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Which among the following is necessary to ensure operation free of interference?

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Which among the following is necessary to ensure operation free of interference?

(a) Maximum data rate

(b) Maximum coverage area

(c) Minimum distance of operation

(d) Minimum transmission power

The question was asked during a job interview.

I need to ask this question from Next Generation Wireless Network topic in chapter Next Generation Wireless Network of Cognitive Radio

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Correct option is (c) Minimum distance of operation

The best explanation: The mobile transmitter, mobile receiver configuration presents an environment with different power levels and unknown geometries between the receivers and transmitters. It is difficult to provide operation free of interference without fixing the minimum separation distance. In other words, all interference computations are performed assuming minimum separation distance.

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