Question 4 (a) You are required to design a FM communication system for the following specifications: Please do note

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Question 4
(a) You are
required to design a FM communication system for the following
specifications:
Please do note, that marks will be
given for appropriate justification for the choice
of values for the following. State any assumptions made.
(i) Determine, the appropriate
deviation ratio, β, for this design using only the information
given in the table in Appendix 4 in page 14.
(4 marks)
(ii) Calculate the maximum peak deviation
frequency, Df, required for the given specifications.
(3 marks)
(iii) Determine the value of kFM required for
this system.
(3 marks)
(iv) Use the data provided in the appendix to
determine the amplitude of each frequency component of the
resultant FM signal.
(6 marks)
(b) An AM
system has been designed for a modulation index of 0.6 using a
carrier frequency of 1 MHz with an amplitude of 1 V for a
baseband signal with a frequency component of
4.5 kHz.
(i) Determine, with justification,
the amplitude of the baseband signal.
(2 marks)
(ii) Show on a diagram the frequency
components for this system, indicating clearly the frequency and
amplitude of each component as well as the bandwidth of the AM
signal. Marks will be given for the justification of your
answer.
(4 marks)
(iii) Determine, the appropriate deviation ratio,
β, of a FM system that would have the same bandwidth as this AM
system.
(3 marks)