Malcolm, William; Elliott, Robert J
In certain models for communications signals, such as Quadrature Amplitude Modulation (QAM), circular stochastic processes arise quite naturally. However, much of the literature concerning estimation for communications processes, such as QAM signals, is based upon Cartesian coordinate representations and approximated dynamics, subsequently amenable to the Extended Kalman Filter (EKF). This common approach, using EKFs, is well known to be unstable, for example, in demodulating a QAM signal, one...[Show more]
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