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1992 Military Communications Conference, MILCOM 1992

作者： Hilands, T.W. Thomopoulos, S.C.A. Pennsylvania State Univ. Applied Research Laboratory University ParkPA16802 United States Decision and Control Systenls Laboratory Dept. of Electrical and Computer Engineering Pennsylvania State University University ParkPA16802 United States

ISBN: (纸本)078030585X

The authors address the problem of high-resolution parameter estimation of superimposed sinusoids using nonlinear filtering techniques. Six separate nonlinear filters are evaluated for the estimation of the parameters of sinusoids in white and colored Gaussian noise. Experimental evaluation demonstrates that the nonlinear filters perform very satisfactorily (close to the Cramer-Rao bound) for reasonable values of the initial estimation error. A major advantage of using nonlinear filtering methods for harmonic retrieval is that the filters can be applied to time-varying process models as well. © 1992 IEEE.

关键词： Nonlinear filtering

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Nonlinear adaptive detection/estimation for single and multiple radar processing

Nonlinear adaptive detection/estimation for single and multi...

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1992 Military Communications Conference, MILCOM 1992

作者： Thomopoulos, S.C.A. Hilands, T.W. Pennsylvania State Univ. Decision and Control Systems Laboratory Dept. of Electrical and Computer Engineering University ParkPA16802 United States Applied Research Laboratory Pennsylvania State University University ParkPA16802 United States

ISBN: (纸本)078030585X

A nonlinear adaptive detector/estimator is introduced for single and multiple radar data processing. The problem of target detection from returns of monostatic radar(s) is formulated as a nonlinear joint detection/estimation problem on the unknown parameters in the signal return. The problems of detecting the target and estimating its parameters are considered jointly. A bank of spatially and temporally localized nonlinear filters is used to estimate the a posteriori likelihood of the existence of the target in a given space-time resolution cell. Within a given cell, the localized filters are used to produce refined spatial estimates of the target parameters. A decision logic is used to decide on the existence of a target within any given resolution cell based on the a posteriori estimates obtained from the likelihood functions. Simulation results show excellent detection capabilities and excellent resolution in target parameter estimation for both single and multiple sensor data. © 1992 IEEE.

关键词： Data handling

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Joint detection/estimation for modal order selection in Gaussian and nonGaussian noise

Joint detection/estimation for modal order selection in Gaus...

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1992 Military Communications Conference, MILCOM 1992

ISBN: (纸本)078030585X

The authors present a general approach to determining the number of sinusoids present in measurements corrupted by additive white Gaussian and nonGaussian noise. The approach involves the simultaneous application of maximum a posteriori detection and nonlinear estimation using either the extended Kalman filter when the noise is Gaussian, or the extended high order filter when the noise is nonGaussian. The problem is formulated as a multiple hypothesis testing problem with assumed known a priori probabilities for each hypothesis. The advantage of the approach lies in the potential to accommodate time-varying as well as time-invariant parameters in the measurement model. Experimental evaluation of the approach demonstrates excellent performance in selecting the correct model order and estimating the system parameters even for signal-to-noise ratios as low as -5 dB. © 1992 IEEE.

关键词： Signal to noise ratio

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ADAPTIVE DC-OFFSET COMPENSATION ALGORITHM FOR BURST MODE OPERATED DIRECT CONVERSION RECEIVERS 42

ADAPTIVE DC-OFFSET COMPENSATION ALGORITHM FOR BURST MODE OPE...

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42ND CONF OF THE VEHICULAR TECHNOLOGY SOC - FRONTIERS OF TECHNOLOGY : FROM PIONEERS TO THE 21ST CENTURY

作者： SAMPEI, S FEHER, K Communications Research Laboratory Ministry of Posts and Telecommunications 2-1 Nukui-Kitamachi 4-chome Koganei-shi Tokyo 184 Japan Digital Communications Research Group Dept. of Electrical and Computer Engineering University of California Davis Davis 95616 CA United States DIGICOM Inc. United States

ISBN: (纸本)0780306732

Low-redundancy DC-offset compensation method is proposed and studied to achieve high quality burst mode operated direct conversion receivers. DC- offset is compensated for by using a short known symbol sequence in preamble. We demonstrate by computer simulations that 5 redundant symbols can drastically suppress DC-offset with the DC-offset ratio up to 40% with degradation of only 1.5 dB. We also demonstrate that if the DC-offset ratio to be compensat-ed for is small, only 3 redundant symbols can sufficiently suppress the DC-offset. © 1992 Institute of electrical and Electronics Engineers Inc.. All rights reserved.

