MATLAB Examples

Modulate and Demodulate 8-PSK Signal

Open the 8-PSK model. The model generates an 8-PSK signal, applies white noise, displays the resulting constellation diagram, and computes the error statistics.

Run the model.

The error statistics are collected in vector ErrorVec. Because Eb/No is 15 dB, there are no measured symbol errors.

Number of symbol errors = 0

Change the Eb/No of the AWGN Channel block from 15 dB to 5 dB. The increase in the noise is shown in the constellation diagram.

Because of the increase in the noise level, the number of symbol errors is greater than zero.

Number of symbol errors = 13