科研之友
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摘要
Electromagnetic methods play an important role in the exploration of metal ore mineral, oil and gas resources. It is very difficult to obtain a high signal to noise ratio with increasingly strong electromagnetic noise using conventional anti-noise methods. In recent years, the pseudo random sequence attracts a lot of attention because of its anti-noise performance. This paper describes two common methods used to extract the impulse response from the pseudo-random sequence response. Studies have shown that the two methods are capable to get high precision impulse response without noise. The extraction accuracies of the results using the two methods were compared with data contained in the noise, that shows that the results of method 2 is better than 1, then the reasons for this situation was analuzed. Finally, a study is made to improve the ability of the anti-pseudo-random sequence of the methods, including to improve the order of the pseudo-random sequence, use a different encoding, change the number of cycles in order to achieve the purpose of noise suppression.
- 出版日期2016-5
- 单位东华理工大学; 中国科学院地质与地球物理研究所兰州油气资源研究中心; 中国科学院地质与地球物理研究所
