12) (5 points) Explain the principle of frequency reuse and frequency reuse factor in the context of a cellular system. Derive the number of channels available per cell for a frequency reuse factor of 4 and 7 in a cellular system having a total of 33 MHz of bandwidth and using two 25-kHz one-way links to provide one two-way voice channel.
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This allows for efficient utilization of the limited frequency resources and enables multiple users to communicate simultaneously without interference. The frequency reuse factor (FRF) is a measure of how many times a given frequency can be reused within a Show more…
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Problem 4 (12 marks): Consider a cellular system comprising 32 cells (figure below, left) with a cell radius of 1.6km, a total frequency bandwidth that supports 336 traffic channels, and a reuse factor of N = 7. a) Find the exact geographical area covered by the system, the number of channels per cell, and the number of concurrent calls that can be handled over the total area. b) Repeat part a) for a system comprising 128 cells with cell radius of 0.8km (figure, right). c) Briefly explain and illustrate the concepts of cell splitting and cell sectoring, which can be used to increase the number of simultaneous channels in the above systems.
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