Ns = 20;
fs = 1e3;
data = randi([0 3],131072,1);
modSig = pskmod(data,4,pi/4);
sps=4;
txfilter =  comm_RaisedCosineTransmitFilter('OutputSamplesPerSymbol',sps);
txSig = txfilter(modSig);
eyediagram(txSig, 2*Ns,4/fs,10,'r');