MCOM May 2018
Mobile Communication Mumbai University.
Semester 7.
Q1) If a total of 33 MHz of bandwidth is allocated to a particular FDD cellular telephone system which uses two 25 kHz simplex channels to provide full duplex voice and control channels, compute the number of channels available per cell if a system uses (a) four-cell reuse, (b) seven-cell reuse, and (c) 12-cell reuse.
Q2) Consider a cellular system in which total available voice channels to handle the traffic are 960. The area of each cell is 6Km2 and the total coverage area of the system is 2000Km2. Calculate
The system capacity if the cluster size, N = 4
The system capacity if the cluster sizes, N = 7
How many times would a cluster of size 4 have to replicated to cover the entire cellular area? Does decreasing the reuse factor N increase the system capacity? Justify your answer.
Q3) A Base station has a 900 MHz transmitter and a vehicle is moving at the speed of 50 kmph. Compute the received carrier frequency if the vehicle is moving.
(i) Directly towards the BS,
(ii) Directly away from the BS,
(iii) In a direction that is 60 degree to the direction of arrival of the transmitted signal?
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