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

Answer 1

[vidyesh]

Hi Firas,

To add awgn to the signal, you can use the 'AWGN' block:

https://www.mathworks.com/help/comm/ref/awgnchannel.html

The AWGN block expects the 'SNR' in dB. For conversion from EbNo to dB please refer the below links:

1) convertSNR function: https://www.mathworks.com/help/releases/R2024a/comm/ref/convertsnr.html?searchHighlight=convertsnr&s_tid=doc_srchtitle

2) AWGN Channel: https://www.mathworks.com/help/comm/ug/awgn-channel.html