This letter presents the solution for decomposing continuous-phase modulated (CPM) signals with integer modulation index into pulse-amplitude modulated components. The notion of main complex pulse is also introduced. A simplified demodulator for CPM signals with integer modulation index is proposed as an application example and simulation results using a quaternary 2 raised cosine (RC) scheme are given.
- Continuous phase modulation (CPM)
- Integer modulation index
- Pulse-amplitude modulated (PAM) decomposition