QPSK design for FPPA

Good day.

Has anyone ever designed a QPSK/BPSK or any other modulator/demodulator on a FPGA.

I know the basic functionality of the modem, but what implementation tips are there, or examples of pure VHDL code for this.

I know about megacore functions. Im looking for examples of someone that has maybe done this.

once I get it together ill post is.