In the existing AMPS system the service provider owns 395 duplex voice channels
ID: 2248547 • Letter: I
Question
In the existing AMPS system the service provider owns 395 duplex voice channels in 12.5MHz of bandwidth in each direction and they use a frequency reuse factor of K=7.
a) Determine the number of voice channels per cell.
b) What would be the number of voice channels per cell if the service provider uses an underlay-overlay deployment with K=3 for the inner cells?
c) Determine the number of voice channels per cell if the service provider replaces the AMPS with a GSM system using K=4.
d) Repeat (c) for IS-95 CDMA
e) What are the number of subscribers for each system if the service provider owns 150 cell towers and intends to maintain the blockage rate at 2%.
Explanation / Answer
Given
Duplex voice channels = 395
Bandwidth = 12.5MHz
Frequency reuse factor (K) = 7
a) No of Channels per cell =395/ 7 = 56