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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