Transmit:

cos(2p f_c t)

I(t) cos(2p f_c t) + Q(t) cos(2p f_c t)

= R(t) cos(2p f_c t + f)

I-Q phase trajectory

As a function of time, I and Q follow a certain trajectory through the complex plane

www.WirelessCommunication.NL © Jean-Paul M.G. Linnartz, 1993, 1995.