How to generate QPSK signal?
The QPSK signal is generated by phase-shifting the carrier. This applies for any carrier frequency. All symbol transitions are possible. I/Q Signals of quadrature modulation.
How do you create a carrier signal in Matlab?
y = ammod( x , Fc , Fs ) returns an amplitude modulated (AM) signal y , given the input message signal x , where the carrier signal has frequency Fc . The carrier signal and x have a sampling frequency Fs .