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Which among the following is an appropriate unit for spectrum usage in cognitive radio?(a) Bits per unit area(b) Noise per unit area(c) Noise temperature per unit area(d) Symbols per unit areaThis question was posed to me in quiz.I want to ask this question from Next Generation Wireless Network topic in section Next Generation Wireless Network of Cognitive Radio

Answer»

Right answer is (a) Bits PER unit area

The explanation is: Spectrum usage in the COGNITIVE radio includes the area of PROPAGATION along with the amount of spectrum used. HENCE the number of bits per unit area is an appropriate unit for spectrum usage in cognitive radio. This necessitates the inclusion of propagation in the Shannon limit.



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