Designing triangular filters for Continuous Phase Modulation (CPM) receivers

A novel filter design method has been proposed for implementing linear Continuous Phase Modulation receivers. The design is based on the observation of all possible waveform tracks at the receiver. A piece-wise approximation is subsequently used to obtain a triangular filter which can be efficiently implemented in hardware. The resulting filters have shown excellent bit error rate performances in comparison with the existing CPM receivers. For improved bit error rate performances a modified CPM frequency pulse is also proposed.