中文摘要：

简述了信号处理及频率估计发展,从方法研究和应用研究两方面,对笔者10余年来专注的复杂信号频率估计研究进行了回顾和总结,并展望了复杂信号频率估计的发展趋势。方法研究主要有短时异频信号的频谱融合、端频信号的频率估计、时变信号的频率跟踪和非平稳信号的瞬时频率估计;应用研究重点以科氏流量计和LFMCW雷达为平台,利用方法研究的成果以提高仪表和装置的性能。

英文摘要：

Development of signals process and frequency estimation has been introduced briefly in this paper. Emphasis is laid on the review and summary of our studies on complicated signals frequency estimation in the past decade, which can be concluded as method studies and application studies. And partial prospects of complicated signals frequency estimation are put forward. The method studies include spectral fusion of short signals with different frequency, frequency estimation of signals with extreme frequency, variable frequency tracking and instantaneous frequency estimation of non-stability signals. The application studies focus on Coriolis mass flow meter and LFMCW radar. Performances of the two instruments are both improved by using these methods.