Results 231 to 240 of about 10,344,236 (307)

On Parameter Estimation in the Presence of Noise

Theory of Probability & Its Applications, 1985
In this paper the author gives practically useful and computationally efficient closed-form expressions for estimators of the parameter \(\alpha\) in the stochastic differential equation \[ d\theta (t)=-\alpha \theta (t)dt+c_ 1dw_ 1(t),\quad t\geq 0. \] The estimator is based on observations of \(\xi\), where \(\xi =\theta +\epsilon\) and \(d\epsilon ...
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Verification of Noise-Parameter Measurements and Uncertainties

IEEE Transactions on Instrumentation and Measurement, 2011
We propose and implement verification methods for measurements of the noise parameters of amplifiers and transistors. Because the verification rests on the comparison of different measurement results, it also serves as a test of the uncertainties. The verification process consists of first measuring separately both a passive two-port device and the ...
James Randa, Joel Dunsmore, Dazhen Gu, Ken Wong, David K. Walker, Roger D. Pollard   +5 more
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Virtual test of noise and jitter parameters

Proceedings International Test Conference 1996. Test and Design Validity, 2002
Virtual test has proven its enormous advantages for test development, yet the use of deterministic simulation models prevented reproduction of statistical effects. This paper introduces a virtual test concept that includes noise and jitter phenomena.
Klaus Helmreich, G. Reinwardt
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Noise reduction on speech codec parameters

2004 IEEE International Conference on Acoustics, Speech, and Signal Processing, 2004
The transmission of speech in mobile or packet networks requires the use of a speech codec. In order to improve the quality of speech in a noisy environment, a noise reduction algorithm is used. This noise reduction can either be done as pre-processing before speech encoding or in the network by decoding the bitstream, performing the speech enhancement
Hervé Taddei, Christophe Beaugeant, Mickaël De Meuleneire   +2 more
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Bandwidth Conversion of ELF Noise Parameters

IEEE Transactions on Communications, 1984
The Field-Lewinstein-Modestino model represents ELF noise as the sum of Gaussian and impulsive components. This model has proven to be accurate and is especially convenient for analysis and simulation. However, the parameters of the model are bandwidth dependent and have been measured for only a few specific bandwidths.
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Measurement and modeling of noise parameters for desensitized low noise amplifiers

Proceedings of the IEEE 2004 Custom Integrated Circuits Conference (IEEE Cat. No.04CH37571), 2004
It can be shown that devices with low noise resistance (R/sub n/) values can significantly relax the noise-input match trade-off in LNA design, resulting in desensitized wideband LNAs. In this paper, we show that the measurements of such devices are error-prone and can cause modeling and simulation inaccuracies.
Gaurab Banerjee, David T. Becher, Celia Hung, David J. Allstot, Krishnamurthy Soumyanath   +4 more
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Novel Noise Parameter Determination for On-Wafer Microwave Noise Measurements

IEEE Transactions on Instrumentation and Measurement, 2008
A novel method to determine the noise parameters of receivers or devices under test (DUTs) for on-wafer microwave noise measurements is presented. An iterative technique is utilized, and fast convergence is achieved by the proposed impedance selection principle. This proposed method reduces the parameter variations in the conventional methods.
Chih-Hung Chen, Ying-Lien Wang, M. H. Bakr, Zheng Zeng   +3 more
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Estimation of signal parameters in the presence of noise

Transactions of the IRE Professional Group on Information Theory, 1954
This paper is concerned with certain applications of the estimation theory of Fisher and Cramer[1] to the problem of estimating signal parameters in the presence of noise. Specifically, the situation to be treated is as follows.
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Simplified noise model parameter estimation for signal-dependent noise

Signal Processing, 2014
In this paper, we present a noise parameter estimation method using a simplified signal-dependent noise model. The generic Poisson-Gaussian noise model is simplified to a Gaussian-Gaussian noise model. From the simplified noise model, we experimentally verify that the value obtained by the robust median estimator is almost the same as the mean of the ...
Bo Gyu Jeong, Byoung Chul Kim, Yong Ho Moon, Il Kyu Eom   +3 more
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Signal Parameter Optimization for the Impulsive Noise Channel

IEEE Transactions on Communications, 1980
Summary: A common assumption in the analysis of impulsive noise channels is that at most one noise impulse occurs to affect any given decision. In practice, this assumption is not always valid. However, in this work it is shown that optimum signals parameter values can be determined subject to the single noise impulse assumption.
James C. Vanelli, Nazmi M. Shehadeh
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