Time-Frequency Rate Representation for IF Rate Estimation of Signals with Fast Varying Phase Function

摘要

An efficient approach for instantaneous frequency (IF) rate estimation is proposed. It is based on a time-frequency rate representation with complex-lag argument. The proposed representation is derived in a manner to reduce the spread factor, and thus to provide high concentration along the IF rate. Due to the significantly reduced spread factor, it is suitable for periodically frequency modulated signals whose phase vary fast even within a few samples. The theory is proven by the example.