Results 261 to 270 of about 15,657 (289)

A pole-zero-tracking constant modulus algorithm

International Conference on Acoustics, Speech, and Signal Processing, 2003
An approach to multipath correction in FM transmission is proposed. It is based on the factorization of the channel transfer function in terms of the roots of the underlying polynomial. A time-recursive algorithm for the identification of the roots of the all-zero channel transfer function at the receiver is presented.
Rodolfo Mann, Karl-Dirk Kammeyer
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Resilient Modulus Backcalculation Techniques for Track

Performance Confirmation of Constructed Geotechnical Facilities, 2000
The layer moduli of track substructure components are important factors in the evaluation of track condition and estimation of maintenance costs. Layer moduli can be estimated from in-situ tests such as the cone penetration test (CPT); however, for layers of open graded aggregate, such as railway ballast with large individual particles, the results of ...
Theodore R. Sussmann, Ernest T. Selig
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On the Tracking Performance of a Family of Generalized Constant Modulus Algorithm

2007 IEEE International Conference on Acoustics, Speech and Signal Processing - ICASSP '07, 2007
Based on an energy conservation relation, the tracking performance of a family of generalized constant modulus algorithm (GCMA) is analyzed in this paper. Both theoretical analysis and simulation results validate the excellent tracking performance of the extended constant modulus algorithm (ECMA) in some situations.
Xi-Lin Li, Xian-Da Zhang
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Exception Criteria in Vertical Track Deflection and Modulus

ASME/IEEE 2007 Joint Rail Conference and Internal Combustion Engine Division Spring Technical Conference, 2007
The network constraints of freight railroad traffic are moving the industry to heavier tonnage trains, higher axle loads and increased velocity. The dynamics of heavier axle loads and speed produce high stresses in the track infrastructure. Track integrity is strongly related to the vertical track modulus — the relationship between the rail deflection ...
Sheng Lu, Cory Hogan, Brock Minert, Richard Arnold, Shane Farritor, William GeMeiner, Dwight Clark   +6 more
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Tracking behavior of the constant modulus array for time-varying channels

1996 IEEE International Conference on Acoustics, Speech, and Signal Processing Conference Proceedings, 2002
In this paper, we present a stochastic analysis of the constant modulus (CM) array for time-varying channels. An expression for the mean-square error is derived, which is based on a recursion for the weight-error correlation matrix. The analysis yields an accurate model of the tracking behavior of the CM array provided the array maintains capture on ...
Arvind V. Keerthi, Amit Mathur, John J. Shynk   +2 more
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Measurement of Vertical Track Modulus: Field Testing, Repeatability, and Effects of Track Geometry

IEEE/ASME/ASCE 2008 Joint Rail Conference, 2008
The heavy axle loads and high speeds of modern freight trains produce high track stresses leading to quicker track degradation. Track loads can be increased by variations in vertical track stiffness — the relationship between vertical rail deflection and the vertical applied load — and vertical track modulus. Both low track modulus and large variations
Magdy El-Sibaie, William GeMeiner, Dwight Clark, Leith Al-Nazer, Richard Arnold, Shane Farritor, Mahmood Fateh, Sheng Lu, Gary Carr   +8 more
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Steady-state and Tracking Analysis of Fractional Lower-order Constant Modulus Algorithm

Circuits, Systems, and Signal Processing, 2011
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Sen Li, Limin Song, Tianshuang Qiu
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ACTIVE CONTOUR MODEL USING WAVELET MODULUS FOR OBJECT SEGMENTATION AND TRACKING IN VIDEO SEQUENCES

International Journal of Wavelets, Multiresolution and Information Processing, 2003
We propose an integrated wavelet-based framework of the active contour model (snake) for segmentation and motion tracking of deformable objects in video sequences. The input image frame is represented by means of wavelet transform. First, the moduli of wavelet transform coefficients are used in a multi-resolution motion estimation process to find the ...
Jen-Chang Liu, Wen-Liang Hwang
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Evaluating the potential of a rolling deflection measurement system to estimate track modulus

Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, 2016
Over the past two decades, a rolling deflection measurement system aiming to continuously measure the track modulus has been under development at the University of Nebraska – Lincoln under the sponsorship of the Federal Railroad Administration. This system measures the relative vertical distance (referred to as Y
Saeideh Fallah Nafari, Mustafa Gül, Alireza Roghani, Michael T Hendry, JJ Roger Cheng   +4 more
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Tracking highly correlated sources via multistage constant modulus array

Oceans 2003. Celebrating the Past ... Teaming Toward the Future (IEEE Cat. No.03CH37492), 2003
An effective method is proposed for "half blindly" recovering coherent signals impinging on a uniform linear array (ULA) and estimating their directions of arrival (DOAs). The generalized steering vector is blindly estimated from the CM array, where the steering vectors to all coherent signals are reconstructed directly by using the property of ...
null Chao Sun, null Jie Zhuo
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