Question: Question 3: (20 marks) a) A sine wave is to be used for two different signaling schemes: (1) PSK; (i) QPSK. The duration of a

Question 3: (20 marks) a) A sine wave is to be

Question 3: (20 marks) a) A sine wave is to be used for two different signaling schemes: (1) PSK; (i) QPSK. The duration of a signal element is 10 second. If the received signal is of the following form: s(t) = 0.005 sin(210 x 106 t +0) volts and if the measured noise power at the receiver is 2.5x10-8 watts, determine the Ey/N. (in dB) for each case. (12 marks) b) Consider an audio signal with spectral components in the range 300 to 3000 Hz. Assume that a sampling rate of 7000 samples per second will be used to generate a PCM signal. i. For SNR = 30 dB, what is the number of uniform quantization levels needed? (5 marks) ii. What data rate is required

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