Question

Which among the following is the function of out-of-band sensing?

a.

Detect primary base-station

b.

Detect spectrum holes

c.

Detect primary user

d.

Detect xG users

Posted under Cognitive Radio

Answer: (b).Detect spectrum holes Explanation:A cognitive radio should be aware of its surrounding radio environment. Spectrum sensing allows a radio to find the unused spectrum in the radio environment. In out-of-band sensing, cognitive radio users focus on the identification of spectrum holes over a wide frequency range to transmit their information.

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Q. Which among the following is the function of out-of-band sensing?

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