电波科学学报2018，Vol.33Issue(1)：48-55,8.DOI:10.13443/j.cjors.2017101201
微弱信号非线性检测在随钻电磁波中的应用
Application of weak signal nonlinear detection on MWD electromagnetic wave
李富凯 1杨志强 1郝纯1
作者信息
- 1. 中国电波传播研究所, 新乡 453000
- 折叠
摘要
Abstract
In the electromagnetic wave logging engineering, as the depth of exploration deepens, the signal goes weaker and weaker. Therefore, the effective extraction of weak electromagnetic signals in the strong noise background is of great significance for guiding the exploration while drilling. The traditional filtering methods only filter the out-of-band noise, not the in-band noise. Therefore, this paper designs an out-of-band hardware filter circuit and in-band adaptive line enhancement (ALE) algorithm that based on the least mean square algorithm to construct the combination filtering algorithm. Theoretical analysis and simulation show that this algorithm can improve the calculation accuracy of weak signal with high dynamic range and low signal to noise ratio (SNR), effectively enhancing SNR and noise suppression ability. In addition, to filter the out-of-band noise, the in-band Gaussian white noise rejection is improved by about 10 dB in this algorithm, which helps to solve the actual engineering problem. 关键词
随钻电磁波/微弱信号检测/滤波电路/自适应增强/可变参数Key words
MWD electromagnetic wave/weak signal detection/filtering circuit/adaptive enhance/variable parameter分类
信息技术与安全科学引用本文复制引用
李富凯,杨志强,郝纯..微弱信号非线性检测在随钻电磁波中的应用[J].电波科学学报,2018,33(1):48-55,8.
