随钻测井线性调频信号的数值模拟

2012 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition Pub Date : 2012-10-04 DOI:10.1109/IWEM.2012.6320377

K. Zhu, Z. Nie, Xiangyang Sun

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引用次数: 1

摘要

本文利用NMM和FFT对随钻测井中作为传输信号的LFM信号在噪声环境下进行了数值模拟。基于LFM信号的频谱，利用NMM和FFT对接收线圈的接收信号进行了计算。然后，通过匹配滤波器对接收信号进行脉冲压缩，显著提高了峰值信噪比。利用峰值处两个接收线圈的幅值比和相位差得到测井曲线。仿真结果表明，该方法能较好地提高信噪比，特别是对单载波信号中难以抑制的相关噪声。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Numerical simulation of Linear frequency modulation signal in Logging while drilling

In this paper, the LFM signal as transmitted signal under noisy environment in LWD has been modeled numerically by using NMM and FFT. Based on the frequency spectrum of LFM signal, the NMM and FFT are used to calculate the received signals of receiving coils. Then, matched filter realize pulse compression of the received signals, and the peak signal to noise ratio (PSNR) is improved significantly. Well logging curves are obtained by making use of the amplitude ratio and the phase difference of two receiving coils in the peak point. The simulation results indicate that this method can strongly improve the SNR, especially for the correlated noise which is hardly restrained in single carrier signal.

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2012 IEEE International Workshop on Electromagnetics: Applications and Student Innovation Competition

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