The AEgis Technologies Group
Among the oldest and most fundamental topics in communication theory is blind signal parameter estimation, about which so much has been written, an exhaustive reference list is impossible. The authors revisit one of the simplest problems: the demodulation of a baud-sampled M-ary Phase Shift Keyed (MPSK) signal with unknown symbol-sequence, amplitude and phase in Additive White Gaussian Noise (AWGN). They consider this problem because its solution acts as a fundamental building block applicable to many different communication problems. The estimator is called blind because the symbol sequence is a priori unknown.