Question: For a duplex wireless cellular communications system, the total available bandwidth is 30 MHz, wherein each simplex channel has 20 kHz RF bandwidth. Determine

For a duplex wireless cellular communications system, the total available bandwidth is 30 MHz, wherein each simplex channel has 20 kHz RF bandwidth. Determine the number of duplex channels and total number of channel per cell site for cell reuse N = 3. (3 marks) (b) For a digital cellular system, the worst case signal to interference ratio is 15 dB. Determine the optimal value of 'N' when co-channel interfering cells are 6. Consider path loss exponent = 4. (3 marks) (c) A duplex cellular system has allocated a total of 40 MHz spectrum in the band of 890 MHz and above spectrum. The total number of channels are 800 and the forward channel frequency is 35 MHz higher than reverse channel frequency. Determine the bandwidth of each channel. Further, determine the distance between the center of two nearest co-channels for N=7, where each cell radius is 5 Km. (4 marks)

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