How to add awgn to gfsk?

Hi everyone,

I am trying to add awgn to gfsk signal using simulink, and I have the following architecture:

BPSK -> RRC -> FM Broadcast modulator -> AWGN

RRC: 8 samples per symbol FM Broadcast Modulator: audio sampling rate=40e3, sampling rate=200e3, deviation=75e3.

My question is, what should be the symbol time for the awgn if I am using EbN0 mode?

Thanks

[Jason Chang]

Excuse me, I have trouble in making a GFSK signal.

Would you like to tell me how you build the GFSK block in Simulink?

Thanks