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Reply To: Bandwidth


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
= 0.65Hz

total bandwidth required for transmiting 32.768Mbps= 0.65*32.678
= 21.3Mhz.