基于时频分析的随钻源信号盲分离方法初探——祝贺《油气地球物理》创刊10周年  

The blind separation method of the source signal while drilling based on the time-frequency analysis

作　　者：王成礼[1] 李蓉艳[2] 

机构地区：[1]胜利石油管理局地球物理勘探开发公司,山东东营257086 [2]同济大学电子与信息工程学院,上海201804

出　　处：《油气地球物理》2013年第1期20-26,共7页Petroleum Geophysics

摘　　要：本文将时频分析与时延估计合理地结合起来,实现随钻源信号的估计。方法的出发点是源信号的瞬时频率估计。利用时延估计算法来估计地震反射道响应,使得局限于时间域的盲处理问题扩展到二维的时频平面,信号的时、频特征得到分离。由于RGK分布对噪声敏感度小,从而得到合适的"模型函数"来重构源信号。理论模型的试算证明了方法的有效性。The time-frequency analysis is reasonably combined with the delay estimation to realize the estimation of the source signal while drilling. The departure point of the method is the estimation of instantaneous frequency of the source signal. The estimation of seismic reflection trace response with the delay estimation make the blind pro- cessing within the limits of the time domain extend to 2D time-frequency plane, the characteristics of the time and the frequency of the signal are separated finally. The applicable ＂model function＂ are obtained to reconstruct the source signals as the distribution of the RGK has a little sensitivity to the noises. The trial calculation of the theoretical model demonstrated validity of the method.

关 键 词：源信号 盲分离 径向高斯核 信号重构 

分 类 号：TN911.6[电子电信—通信与信息系统]