1.

The rule of thumb for antenna diversity states that for an antenna separation of 10 wavelengths or more, there is a considerable probability for the diversity signal to be substantially decorrelated from the primary signal.(a) True(b) FalseThis question was addressed to me in a job interview.Origin of the question is Antenna Tradeoffs topic in chapter Technology Tradeoffs in Software Defined Radio of Cognitive Radio

Answer»

Right choice is (a) True

For explanation I would say: DOPPLER spread introduces decorrelation as a function of antenna separation.The rule of THUMB for antenna diversity states that for an antenna separation of 10 wavelengths or more, there is a considerable probability for the diversity signal to be SUBSTANTIALLY decorrelated from the PRIMARY signal.



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