吉林大学学报(工学版) ›› 2016, Vol. 46 ›› Issue (6): 2128-2136.doi: 10.13229/j.cnki.jdxbgxb201606050
• • 上一篇
周逢道1, 2, 王爽1, 韩思雨1, 徐飞1, 连士博1, 孙彩堂1, 2
ZHOU Feng-dao1, 2, WANG Shuang1, HAN Si-yu1, XU Fei1, LIAN Shi-bo1, SUN Cai-tang1, 2
摘要: 基于传统正交检测算法在以方波作为激励场源的可控源电磁探测信号幅度与相位提取的不足之处,提出了改进型的正交检测算法。分析了改进型正交检测算法的实现过程,讨论了高通特性大地介质的影响,并针对这些特点,设计了匹配的低通滤波器和降采样率的采样方法,保证了改进型正交检测精度。实测结果表明:改进型正交检测算法具有可行性,且相对于正弦正交检测的幅度误差为0.01%~0.72%,相位误差保证在4°的范围内;相对于方波正交检测算法,检测精度至少提高了一个数量级。改进型正交检测算法在对数据量较大的时域采集信息进行处理时,因无需进行乘法运算、实时性较高、具有较低的硬件要求,且能抑制高通特性大地介质的影响,而在可控源电磁探测中具有良好的应用前景。
中图分类号:
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