Modulated waveform generation

Hi,

I want to test my mixer and PA with different types of modulated waveforms. I need some help as to how I can generate these modulated waveforms in Cadence, their eye diagram etc.

Thanks a lot!

Let me be a bit more specific. I want to generate OFDM signals (say QAM modulation) in CADENCE to test spectral regrowth of my power amplifier for 802.11a system. If anybody could please help on how to generate OFDM signals, then it would be very helpful!
Thanks a lot!