QAM transmission with raised-cosine filtering The bandwidth BT of the raised-cosine filter is defined by 2W
f1 ¼ W(1þ). A computer outputs binary data at the rate of 56 kb/s. The computer output is transmitted using a baseband 16-QAM system that is designed to have a raisedcosine spectrum. Determine the transmission bandwidth required for each of the following rolloff factors: ¼0.25, 0.5, 0.75, 1.0.