Low frequency electromagnetic signals play an important role in the detection of underground electrical structure. After propagation of long distance, signal will be attenuated to a certain extent and probably buried in noise, make it difficult to extract. In this paper, the method of multi-layer autocorrelation will be used to detect and extract the weak low frequency electromagnetic signal, and its performance will be compared with the narrow-band filter and the method of synchronous accumulation. Simulation results show that the correlation coefficient of signal obtained by multi-layer autocorrelation and source signal can achieve more than 0.8 when SNR is -18dB. However, the value of narrow-band filter and synchronous accumulation is lower than that mentioned above when SNR is only -14dB. Experimental verifies that multi-layer autocorrelation method can suppress noise more effectively and detect weak signals more accurately.
목차
Abstract 1. Introduction 2. The Basic Principle of Weak Signal Extraction 2.1 Multi-Layer Correlation 2.2 Narrowband Filter and Synchronous Accumulation 3. Simulations and Performance Analysis 3.1 The Comparison of Time-Domain Waveform 3.2 The Comparison of Frequency Spectrum 3.3 The Comparison of Correlation Coefficient 4. Conclusions Acknowledgements References
키워드
Weak signal detetionMulti-layer autocorrelationNarrow-band filterSynchronous accumulation
저자
Zheng Dou [ College of Information and Communication Engineering Harbin Engineering University, Harbin, China ]
Yu Tao [ College of Information and Communication Engineering Harbin Engineering University, Harbin, China ]
Yun Lin [ College of Information and Communication Engineering Harbin Engineering University, Harbin, China, Department of Electrical Engineering Wright State University, Dayton, Ohio, U.S. ]
Corresponding Author
Zhiqiang Wu [ Department of Electrical Engineering Wright State University, Dayton, Ohio, U.S. ]
Dong Li [ Department of Electrical Engineering Wright State University, Dayton, Ohio, U.S. ]
Zhiping Zhang [ Department of Electrical Engineering Wright State University, Dayton, Ohio, U.S. ]
보안공학연구지원센터(IJSIP) [Science & Engineering Research Support Center, Republic of Korea(IJSIP)]
설립연도
2006
분야
공학>컴퓨터학
소개
1. 보안공학에 대한 각종 조사 및 연구
2. 보안공학에 대한 응용기술 연구 및 발표
3. 보안공학에 관한 각종 학술 발표회 및 전시회 개최
4. 보안공학 기술의 상호 협조 및 정보교환
5. 보안공학에 관한 표준화 사업 및 규격의 제정
6. 보안공학에 관한 산학연 협동의 증진
7. 국제적 학술 교류 및 기술 협력
8. 보안공학에 관한 논문지 발간
9. 기타 본 회 목적 달성에 필요한 사업
간행물
간행물명
International Journal of Signal Processing, Image Processing and Pattern Recognition
간기
격월간
pISSN
2005-4254
수록기간
2008~2016
십진분류
KDC 505DDC 605
이 권호 내 다른 논문 / International Journal of Signal Processing, Image Processing and Pattern Recognition Vol.9 No.4