Hi All,
Does anyone have a mathematical derivation of the expected spectrum of a QPSK signal, given a known symbol rate (which is 1/2 the data rate for QPSK)?
The signal i am measuring doesn't have any sideband carrier suppression at all, which is supposed to be a figure of merit for phase and amplitude imbalance of your IQ mixer (how orthogonal or in-quadrature the I and Q channels are).
Thanks for any REAL help (which is Info from someone who isn't pretending to know more than they actually do!).
Slick