Sine of the signal in Xilinx Simulink

I am implementing a DQPSK modulator and Demodulator. I would like to calculate the exp(1j*Phase) in Simulink.

How can I realize such a model ?

Here is the part of the model to calculate the Phase:

Incidentally, ROM3 block in the model stores the values: 0, pi/2, pi, 3*pi/2 ( Constellation p开发者_开发问答oints)

Two options for implementing sin(x) in an FPGA:

• lookup table
• CORDIC

I have no idea how you would link these with your Simulink model.