Bandwidth depends on the type of Modulation technique used.
RF Bandwidth/bit= (1+alpha)/S
alpha is the filter coefficient
S= symbol rate.
for Eg: calulate the total RF bandwidth required by a DMR to transmit 16E1s(32.768Mbps) using QPSK modulation? assume alpha=0.3
for QPSK S=2
RF Bandwidth/Bit= (1+0.3)/2
total bandwidth required for transmiting 32.768Mbps= 0.65*32.678