Results 241 to 250 of about 2,159,458 (286)

Mechanical Contact Conditions in Wearable Reflectance Photoplethysmography: Scoping Review. [PDF]

JMIR Mhealth Uhealth
Yang C, Xie J, He Z, Li J, Liu C.
europepmc   +1 more source

Correcting fast irregular motion in PET: maximum-likelihood motion and activity (MLMA) reconstruction. [PDF]

EJNMMI Phys
José Santo R, Waterink E, van den Berg CAT, Olausson T, Sbrizzi A, de Jong HWAM, Beijst C.   +6 more
europepmc   +1 more source

Model-based cardiac field artefact correction for OP-MEG. [PDF]

Imaging Neurosci (Camb)
Woelk SP, Alexander NA, O'Neill GC, Garfinkel SN, Barnes GR.   +4 more
europepmc   +1 more source

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Amplitude-only versus amplitude-phase estimation

IEEE Transactions on Instrumentation and Measurement, 1990
The feasibility of transfer function estimation based on amplitude-only measurements is investigated, and this method is compared with the amplitude-phase (full complex spectrum) method. It is shown that the amplitude-only-based method is a feasible alternative to the full complex spectrum method when the minimum in-phase transfer function of the ...
Johan Schoukens, Rik Pintelon, Yves Rolain   +2 more
exaly   +4 more sources

Amplitude and Frequency Estimation of Exponentially Decaying Sinusoids

IEEE Transactions on Instrumentation and Measurement, 2018
An online method for amplitude and frequency estimation of exponentially decaying sinusoids is proposed with a moving-window discrete Fourier transform (MWDFT) filter and frequency-locked loop. The tuned filter characteristics of MWDFT is modified into more flat characteristic around the center frequency with negative feedback, which increases the ...
Sumathi Parasuraman
exaly   +2 more sources

On estimating random amplitude chirp signals

1999 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings. ICASSP99 (Cat. No.99CH36258), 1999
This paper considers the problem of estimating the parameters of chirp signals with randomly time-varying amplitude. Two methods for solving this problem are presented. First, a nonlinear least-squares approach (NLS) is proposed. It is shown that by minimizing the NLS criterion with respect to all samples of the time-varying amplitude, the problem ...
Olivier Besson, Mounir Ghogho, Ananthram Swami   +2 more
openaire   +2 more sources

Robust estimation of signal amplitude

IEEE Transactions on Information Theory, 1972
An iterative estimation procedure involving the use of a light limiter is proposed for obtaining robust estimates of the amplitude of a signal of known form in additive nearly Gaussian noise. In the case of a constant signal the procedure, referred to as the iterative limiter estimator (ILE), is exhibited as a form of stochastic approximation and the ...
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Sequential amplitude estimation in multiuser communications

[1992] Proceedings of the 31st IEEE Conference on Decision and Control, 1994
Summary: This paper considers the problem of multiuser amplitude estimation, i.e., the problem of estimating the amplitudes of several digital communications signals superimposed in the same channel. This problem is of importance in communications environments such as spread-spectrum radio networks, in which nonorthogonal multiplexing is used ...
Yossef Steinberg, H. Vincent Poor
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Polynomial estimation of the amplitude of a signal

IEEE Transactions on Information Theory, 1994
Summary: The problem of estimating the amplitude of a signal is addressed using higher-order statistics. The probability distribution of the noise is assumed to be unknown so that the maximum likelihood estimator cannot be calculated. The estimator is taken as a polynomial of the observation, the coefficients of which are determined so that the ...
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Amplitude and frequency estimator of a sinusoid

IEEE Transactions on Automatic Control, 2005
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