鉴于数字信号处理器(DSP)的迅速发展,本文提出了一种计算式测频方法。该方法可根据采样幅值计算出待测频率,并与自适应滤液器和参数平滑技术相结合,从而可在信噪比较低和存在其他线谱干扰的情况下实现信号频率的精测。计算机仿真和实际的工程使用已证明了它的有效性。该方法在水声和其他通信系统中具有一定的应用价值。 In view of the rapid development of digital signal processor (DSP), this paper presents a computational frequency measurement method. This method can calculate the measured frequency according to the sampling amplitude and combine it with the adaptive filter and parameter smoothing technique to finely measure the signal frequency with low signal-to-noise ratio and other line spectrum interferences. Computer simulation and actual engineering use have proven its effectiveness. The method has certain application value in underwater acoustic and other communication systems.