d) For a constellation diagram with 2 different amplitudes; r1, r2, with r1< r2; phase
difference between the transmitted signals with amplitude r1 shall be 45
degrees; phase difference between the transmitted signals with amplitude r2
shall also be 45 degrees.
(i) Draw the constellation diagram.
(ii) What type of digital modulation scheme is, and why?
(iii) How many bits do we need to describe it, and why?
(iv) Based on the above scheme, display all possible symbols on the
constellation diagram.
(v) What is the BER in the instance when 1 of the transmitted symbols of
the above modulation scheme is not received correctly?
(11 marks)
