Scaling and stationarity analysis of discrete time signal of Solar Radio flux

Author

Kumar, Chanchal ; Prasad, Athul ; Barui, Rajib ; Patra, Sankar Narayan ; Ghosh, Koushik

Author_Institution

Dept. of ECE, Univ. Inst. of Technol., Golapbag, India

fYear

2014

fDate

Jan. 31 2014-Feb. 2 2014

Firstpage

608

Lastpage

611

Abstract

In the present work, we have considered the daily signal of Solar Radio flux of 2800 Hz recorded daily by radio telescopes near Ottawa (operated during 14^th February, 1947-31^st May, 1991) and Penticton, British Columbia, Dominion Radio Astrophysical Observatory (operating since 1^st June, 1991) during the period from 29^th October, 1972 to 28^th February, 2013. We have applied FIR nonlinear phase filter on the present discrete signal to denoise it. The memory of this denoising signal has been analyzed and it indicates short memory trend (anti-persistent) hidden in this spectrum. Then we have examined whether the signal possesses stationary properties. On the basis of autocorrelation analysis, quasi or partly stationary nature of the spectrum has been revealed.

Keywords

FIR filters; radiotelescopes; signal denoising; British Columbia; Dominion Radio Astrophysical Observatory; FIR nonlinear phase filter; Ottawa; Penticton; discrete signal denoising; discrete time signal; frequency 2800 Hz; radio telescopes; signal possesses; solar radio flux; stationarity analysis; Correlation; Educational institutions; Finite impulse response filters; Instruments; Noise reduction; Polynomials; Time series analysis; Hurst exponent; Savitzky-Golay nonlinear phase filter; Solar radio flux; autocorrelation function; finite variance scaling method; quasi stationary process; short memory process;

fLanguage

English

Publisher

ieee

Conference_Titel

Control, Instrumentation, Energy and Communication (CIEC), 2014 International Conference on

Conference_Location

Calcutta

Type

conf

DOI

10.1109/CIEC.2014.6959161

Filename

6959161