The Application of Cross-Correlation Algorithm in CSAMT Received Data Processing

Abstract:

Controlled source audio-frequency magnetotelluric method (CSAMT) is an effective frequency domain detecting method in metallic ore exploration. In view of the weak response of a deep target signal and the serious measuring environmental noise,this paper proposes a method to deal with the noise of the CSAMT data based on the theory of cross-correlation algorithm. Emission signal current waveform recorder is designed to record signal parameters.According to cross-correlation technology, this paper uses the characteristics that correlation between emission and received signals is strong, yet the correlation between emission signals and random noise is weak, to deal with emission signals and received signals by cross-correlation ,in order to filter out random noise and other jamming signals.Field exploration test data processing contrast results show that the method can suppress noise signal, and improve the CSAMT measuring accuracy.

• Periodical: Advanced Materials Research (Volumes 989-994)
• Pages: 2278-2282
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.989-994.2278
• Online since: July 2014
• Authors: Zi Ping Zhou*, Yu Zhu, Tian Hao Wang
• Keywords: Cross-Correlation Processing, Csamt, Emission Signal Current Waveform Recorder, Measuring Accuracy, Random Noise

References

[1] Xu Guang-chun. Several Problems in CSAMT Method in Practical Application[J]. GEOPHYSICAL &GEOCHEMICAL EXPLORATION, 2011, 35(6): 809-812.

[2] Zhang Wen-xiu, Lin Jun, Liu Li-chao, Hu Rui-hua. Design and implementation of broadband data acquisition system for distributed electromagnetic exploration[J]. Journal of Jilin University (Engineering and Technology Edition, 2012, 42(6): 1426-1431.

[3] Chen Ru-jun, Luo Wei-bing, He Ji-shan, Bai Xuan-cheng, Tang Jing-tian. High precision multi-frequency electrical method data acquisition system[J]. GEOPHYSICAL &GEOCHEMICAL EXPLORATION, 2003, 27(5): 375-378.

[4] Xu Xia, Lei Ming. Design of data communication system based on CY7C68013[J]. Micro-computer information（IEEE and SOC），2009, 25（6-2）：198-200.

[5] Liu Yu-hai, Yin Cheng, Pan Shu-lin, Hu Yong-quan. Method based on cross-correlation function of the ground micro seismic signal detection research[J]. GEOPHYSICAL PROSPECTING FOR PETROLEUM, 2012, 51(6): 633-637.