Transmitter And Receiver

Transmitter

The DQPSK Transmitter

The DQPSK transmitter can be considered as the two channels BPSK transmitters, which shows as above.

Receiver

The DQPSK Receiver

There are two kinds of receivers: coherent detector and differential decoder.

This is a block diagram of the DQPSK receiver, which used the differential coherent detector. It is clearly to consider it as two quadrature channels BPSK receivers.