A method for estimating the instantaneous frequency of complex main signals
A technology of instantaneous frequency and main signal, which is applied in the direction of frequency measurement device, DC motor deceleration device, motor parameter estimation/correction, etc. It can solve the problems of lack of time resolution and impracticality
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[0049] A complex adaptive phase detector (PD), as proposed in certain aspects of the present disclosure, is an adaptive filter that accurately estimates the instantaneous frequency of a dynamic complex signal. In a dynamic complex signal environment, PD can exhibit accurate instantaneous frequency estimation and fast convergence even when the input frequency changes rapidly. Complex adaptive PDs can support local processing of complex signals to extract accurate instantaneous frequency estimates of complex exponential components in a flexible and computationally efficient form. The adaptive structure and means are unique and have broad applicability in many application fields.
[0050] The indirect PD structure can iteratively adjust the complex coefficients by minimizing the magnitude of the complex error signal to estimate the instantaneous frequency of the complex main signal. By extracting the phase of the complex coefficients, the instantaneous frequency can be estimated...
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