QPSK Fiber Optic Communication Systems with Laser Phase Noise Compensation through DSP

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Design and Simulation of Coherent QPSK Fiber Optic Communication Systems
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with Laser Phase Noise Compensation through DSP

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Simulation Setup

 

 

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1. Laser Phase Noise Compensations through DSP

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Block Diagram of an IF and Phase Compensator used for Simulation

IF = intermediate frequency, Demux = demultiplexer, Phase Comp = block phase estimator and compensator, and Mux= multiplexer

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2. Laser Phase Noise Compensations through DSP

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Demultiplexing of the Data into K – Blocks with Each Block Consisting of N Samples used for Simulation

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.3. Laser Phase Noise Compensations through DSP

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Block Diagram of a Block Phase Estimator and Compensator for k-th Block used for Simulation

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Selected Simulated Results Using this Module

 

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4. Constellation Diagram Before Laser Phase Compensation

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Constellation Diagram Before Laser Phase Noise Compensation

 

.5. Constellation Diagram After Laser Phase Compensation

 

Constellation Diagram After Laser Phase Noise Compensation