Introduction - If you have any usage issues, please Google them yourself
In accordance with the following requirements of eye respectively, the input modulation mode is 2PAM and 4PAM, the symbol rate is 1Hz, the equivalent channel filter for raised cosine shaping filter (default roll off factor of 0.5):
1) additive Gauss white noise with noise free and signal to noise ratio of 20dB
2) raised cosine roll down coefficients are 0.5 and 1, respectively
3) affected by intersymbol interference, the channel parameters can be set as follows: ch=[0.9806; -0.1961];