Noise Suppression Algorithm for Ocean Magnetic Anomaly Detection

Chunjiao FEI; Qunying ZHANG; Peilin WU; Guangyou FANG; Wanhua ZHU; Xin XU

doi:10.11999/JEIT180026

Volume 40 Issue 11

Oct. 2018

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Article Navigation > Journal of Electronics & Information Technology > 2018 > 40(11): 2779-2786

Chunjiao FEI, Qunying ZHANG, Peilin WU, Guangyou FANG, Wanhua ZHU, Xin XU. Noise Suppression Algorithm for Ocean Magnetic Anomaly Detection[J]. Journal of Electronics & Information Technology, 2018, 40(11): 2779-2786. doi: 10.11999/JEIT180026

Citation:

Chunjiao FEI, Qunying ZHANG, Peilin WU, Guangyou FANG, Wanhua ZHU, Xin XU. Noise Suppression Algorithm for Ocean Magnetic Anomaly Detection[J]. Journal of Electronics & Information Technology, 2018, 40(11): 2779-2786. doi: 10.11999/JEIT180026

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Noise Suppression Algorithm for Ocean Magnetic Anomaly Detection

doi: 10.11999/JEIT180026

Chunjiao FEI^{1, 2, 3},
Qunying ZHANG^{1, 2
,
,},
Peilin WU^{1, 2, 3},
Guangyou FANG^{1, 2},
Wanhua ZHU^{1, 2},
Xin XU^{1, 2}

1.
Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China
2.
Key Laboratory of Electromagnetic Radiation and Sensing Technology, Beijing 100190, China
3.
University of Chinese Academy of Sciecces, Beijing 100049, China

Received Date: 2018-01-09
Rev Recd Date: 2018-04-23

Available Online: 2018-05-10

Publish Date: 2018-11-01

Abstract

Abstract

Marine magnetic anomaly detection is one of the basic means of marine scientific observation, exploration of undersea resources, national defense and security. However, the complexity of the magnetic field noise increases the difficulty of the magnetic detection. It is of great significance to study various magnetic field noise mechanisms and suppression methods for the improvement of measurement accuracy. In this paper, the wave magnetic field model under general and infinite depth conditions is used to estimate the noise induced by sea waves respectively. The wave and geomagnetic noise in the magnetic anomaly signal is filtered out by the combination of spectral subtraction and wavelet. In order to verify the validity of the algorithm, the ocean magnetic field in a sea area of South China Sea in August 2015 is observed. The results show that this method can filter out most of the wave and geomagnetic field noise. The wave distribution in the frequency range of 0.4～0.8 Hz is obviously reduced, the waveform in the time domain is greatly improved, the magnetic anomaly signal of the target is highlighted. Signal to noise ratio can be increased by nearly 11 dB. The proposed method has the advantages of low computational complexity, strong real-time performance and easy implementation, which can provide an effective measure for noise suppression of marine magnetic anomaly detection.
- Marine magnetic anomaly detection,
- Wave induced magnetic field model,
- Spectral subtraction,
- Wavelet analysis

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References(15)

References

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