稳定有效的反Q滤波方法

反Q滤波是补偿大地吸收衰减有效方法之一,其稳定性和有效性是反Q滤波的前提条件.笔者研究了一种稳定的反Q滤波方法,并通过理论模型和实际数据与传统的增益限制反Q滤波方法进行了对比.结果表明:稳定反Q滤波更好地恢复了衰减的地震信号,并自动限制了对噪声的过渡放大.同时,还分析了噪声和增益限制因子G_(lim)对稳定反Q滤波的影响.

RESEARCHES ON STABILIZED AND EFFECTIVE INVERSE Q FILTERING

The inverse Q filtering is one of the most effective method for tackling the earth attenuation. Stability and efficiency are two problems of general concern in inverse Q filtering. In this paper, a stabilized inverse Q filtering was implemented and compared with the conventional gain-limited inverse Q filtering by theoretical model and actual seismic data. The results show that the stabilized inverse Q filtering can recover effectively the attenuation of the seismic data and restrict intelligently the attempt to amplify the ambient noise. At the same time, the effects of noise level and specified gain limit Glim on the stabilized inverse Q filtering are also analyzed in this paper.