an autonomous guidance system therefore they are not subject to deterministic models. A common tracking system is the two-state Kalman filter with a Singer maneuver model where the second-order statistics of acceleration is the same as a first-o... View full abstract»

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  • Observability of target tracking with bearings-only measurements

    Publication Year: 1996, Page(s):1468 - 1472
    Cited by:  Papers (62)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (380 KB)

    Observability requirements are obtained for three-dimensional maneuvering target tracking with bearings-only measurements. The approach taken here using pseudomeasurements is completely different from the previous work in this area in that it does not involve solutions of nonlinear differential equations resulting from complicated time differentiations and it can treat a more general class of targ... View full abstract»

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  • Digital redesign for controlling the chaotic Chua's circuit

    Publication Year: 1996, Page(s):1488 - 1500
    Cited by:  Papers (27)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (960 KB)

    We apply some successful digital redesign techniques, developed previously for the control of linear system, to controlling the nonlinear chaotic Chua's circuit. Chua's circuit is a simple autonomous physical device that exhibits very rich and complex nonlinear dynamics of bifurcation and chaos, and is hence very sensitive to digital controls. To apply advanced high-speed computer technology to th... View full abstract»

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  • Current ripple bounds of interleaved power converters

    Publication Year: 1996, Page(s):1505 - 1508
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (256 KB)

    We extend the main claims for more general waveforms. Specifically, we show that for any power converter module, if its input/output current ripple waveform is of full-sinusoidal-type or half-sinusoidal-type with peak-to-peak amplitude A(ΔI0), then the amplitude of the input/output current ripple of N (⩾1) parallelly interleaved such modules (with equal phase shift 2π/N) is... View full abstract»

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  • Chinese National Cumulative Index on Radar Systems: 1988-1994

    Publication Year: 1996, Page(s):1523 - 1526
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4036 KB)

    This “second edition” is a continuation of the series of National Cumulative Indexes on Radar Systems inaugurated in 1988. These National series augment the periodic International Cumulative Indexes on Radar Systems which are prepared by members of the IEEE AESS Radar Systems Panel. Information on both series is contained in IEEE AES Transactions vol. 27, no. 3 p. 581 (May 1991) View full abstract»

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  • Improved COSPAS-SARSAT locating with geostationary satellite data

    Publication Year: 1996, Page(s):1405 - 1411
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (756 KB)

    The COSPAS-SARSAT system locates distress beacons via Doppler analysis of beacon transmissions as observed by low Earth orbiting (LEO) satellites. By contrast, the 406 MHz search and rescue transponder on the geostationary satellites can measure only the transmitted frequency of the beacon, which is not currently being used in location determination. This report shows that a combined data approach... View full abstract»

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  • A digital quadrature demodulation system

    Publication Year: 1996, Page(s):1218 - 1227
    Cited by:  Papers (17)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (904 KB)

    Existing digital quadrature demodulation techniques sample the input at either 2B Hz or 4B Hz, select the even samples as the in-phase (I), and interpolate the odd samples to give the quadrature (Q), output. The signal bandwidth is B. We propose a demodulation system to produce I and Q samples at arbitrary sampling rate greater than 2B Hz. The system eliminates the IF downconversion step with a sp... View full abstract»

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  • Stochastic stability theory for systems containing interval matrices

    Publication Year: 1996, Page(s):1385 - 1391
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (572 KB)

    Known conditions for the stability of stochastic, linear time-varying (LTV) dynamical systems based on Liapunov theory are applied to LTV dynamical systems containing interval matrices; both discrete and continuous time processes are considered. These conditions are sufficient for stability with probability 1 (wp1) and, in the case of discrete time, also necessary for stability in m.s. They lead t... View full abstract»

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  • An alternative closed-form solution to the GPS pseudo-range equations

    Publication Year: 1996, Page(s):1430 - 1439
    Cited by:  Papers (25)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (988 KB)

    In the four satellite Global Positioning System (GPS) problem, the system of pseudo-range equations is shown to be equivalent to a system of two linear equations together with a range difference and pseudo-range equation. The formulation represents the user's position as the intersection of two planes and a hyperbola branch of revolution. The formulation is three-dimensional and includes almost al... View full abstract»

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  • Model reduction and control of ASTREX using stable fractions

    Publication Year: 1996, Page(s):1268 - 1276
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (780 KB)

    The Advanced Space Structures Technology Research Experiments (ASTREX) is a precision structure situated at the Phillips Laboratory Edwards Air Force Base, CA. The structure is a test bed to develop, test, and validate control strategies for large-angle three-axis slewing manoeuvres and vibration suppression. The ASTREX facility consists of the test article (with primary, secondary, and tertiary s... View full abstract»

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  • Passive target tracking using maximum likelihood estimation

    Publication Year: 1996, Page(s):1348 - 1354
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (660 KB)

    Estimation of target trajectory from passive sonar bearings and frequency measurements in the presence of multivariate normally distributed noise, with unknown inhomogeneous general covariance, is modeled as a nonlinear multiresponse parameter estimation problem. It is shown that maximum likelihood estimation in this case is identical to optimizing a determinant criterion which has a concise form ... View full abstract»

