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DSP algorithms for recovering single-carrier Alamouti coded signals for PON applications
Optics Express
|November 10, 2016
Summary
This study demonstrates a simplified heterodyne coherent receiver using Alamouti space-time block code (STBC) for single-carrier systems. This polarization-insensitive method simplifies optical systems without compromising performance.
Area of Science:
- Optical Communications
- Signal Processing
- Wireless Technology
Background:
- Traditional coherent detection requires complex optical polarization tracking.
- Simplified heterodyne coherent receivers offer polarization-insensitive detection.
- Previous demonstrations used orthogonal frequency-division multiplexing (OFDM) signals.
Purpose of the Study:
- To adapt Alamouti space-time block code (STBC) for single-carrier (SC) systems with simplified heterodyne coherent receivers.
- To address implementation challenges and develop digital signal processing (DSP) algorithms for SC Alamouti STBC.
- To verify the polarization-insensitive operation and performance of the proposed scheme.
Main Methods:
- Implementing Alamouti STBC with a simplified heterodyne coherent receiver.
- Developing specialized digital signal processing (DSP) algorithms for data recovery in SC systems.
- Simulating a 12-Gbits/s quadrature phase-shift keying (QPSK) transmission system.
Main Results:
- Successful application of Alamouti STBC to single-carrier systems using simplified heterodyne detection.
- Demonstration of polarization-insensitive operation without active polarization tracking.
- Verification of system performance through simulation for a 12-Gbits/s QPSK system.
Conclusions:
- The proposed scheme effectively integrates Alamouti STBC with simplified heterodyne coherent receivers for single-carrier optical communication.
- Specialized DSP algorithms enable robust data recovery, overcoming implementation challenges.
- The polarization-insensitive approach simplifies receiver design and maintains high performance.
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