Alistu, in each theory book there is is mentioned that the MSK is continuous phase frequency shift keying, from that only i said the phase is continuous, if at the constellation diagram the points are distinct and not connected in circular pattern then there must have been a phase shift whether it is 8PSK or 32PSK where we can see atleast some degree of phase shift, I have some doubt what kind of constellation there should come in case of MSK. whatever constellation i have seen till now has some amount of phase shift. I still confused in CPFSK what exactly the continuous phase means. from waveform point of view I am clear about that but in case of constellation I am still confused. In case of continuous phase minimum shift keying waveform we Notice that when the output frequency changes, it is a smooth, continuous transition. Consequently, there are no phase discontinuities. I also found that CPFSK has a better bit error performance than a conventional
binary FSK for a given signal to noise (SNR) ratio. so i am very much interested in MSK transmitter and receiver design.
Thanks
Regards