a.In a baseband transmission of digital data it is observed that the waveform changes its value at the middle of every bit period irrespective of the binary value of the signal. Which of the following schemes may be used in the transmitter system? NRZ-L, Uni polar RZ, Bipolar RZ, RZ AMI, Bi-phase Manchester, delay modulation. Justify your answer with waveform for input data 10110001101.

b. Compare BPSK and QPSK in terms of error performance and data rate.

Digital Communication ELEC 20004