Detection of continuous-phase modulated (CPM) signals with artificial neural networks

A coherent receiver for CPM signals with RC (raised-cosine) pulse shaping is introduced. The receiver mainly consists of a multilayer ANN (artificial neural network) that evaluates the first derivative of the phase of the IF (intermediate frequency) signal. After training the ANN transforms the signal phase into the appropriate digital symbols. Further an easy to implement symbol synchronisation scheme is introduced. The symbol synchronisation also exploits the differentiated phase of the received signal. Therefore, the coherent receiver, does not need any extra synchronisation signal. Both applications are described in detail and a performance analysis is presented