DocumentCode :
3020398
Title :
Ultra-low frequency signal filtering in the downhole based on the matlab simulation
Author :
Wang Bo ; Zhou Hongfeng ; Li Qing
Author_Institution :
Coll. of Chem., Liaoning Shihua Univ., Fushun, China
fYear :
2013
fDate :
20-22 Dec. 2013
Firstpage :
548
Lastpage :
553
Abstract :
In order to be convenient for oil exploration, we need to detect the variation of the pressure, flow, temperature in the oil downhole.When the data is detected, it should be transmitted to the relevant device. The fourth generation mobile communication technology-OFDM (Orthogonal Frequency Division Multiplexing, using ulti-carrier modulation transmission technology) is applied to transmit data, in order to use of spectrum bandwidth more effectively. It is simulated through mathematical software Matlab that the Ultra-low frequency signal pass through the 8 order Bessel (Bessel1) low-pass filter, cutoff frequency is 10 Hz. The variation of the signal´s phase and amplitude is simulated. Using the group delay flat characteristics of Bessel filter, the signal is received synchronously. The signal (the frequency is 2Hz and 9Hz) is simulated and analyzed concretely in different initial phase. At the same time, 50Hz interference and 1 / f noise is filtered out. Finally the feasibility of using 8 order Bessel low pass filter is analyzed.
Keywords :
1/f noise; 4G mobile communication; OFDM modulation; low-pass filters; mathematics computing; petroleum industry; signal processing; 1/f noise; 4G mobile communication technology; 8 order Bessel; Bessel filter; Bessel1 low-pass filter; Matlab simulation; OFDM; downhole; frequency 10 Hz; multicarrier modulation transmission technology; orthogonal frequency division multiplexing; spectrum bandwidth; ultra-low frequency signal filtering; ultra-low frequency signal pass; Bessel low pass filter; Linear phase; OFDM; Ultra-low frequency signal; synchronous;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Mechatronic Sciences, Electric Engineering and Computer (MEC), Proceedings 2013 International Conference on
Conference_Location :
Shengyang
Print_ISBN :
978-1-4799-2564-3
Type :
conf
DOI :
10.1109/MEC.2013.6885125
Filename :
6885125
Link To Document :
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