Results 251 to 260 of about 2,019,128 (293)

Multiplicative noise models: parameter estimation using cumulants

Fifth ASSP Workshop on Spectrum Estimation and Modeling, 1990
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Noise adaptive speech recognition based on sequential noise parameter estimation

Speech Communication, 2004
In this paper, a noise adaptive speech recognition approach is proposed for recognizing speech which is corrupted by additive non-stationary background noise. The approach sequentially estimates noise parameters, through which a non-linear parametric function adapts mean vectors of acoustic models.
Yao, KS, Paliwal, KK, Nakamura, S
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Noise parameter modeling of HEMTs with resistor temperature noise sources

1994 IEEE MTT-S International Microwave Symposium Digest (Cat. No.94CH3389-4), 2002
We present a new model to describe the millimeter wave noise performance of MESFETs and HEMTs. The model is used to extrapolate the noise parameters in frequency range and to describe the noise behaviour over a wide range of bias points. The model is based on three uncorrelated noise sources located at the intrinsic transistor, which are assumed to ...
T. Felgentreff, G. Olbrich, P. Russer
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Noise-Robust Parameter Estimation of Linear Systems

Journal of Vibration and Control, 2000
The parameter estimation problem of linear systems from input output measurements, corrupted with nonwhite noise of unknown covariance, is considered. Under this realistic situation, the least squares parameters estimation is known to be biased.
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Remote Sensing Image Mixed Noise Denoising with Noise Parameter Estimation

2020
Images acquired by optical remote sensing often suffer from noise, due to low-light conditions and long distances from the object. Noise introduces undesirable effects such as artifacts, unrealistic edges, unseen lines and corners, blurred objects and disturbed background scenes, and decreasing the performance of visual and computational analysis.
Mutian Wang, Sijie Zhao, Xun Cao, Tao Yue, Xuemei Hu   +4 more
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Extraction of Microwave FET Noise Parameters Using Frequency- Dependent Equivalent Noise Temperatures

2007 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference, 2007
A method for determining the noise parameters of high frequency field-effect transistors is presented. It has been developed by expressing the chain correlation matrix of the device as a function of its H-parameters and two frequency- dependent equivalent noise temperatures.
CICCOGNANI, WALTER, GIANNINI, FRANCO, LIMITI, ERNESTO, Nanni, A, SERINO, ANTONIO, Lanzieri, C, Peroni, M.   +6 more
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Determination of multi-port noise parameters

2016 46th European Microwave Conference (EuMC), 2016
The paper outlines the main results of a novel and comprehensive analysis for the determination of the noise parameters of linear noisy microwave networks with any number of ports. The well-established approach by Lane for the case of linear 2 port networks becomes a particular case of this analysis.
Luciano Boglione, Joel Goodman
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FET noise model and on-wafer measurement of noise parameters

1991 IEEE MTT-S International Microwave Symposium Digest, 1991
A noise model of a microwave FET (M.W. Pospieszalski 1988, 1989) is verified with on-wafer S-parameters and noise parameter measurement data. An excellent agreement between the model prediction and measurement results is obtained for a wide range of FET bias.
M.W. Pospieszalski, A.C. Niedzwiecki
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Microwave Noise Modeling and Parameter

2010
In this chapter, we introduced the noise modeling and parameter extraction methods for FET device, as well as how to determine noise parameters, including the tuner-based method and the noise figure-based method.
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Verification of the Noise Parameter Instrumentation

49th ARFTG Conference Digest, 1997
The available gain of a linear two-port device, as a function of a source reflection coefficient, can be characterized by measuring its scattering parameters on a Vector Network Analyzer(VNA). An alternate characterization procedure of the available gain, as a function of a source reflection coefficient, using a noise source and noise figure receiver ...
Vahe' Adamian, Randy Fenton
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