信号分析中的预测技术在地震勘探中得到了广泛的应用，一维预测滤波能消除鸣震等具有周期性的干扰波，但对随机干扰则无能为力。针对这一困难，最近几年出现了F－X域二维预测滤波。该方法是将时间信号变到频率域，对每一频率信号横向上进行预测，由于有效波横向上是相对连续的，而随机干扰在横向上是不相关的，因而能有效地消除随机干扰。 Prediction techniques in signal analysis have been widely used in seismic exploration. One-dimensional prediction filtering can eliminate periodic interference waves such as acoustic shocks, but can not do any random disturbance. In response to this difficulty, F-X domain two-dimensional predictive filtering has appeared in recent years. In this method, the time signal is changed to the frequency domain, and the signal of each frequency is predicted laterally. Since the effective waves are relatively continuous laterally and the random disturbances are uncorrected laterally, the random disturbance can be effectively eliminated.