I. Which of the following is correct description for M-ary modulation method compared to a binary one? (a) It has higher power efticiency (b) The corresponding circuit is simpler (c, It has better performance in terms of BER vs Ey/No. It is more bandwidth efficient. 12. Which one gives the maximum error probability for a fixed SNR? ASK (b) BPSK DPSK (d) DUncertam 13. Which one gives the minimum error probability for a fixed SNR? ASK (b) BPSK DPSK (d) Uncertam 14. Binary data is transmitted using the BPSK signaling scheme with Si(f) = Acos(o), S.(0) = – Acos(6×1). € 1 & T. where bit duration 7s is equal to 0.lms. The carrier frequency / = 56. The carrier amplitude at the receiver input is ImV and the power spectral density of the AWGN at the input is 10-” W/Hz. The error probability of an optimum filter will be (0) e(V5) (b) e(VIO) 0.50(V5) 0.5 O(VIO) 15. In an FSK system, the transmitted binary data rate = 2.5 Mbits/sec, the power spectral density of AWGN is .No/2 = 10-12W/Hz, and the amplitude of the received signal in the absence of noise is 10mV. The average probability of symbol error will be (Note: Refer to the textbook for FSK. which is not covered in our lectures.) e(VIo) (b) Q(V5) 0.50(5) (d) 0.5 O VIO