Which among the following is an advantage of spectrum sensing with radio environment map?(a) High sensitivity(b) Low transmission power(c) Reduction in observation time(d) High dynamic rangeThe question was asked by my school principal while I was bunking the class.The above asked question is from Next Generation Wireless Network in division Next Generation Wireless Network of Cognitive Radio

Which among the following is an advantage of spectrum sensing with rad

1.	Which among the following is an advantage of spectrum sensing with radio environment map?(a) High sensitivity(b) Low transmission power(c) Reduction in observation time(d) High dynamic rangeThe question was asked by my school principal while I was bunking the class.The above asked question is from Next Generation Wireless Network in division Next Generation Wireless Network of Cognitive Radio
Answer» Correct choice is (c) Reduction in observation time To ELABORATE: The radio environment map holds both present and past radio environment information. Spectrum SENSING with prior knowledge is more effective than continuous SCANNING of the ENTIRE radio spectrum. Consequently, the observation time, cost, and energy consumption of radio can be REDUCED.

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