whlinfei
Member level 2
Hi,
I am doing Power amplifier design.
In many PA papers, QPSK is considered as a non-constant envelope signal.
But from its waveform, it seems it's constant-envelope.
Some books say the filtered QPSK is non-constant envelope.
Even in that case, how is the signal demodulated given that the demodulator simply times the singal with sine and cosine, without any use of amplitude information?
Thanks in advance.
Best Regards,
whlinfei
I am doing Power amplifier design.
In many PA papers, QPSK is considered as a non-constant envelope signal.
But from its waveform, it seems it's constant-envelope.
Some books say the filtered QPSK is non-constant envelope.
Even in that case, how is the signal demodulated given that the demodulator simply times the singal with sine and cosine, without any use of amplitude information?
Thanks in advance.
Best Regards,
whlinfei