Home › Forums › SYSTEM › QPSK Demodulation with Single Photodetector › Reply To: QPSK Demodulation with Single Photodetector
September 9, 2020 at 1:37 pm
#68075

Hello Essam,
You need to use four PDs in the receiver to extract the information of the modulated received QPSK signal as shown in the attached file. There is amplitude and phase information that you need to extract, which can’t be obtained using a single detector because it is a square law device.
Regards,
Ahmad
Categories
- All
-
Knowledge
Contains a detailed Q&A knowledge base. -
General
All non-technical questions. -
System
Optical system design and analysis. -
Instrument
Communicate and control different kinds of instruments. -
SPICE
Opto-electronic circuit design. -
FDTD
Finite-Difference Time-Domain simulation. -
BPM
Beam Propagation Method analysis and design. -
Grating
Fiber optic grating simulation. -
Fiber
Optical fiber design and characterization. -
Exchange
Users can exchange design files.
(Matlab, C++, etc.)