Which among the following are problems of transmitter detection?(a) Secondary user uncertainty and xG base station uncertainty(b) xG base station uncertainty and primary base station uncertainty(c) Receiver uncertainty and shadowing uncertainty(d) Transmitter uncertainty and receiver uncertaintyThis question was posed to me in an interview for job.My enquiry is from Next Generation Wireless Network in division Next Generation Wireless Network of Cognitive Radio

Which among the following are problems of transmitter detection?(a) Se

1.	Which among the following are problems of transmitter detection?(a) Secondary user uncertainty and xG base station uncertainty(b) xG base station uncertainty and primary base station uncertainty(c) Receiver uncertainty and shadowing uncertainty(d) Transmitter uncertainty and receiver uncertaintyThis question was posed to me in an interview for job.My enquiry is from Next Generation Wireless Network in division Next Generation Wireless Network of Cognitive Radio
Answer» The CORRECT answer is (d) Transmitter uncertainty and receiver uncertainty Best explanation: When the xG USER communication range does not include the transmitter, interference is unavoidable as receiver information is unavailable. This is known as receiver uncertainty. In CERTAIN situations, the xG user has a good line of SIGHT with the receiver but is unaware, this is known as SHADOWING uncertainty.

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