关键词： Radio receivers

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Non-Linear control with End-Point Acceleration Feedback for a Two-Link Flexible Manipulator: Experimental Results

Non-Linear Control with End-Point Acceleration Feedback for ...

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American control Conference (ACC)

作者： Farshad Khorrami Sandeep Jain Control/Robotics Research Laboratory School of Electrical Engineering & Computer Science Polytechnic University Brooklyn NY USA

In this paper, experimental results for a two-stage controller comprised of a rigid-body based nonlinear control augmented with a linear dynamic output feedback derived from Youla's parameterization of stabilizing controllers are presented for a two-link flexible arm at CRRL. It is shown that the outer-loop controller enhances vibration damping and robustness of the closed-loop dynamics to parameter variations.

关键词： Acceleration Linear feedback control systems Output feedback Payloads Vibration control Robust control Accelerometers Hydraulic actuators PD control control systems

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Adaptive DC-offset compensation algorithm for burst mode operated direct conversion receivers

Adaptive DC-offset compensation algorithm for burst mode ope...

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IEEE Conference on Vehicular Technology (VTC)

作者： S. Sampei K. Feher Communications Research Laboratory Ministry of Posts and Telecommunications Koganei Tokyo Japan Digital Communications Research Group Department of Electrical & Computer Engineering University of California슠Davis Davis CA USA

A low-redundancy DC-offset compensation method to achieve high-quality burst mode operated direct conversion receivers is proposed and studied. DC-offset is compensated for by using a short known-symbol sequence in preamble. It is demonstrated by computer simulations that five redundant symbols can drastically suppress DC-offset with the DC-offset ratio up to 40% with degradation of only 1.5 dB. It is also demonstrated that, if the DC-offset ratio to be compensated for is small, only three redundant symbols can sufficiently suppress the DC-offset.< >

关键词： Personal communication networks computer simulation Degradation Data communication Demodulation Least squares approximation Europe North America Standardization Telecommunication standards

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Joint detection/estimation for modal order selection in Gaussian and nonGaussian noise

Joint detection/estimation for modal order selection in Gaus...

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MILCOM, Military Communications Conference

作者： S.C.A. Thomopoulos T.W. Hilands Decision and Control Systems Laboratory Department of Electrical and Computer Engineering Pennsylvania State University University Park PA USA Applied Research Laboratory Pennsylvania State University University Park PA USA

关键词： Gaussian noise State estimation Noise measurement Autocorrelation Matrix decomposition Recursive estimation control systems Additive noise Additive white noise Application software

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Nonlinear adaptive detection/estimation for single and multiple radar processing

Nonlinear adaptive detection/estimation for single and multi...

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MILCOM, Military Communications Conference

作者： S.C.A. Thomopoulos T.W. Hilands Department of Electrical and Computer Engineering Decision and Control Systems Laboratory Pennsylvania State University University Park PA USA Applied Research Laboratory Pennsylvania State University University Park PA USA

关键词： Radar detection Spatial resolution Parameter estimation Detectors Data processing Object detection Nonlinear filters Signal resolution Refining Logic

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Nonlinear filtering methods for harmonic retrieval

Nonlinear filtering methods for harmonic retrieval

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MILCOM, Military Communications Conference

作者： T.W. Hilands S.C.A. Thomopoulos Applied Research Laboratory Pennsylvania State University University Park PA USA Decision and Control Systems Laboratory Department of Electrical and Computer Engineering Pennsylvania State University University Park PA USA

关键词： Filtering Power harmonic filters Nonlinear filters Noise measurement Parameter estimation Equations Gaussian noise Frequency estimation Damping White noise

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Sufficient Conditions for the Robust Stability of Systems with Multiaffine Parameter Dependence

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IFAC Proceedings Volumes 1992年第21期25卷 168-171页

作者： B.D.O. Anderson F.J. Kraus M. Mansour S. Dasgupta Department of Systems Engineering Research School of Physical Sciences and Engineering Australian National University GPO Box 4 Canberra ACT 2601 Australia. Automatic Control Laboratory ETH Zurich 8092 Zürich Switzerland Department of Electrical & Computer Engineering University of Iowa Iowa City lA 52242 USA.

A number of robust stability problems take the following form: A polynomial has real coefficients wvhich are multiaffine in real parameters that are confined to a box in parameter space. An efficient method is required for checking the stability of this set of polynomials. We present two sufficient conditions in this paper. They involve: checking certain properties at the corners and edges of the parameter space box.

关键词： Robust Stability Multiaffine Parameter Dependence

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