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Reduced-complexity algorithm for space-demultiplexing based on higher-order Poincaré spheres
Optics Express
|May 27, 2018
Summary
We introduce a new algorithm for space-demultiplexing optical signals using higher-order Poincaré spheres (HoPs). This method significantly reduces complexity and speeds up convergence, improving optical communication system performance.
Area of Science:
- Optical Communications
- Signal Processing
Background:
- Space-division multiplexing (SDM) is crucial for increasing fiber capacity.
- Existing space-demultiplexing algorithms often suffer from high complexity and sensitivity to system impairments.
Purpose of the Study:
- To develop a reduced-complexity, modulation-agnostic space-demultiplexing algorithm.
- To enhance the robustness and convergence speed of SDM systems.
Main Methods:
- A novel space-demultiplexing algorithm based on higher-order Poincaré spheres (HoPs) is proposed.
- The algorithm realigns the best fit plane in HoPs to demultiplex signal tributaries.
- An iterative approach constructs the inverse channel matrix by demultiplexing tributary pairs.
Main Results:
- The proposed algorithm achieves a 99% reduction in computational complexity compared to prior HoPs-based methods.
- A 97% improvement in convergence speed was observed.
- The algorithm is modulation format agnostic and robust to phase fluctuations and frequency offsets.
Conclusions:
- The new HoPs-based algorithm offers a significantly more efficient and faster solution for space-demultiplexing in SDM systems.
- This advancement has the potential to improve the scalability and performance of future optical networks.
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