Here is the scheme I used for DQPSK. You can see 90 deg. phase produced by local generator (at the transmitter) and couplers are used at the receiver. I don’t have scheme in v11, sorry.
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Here is the scheme I used for DQPSK. You can see 90 deg. phase produced by local generator (at the transmitter) and couplers are used at the receiver. I don’t have scheme in v11, sorry.