Which among the following methods may be used to estimate interference in cognitive radio?(a) Model the radio(b) Model the user behaviour(c) Model the channel(d) Model the propagation of signalI have been asked this question in an interview.I would like to ask this question from Architecture in section Cognitive Radio Architecture of Cognitive Radio

Which among the following methods may be used to estimate interference

1.	Which among the following methods may be used to estimate interference in cognitive radio?(a) Model the radio(b) Model the user behaviour(c) Model the channel(d) Model the propagation of signalI have been asked this question in an interview.I would like to ask this question from Architecture in section Cognitive Radio Architecture of Cognitive Radio
Answer» The correct option is (d) MODEL the PROPAGATION of signal The explanation: The cognition function replicate the propagation of RADIO signal with good quality to determine the level of interference expected towards other users of the SPECTRUM. It may also be used to verify whether the interference level is within the specified LIMITS imposed by the protocols pertaining to the location.

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