General Introduction
Analysis Of DQPSK
Advanced Development
Modulation Schemes In Fiber Optical System
Simulation
Futher Learning
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.