The binary data stream 01101000 is applied to a ?/4-shifted DQPSK modulator that is initially in the
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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.
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$2 (a) (b)
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