Question: (a) Consider the sequence 011 101 010 111. Deferentially encode it and assume that the deferentially encoded sequence is used to biphase modulate a sinusoidal

(a) Consider the sequence 011 101 010 111. Deferentially encode it and assume that the deferentially encoded sequence is used to biphase modulate a sinusoidal carrier of arbitrary phase. Prove that the demodulator of Figure 9.17 properly gives back the original sequence.
(b) Now invert the sequence (i.e., 1s become 0s and vice versa). What does the demodulator of Figure 9.17 give now?

Figure 9.17

t = to + T Received to + T ()dt signal Decision Threshold to One-bit delay

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