SIR in a cellular network with a reuse factor of 7 A cellular network with a frequency reuse factor of 7 is depicted in Figure 7.12, where cells with the same letter share the same set of frequencies. In this system, mobiles communicate with base stations through two 25-kHz simplex channels, and a total of 66 MHz of bandwidth is available.

(a) How many mobiles can each cell support in this system?

(b) Using the same assumptions as in Example 7.1, find the worst SIR that the base station can experience resulting from two users in different cells.

(c) Compute the worst SIR ratio that the mobile can experience resulting from two base stations.