the one-way bandwidth available to a single operator in the AMPS system is 12.5 MHz with a channel bandwidth of 30 kHz and 21 control channels. We would like to
calculate the efficiency with which this system utilizes bandwidth for a particular installation. Use the following parameters:
Cell area = 8 km2
Total coverage area = 4000 km2
Frequency reuse factor = 7
Average number of calls per user during the busy hour = 1.2
Average holding time of a call = 100 s
Call blocking probability = 0.02
a How many voice channels are there per cell?
b Give the total holding time within one hour for each cell is 46 h, calculate the number of calls/hour/cell and the number of calls/hour/km2.
c Calculate the number of users/hour/cell and the number of users/hour/channel.
= (Total traffc carried by the system)/(Bandwidth)(Total coverage area)
Determine the modulation efficiency for this system.
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