Apparatus and method for detecting single frequency multiplier, method for detecting single frequency, and phase shift detecting device and phase shift detecting method

摘要

Problem to be solved: to detect whether or not the input signal is a single frequency signal by one detecting circuit so that the frequency can be detected.The present invention comprisesOf the past two discrete signals continuous to the input input discrete signalA first signal obtained by multiplying the previous first discrete signal by a coefficientBased on the second signal obtained by multiplying the second discrete signal immediately before the first discrete signal by a constantGenerates prediction signals for input discrete signalsA prediction residual signal is generated by taking the difference between the input discrete signal and the prediction signal.The coefficient of the adaptive filter coefficient is updated using the prediction residual signal.By converging the coefficient to a certain value,The input signal is determined as a single frequency signalThe frequency is obtained based on the coefficient.Diagram