›› 2014, Vol. 27 ›› Issue (11): 109-.

• 论文 • 上一篇    下一篇



  1. (中国船舶重工集团公司第710研究所 磁学研究中心,湖北 宜昌 443003)
  • 出版日期:2014-11-15 发布日期:2014-11-19
  • 作者简介:杨勇(1985—),男,硕士研究生。研究方向:信号与信息处理,磁性目标探测与定位。E-mail:csic_yangyong@sina.com

Application of Low Pass Filter and Orthonormalized Functions Decomposition Algorithm in Magnetic Target Detection

YANG Yong,CHE Zhen,SHI Chao   

  1. (Magnetic Research Center,No.710 R&D Institute,CSIC,Yichang 443003,China)
  • Online:2014-11-15 Published:2014-11-19



关键词: 低频信号, 磁异常探测, 信噪比, 约束最小二乘FIR滤波器, 正交基分解


Magnetic anomaly signal of magnetic target is low frequency signal by the analysis of time and frequency characteristic and SNR is low in magnetic anomaly detection.A new algorithm is proposed using FIR low-pass filter integrated into orthonormalized functions decomposition algorithm.Firstly constrained least square FIR filter is designed to filter the high frequency noise in the raw signal by the analysis of filter characteristic.Then the disposed signal is decomposed by orthonormalized functions decomposition algorithm to increase SNR.The simulation result demonstrates the method can filter the high frequency noise and increase the SNR to improve the detection ability of magnetic objects.

Key words: low frequency signal;magnetic anomaly detection;SNR;constrained least square FIR filter;orthonormalized functions decomposition algorithm


  • TN713