本文讨论了提高信号频谱的频率分辨率的方法。文中采用了复调制、低通滤波以及重新采样等处理方法,得到了高分辨率的频谱函数。文中采用的滤波器阶数较低,这将使滤波处理速度加快。程序设计上采取有效措施,使存贮容量减少一倍。而且文中所述程序还兼有用软件改变信号采样频率的能力。文中指出对标准信号所做的实验,精确度已满足要求。 This article discusses ways to improve the frequency resolution of the signal spectrum. In this paper, complex modulation, low-pass filtering and resampling methods are used to obtain high-resolution spectral functions. The filter used in this paper has a lower order, which will speed up the filtering process. Program design to take effective measures to double the storage capacity. And the procedures described in the article also have the ability to change the signal sampling frequency with software. The article pointed out that the experiment done on the standard signal, the accuracy has to meet the requirements.