(a) For a bit stream 110110100, sketch the output of BASK, BPSK, DPSK…

Question

(a) For a bit stream 110110100, sketch the output of BASK, BPSK, DPSK and BFSK transmitters.

Assume $f_s = f_b$ for first three cases and $f_L = f_b$ and $f_H = 2 f_b$ for last. [10]

(b) Explain with the help of example why error always occur in pairs in DEPSK ? [10]