NDLI: Random Noise and Coherent Interference Estimation of MT Instrument

Content Provider	IEEE Xplore Digital Library
Author	Chen Rujun He Zhanxiang He Lanfang Liu Xuejun
Copyright Year	2008
Description	Author affiliation: Non-Seismic Survey, Bur. of Geophys. Prospecting, Zhuozhou (Chen Rujun; He Zhanxiang; He Lanfang; Liu Xuejun)
Abstract	Random noise and coherent interference are major factors determine the performance of MT instrument. Based on auto and cross power spectrum of channels inside MT instrument, procedure is developed to estimate noise and coherent interference inside MT instrument. At first, short circuited input is applied to all channels of MT instrument. Coherent interference inside instrument is estimated by signal to noise ratio (SNR) of arbitrary two channels. Secondly, all channels of instrument are connected to same random noise input. Random noise inside instrument is estimated by noise spectrum of arbitrary two channels. MTU-5P of system 2000 is used for experiment. Experiment result shows that coherent interference, which is about 8 times random noise, exist in TS5 data; normalized power spectrum density of white noise is below -150 dB; it shows excellent performance in wide frequency band, but coherence interference in some band need to be minimized.
Sponsorship	Int. Assoc. Comput. Sci. Inf. Technol.
Starting Page	368
Ending Page	372
File Size	238520
Page Count	5
File Format	PDF
ISBN	9780769535043
DOI	10.1109/ICCEE.2008.163
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-12-20
Publisher Place	Thailand
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Linear systems Magnetotellurics Instruments Transfer functions Interference random noise spectral analysis instrument Helium Geophysics computing Spectral analysis coherence interference Coherence Circuit noise Signal to noise ratio
Content Type	Text
Resource Type	Article

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