Superimposed Noise Estimation on Observed Radio Wave Time Series of Quasars

Md. Mostafizur Rahman KHAN; Noboru TANIZUKA

Superimposed Noise Estimation on Observed Radio Wave Time Series of Quasars

Md. Mostafizur Rahman KHAN, Noboru TANIZUKA

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The radio wave intensity time series of the quasar is observed with the radio wave interferometer on the earth. External noise may superimpose with the radio wave on the path of wave propagation over the cosmological distance. In this paper, the effects of the superimposed noise on the radio wave intensity time series are discussed assuming nonlinear dynamics to apply on the time series. A convolution method is applied to the original observed radio wave intensity time series. Both the original and the convolution time series are analyzed by the Grassberger-Procaccia (GP) method with correlation integration and compared the results to estimate the presence and the effects of superimposed subtle noise. In addition, surrogate and Judd methods are applied to the radio wave intensity time series to increase the credibility of the results of the GP method. The effects of added random noise in Lorenz model are also analyzed with the GP method to estimate the above results.

Publication: IEICE TRANSACTIONS on Fundamentals Vol.E86-A No.9 pp.2209-2217

Publication Date: 2003/09/01

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Type of Manuscript: Special Section PAPER (Special Section on Nonlinear Theory and its Applications)

Category: Nonlinear Phenomena

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Md. Mostafizur Rahman KHAN, Noboru TANIZUKA, "Superimposed Noise Estimation on Observed Radio Wave Time Series of Quasars" in IEICE TRANSACTIONS on Fundamentals, vol. E86-A, no. 9, pp. 2209-2217, September 2003, doi: .
Abstract: The radio wave intensity time series of the quasar is observed with the radio wave interferometer on the earth. External noise may superimpose with the radio wave on the path of wave propagation over the cosmological distance. In this paper, the effects of the superimposed noise on the radio wave intensity time series are discussed assuming nonlinear dynamics to apply on the time series. A convolution method is applied to the original observed radio wave intensity time series. Both the original and the convolution time series are analyzed by the Grassberger-Procaccia (GP) method with correlation integration and compared the results to estimate the presence and the effects of superimposed subtle noise. In addition, surrogate and Judd methods are applied to the radio wave intensity time series to increase the credibility of the results of the GP method. The effects of added random noise in Lorenz model are also analyzed with the GP method to estimate the above results.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1587/e86-a_9_2209/_p

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@ARTICLE{e86-a_9_2209,
author={Md. Mostafizur Rahman KHAN, Noboru TANIZUKA, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={Superimposed Noise Estimation on Observed Radio Wave Time Series of Quasars},
year={2003},
volume={E86-A},
number={9},
pages={2209-2217},
abstract={The radio wave intensity time series of the quasar is observed with the radio wave interferometer on the earth. External noise may superimpose with the radio wave on the path of wave propagation over the cosmological distance. In this paper, the effects of the superimposed noise on the radio wave intensity time series are discussed assuming nonlinear dynamics to apply on the time series. A convolution method is applied to the original observed radio wave intensity time series. Both the original and the convolution time series are analyzed by the Grassberger-Procaccia (GP) method with correlation integration and compared the results to estimate the presence and the effects of superimposed subtle noise. In addition, surrogate and Judd methods are applied to the radio wave intensity time series to increase the credibility of the results of the GP method. The effects of added random noise in Lorenz model are also analyzed with the GP method to estimate the above results.},
keywords={},
doi={},
ISSN={},
month={September},}

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TY - JOUR
TI - Superimposed Noise Estimation on Observed Radio Wave Time Series of Quasars
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 2209
EP - 2217
AU - Md. Mostafizur Rahman KHAN
AU - Noboru TANIZUKA
PY - 2003
DO -
JO - IEICE TRANSACTIONS on Fundamentals
SN -
VL - E86-A
IS - 9
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - September 2003
AB - The radio wave intensity time series of the quasar is observed with the radio wave interferometer on the earth. External noise may superimpose with the radio wave on the path of wave propagation over the cosmological distance. In this paper, the effects of the superimposed noise on the radio wave intensity time series are discussed assuming nonlinear dynamics to apply on the time series. A convolution method is applied to the original observed radio wave intensity time series. Both the original and the convolution time series are analyzed by the Grassberger-Procaccia (GP) method with correlation integration and compared the results to estimate the presence and the effects of superimposed subtle noise. In addition, surrogate and Judd methods are applied to the radio wave intensity time series to increase the credibility of the results of the GP method. The effects of added random noise in Lorenz model are also analyzed with the GP method to estimate the above results.
ER -