The binary data stream 01101000 is applied to a ?/4-shifted DQPSK modulator that is initially in the

Question:

The binary data stream 01101000 is applied to a ?/4-shifted DQPSK modulator that is initially in the state (?1 = ?E, ?2 = 0) in Figure. Using the relationship between input debits and carrier-phase shifts summarized in Table 6.2m determine the phase states occupied by the modulator in response to the specified data stream.