Q3: Find the bit error probability of 1200 baud coherent 32-PSK if the available signal power at demodulator is 10-10 watt and one sided AWGN spectral density of 10-14 watt/Hz is assumed.
Q1: Design a 8-ASK demodulator identifying the number of comparators needed and their threshold values.
Q2: A modulating signal f(t) is bandlimited to 4KHz is sampled at a rate of 10000 samples/ sec. The samples are quantized into 256 levels. Calculate transmission bandwidth if the following modulation types are used for signal transmission: 8- ASK, 8-PSK, 8-FSK with Af=50 kHz.
Q3: Find the bit error probability of 1200 baud coherent 32-PSK if the available signal power at demodulator is 10-10 watt and one sided AWGN spectral density of 10-14 watt/Hz is assumed.
Q4: Draw the constellation diagram of 2*8 QAM signal then show the output amplitudes and phases of the signal when the following data stream are modulated 11001011111100100011
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