Title :
Improvement of the signal to noise ratio of the magnetic detection system using the geological magnetic filter
Author :
Kim, Won-Ho ; Kim, Jue-Chul ; Choi, In-Kyu ; Park, Jong-Sik
Author_Institution :
Dept. of Electron. Eng., Dongeui Inst. of Technol., South Korea
Abstract :
A theory of the geological magnetic filter for improvement of the signal to noise ratio of the magnetic detection system has been developed. The geological magnetic filter takes two sequences of magnetic fields measured from the reference sensor and the detector sensor and calculates the correlations between them in the frequency domain. Using the filter, we can remove the coherent noises in the time domain and improve the signal to noise ratio of the magnetic anomaly detecting system. We show the ability of the geological magnetic filter under various circumstances through computer simulations. Numerical simulation results show that the geological magnetic filter can remove sensor misalignment effects and regular short range local noise as well as coherent noise
Keywords :
FIR filters; correlation methods; filtering theory; frequency-domain analysis; geomagnetism; geophysical signal processing; interference suppression; magnetic field measurement; magnetic sensors; FIR filter coefficients; coherent noise removal; computer simulations; correlations; detector sensor; frequency domain; geological magnetic filter; magnetic anomaly detecting system; magnetic detection system; magnetic field sequences; numerical simulation results; reference sensor; sensor misalignment effects; short range local noise; signal to noise ratio; time domain; Detectors; Frequency measurement; Geologic measurements; Geology; Magnetic domains; Magnetic field measurement; Magnetic noise; Magnetic sensors; Magnetic separation; Signal to noise ratio;
Conference_Titel :
Electronics, Circuits and Systems, 1999. Proceedings of ICECS '99. The 6th IEEE International Conference on
Conference_Location :
Pafos
Print_ISBN :
0-7803-5682-9
DOI :
10.1109/ICECS.1999.812267
