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INSTANTANEOUS FREQUENCY AND TIME-FREQUENCY DISTRIBUTIONS
瞬时频率和时频分布

Keywords: Instantaneous frequency,Time-frequency distribution,Adaptive signal processing
瞬时频率
,时频分布,自适应信号处理

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Abstract:

The concept of instantaneous frequency(IF) and its traditional construct method - analytic method are introduced in this paper. Then by means of joint time-frequency analysis, the physical meaning of IF and its relation with the time-frequency distributions are also discussed. It is pointed out that one of the destinations of 2-D time-frequency distributions is to estimate the IF, and the different distribution can be of different effect. The performances of several popular distributions are compared, consequently AOP method is found to be a suitable one to estimate the IF.

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