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 usersThe question was asked in a national level competition.My question is from Next Generation Wireless Network in section Next Generation Wireless Network of Cognitive Radio

Which among the following is the function of out-of-band sensing?(a) D

1.	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 usersThe question was asked in a national level competition.My question is from Next Generation Wireless Network in section Next Generation Wireless Network of Cognitive Radio
Answer» Right choice is (B) Detect spectrum holes The best I can explain: 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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