时－频联合信号分析法能描述非稳态信号的频率如何随时间而变化，故它能使我们更好地理解信号的本质。本文简要介绍了这种方法，说明了它的优点，并列举了它在海洋资料处理中应用的一个实例 The time-frequency joint signal analysis can describe how the frequency of unsteady signals changes over time, so it gives us a better understanding of the nature of the signal. This article presents a brief introduction to this approach, illustrates its advantages, and cites an example of its use in ocean data processing