Estimating Parameters of Combined AM and PM Signals Using Prior Information

A method for estimating parameters of combined amplitude and phase modulation signals from digital sampling data is proposed. It can be employed with advantage to analyze combined modulation functions of commercial function generators. Though this problem of inference has applications in communication technology, it has also become a concern to the power industry in issues related to phasor measurement unit tests. Prior information available to metrologists about the signal components allows the reduction of the dimensionality of the search algorithm with consequent time savings.