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  • A new technique for decoding Loran-C radionavigation signals

    Publication Year: 1996, Page(s):1457 - 1467
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (840 KB)

    A new approach to the extraction of navigation information from Loran-C radionavigation signals is described. A reduced-rate time-reversed sequence is derived from the RF signal and processed by a finite-impulse response (FIR) filter. It is shown that proper design of the FIR filter and proper control of the sampling point guarantee the rejection of skywave contamination, and achieve excellent rej... View full abstract»

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  • Efficient solution and performance analysis of 3-D position estimation by trilateration

    Publication Year: 1996, Page(s):1239 - 1248
    Cited by:  Papers (126)  |  Patents (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (828 KB)

    A new exact, explicit, and computationally efficient solution for three-dimensional (3-D) position estimation based on range measurements from three stations is proposed. The simple polynomial-type form of the new algorithm facilitates the performance analysis. Formulae are provided for both the variance and the bias of the position estimates. The systematic error is a joint effect of both the mea... View full abstract»

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  • Strapdown INS error model for multiposition alignment

    Publication Year: 1996, Page(s):1362 - 1366
    Cited by:  Papers (38)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (528 KB)

    The relationship between quaternion errors and tilt angles from true navigation frame to analytic platform frame is newly derived for strapdown inertial navigation system (SDINS). Using the relationship it is shown that the quaternion error model for attitude and velocity is equivalent to the conventional perturbation error model. Based upon the equivalency, the quaternion errors during a multipos... View full abstract»

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  • Performance of the GLRT for adaptive vector subspace detection

    Publication Year: 1996, Page(s):1473 - 1487
    Cited by:  Papers (49)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1384 KB)

    The problem of adaptively detecting a signal confined to a given vector subspace in interference modeled as a zero-mean complex Gaussian N-vector is considered. The correlation properties of interference are not known but are estimated from a given set of secondary (or reference) vectors. The dimension of the known signal subspace is Ns, where 1⩽Ns⩽N. The Generalized ... View full abstract»

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  • A fast initial alignment method for strapdown inertial navigation system on stationary base

    Publication Year: 1996, Page(s):1501 - 1504
    Cited by:  Papers (54)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    In this paper a strapdown inertial navigation system (SINS) error model is introduced, and the observability of the SINS error model is analyzed. Then, on the basis of this SINS error model and the analysis of computer simulation results, a fast estimation method of the azimuth error ΦD is proposed for the initial alignment of SINS on stationary base. Consequently, the time of initi... View full abstract»

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  • Analytical solution of 3D true proportional navigation

    Publication Year: 1996, Page(s):1509 - 1522
    Cited by:  Papers (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (936 KB)

    The commanded acceleration applying in the direction normal to the line of sight (LOS) between the interceptor and its target is called true proportional navigation (TPN). The main goal of this work is to derive the complete analytical solutions of three-dimensional (3D) TPN for nonmaneuvering and maneuvering targets. Three coupled nonlinear second-order state equations describing the relative mot... View full abstract»

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  • Current-mode control for multiple-output converters

    Publication Year: 1996, Page(s):1412 - 1420
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (772 KB)

    A small-signal model for multiple-output forward converter with current-mode control is derived. The model can accurately predict the small-signal characteristics for current-mode control. It is observed that the power stage pole-zero relative positions, which are critical to the compensator design, are not affected by introducing current-mode control View full abstract»

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  • Automatic recognition of ISAR ship images

    Publication Year: 1996, Page(s):1392 - 1404
    Cited by:  Papers (85)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1356 KB)

    Inverse synthetic aperture radar (ISAR) produces images of ships at sea which human operators can be trained to recognize. Because ISAR uses the ship's own varying angular motions (roll, pitch, and yaw) for cross-range resolution, the viewing aspect and cross-range scale factor are continually changing on time scales of a few seconds. This and other characteristics of ISAR imaging make the problem... View full abstract»

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  • Data quantization effects in CFAR signal detection

    Publication Year: 1996, Page(s):1277 - 1289
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1012 KB)

    In this paper, we investigate data quantization effects in constant false alarm rate (CFAR) signal detection. Exponential distribution for the input data and uniform quantization are assumed for the CFAR detector analysis. Such assumptions are valid in the case of radar for a Swerling I target in Gaussian clutter plus noise and a receiver with analog square-law detection followed by analog-to-digi... View full abstract»

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  • Nonlinear clutter cancellation and detection using a memory-based predictor

    Publication Year: 1996, Page(s):1249 - 1256
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (804 KB)

    In this paper, a nonlinear prediction (NLP) method is proposed as an alternative to the conventional linear prediction (LP) method for clutter cancellation. Because of the nonlinearity and non-Gaussianity of a clutter process, a nonlinear predictor is therefore needed to suppress clutter optimally. A memory-based predictor which uses a table look-up strategy to perform NLP is used in this work. Th... 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. 

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Lance Kaplan
Army Research Laboratory