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22 August 2017 MIMO processing based on higher-order Poincaré spheres
Gil M. Fernandes, Nelson J. Muga, Armando N. Pinto
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Proceedings Volume 10453, Third International Conference on Applications of Optics and Photonics; 104532I (2017) https://doi.org/10.1117/12.2276251
Event: Third International Conference on Applications of Optics and Photonics, 2017, Faro, Portugal
Abstract
A multi-input multi-output (MIMO) algorithm based on higher-order Poincaré spheres is demonstrated for space-division multiplexing (SDM) systems. The MIMO algorithm is modulation format agnostic, robust to frequency offset and does not require training sequences. In this approach, the space-multiplexed signal is decomposed in sets of two tributary signals, with each set represented in a higher-order Poincaré sphere. For any arbitrary complex modulation format, the samples of two tributaries can be represented in a given higher-order Poincaré sphere with a symmetry plane. The crosstalk along propagation changes the spatial orientation of this plane and, therefore, it can be compensated by computing and realigning the best fit plane. We show how the transmitted signal can be successfully recovered using this procedure for all possible combinations of tributaries. Moreover, we analyze the convergence speed for the MIMO technique considering several optical-to-noise ratios.
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Gil M. Fernandes, Nelson J. Muga, and Armando N. Pinto "MIMO processing based on higher-order Poincaré spheres", Proc. SPIE 10453, Third International Conference on Applications of Optics and Photonics, 104532I (22 August 2017); https://doi.org/10.1117/12.2276251
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KEYWORDS
Optical spheres
Modulation
Poincaré sphere
Digital signal processing
Fiber optic communications
Space division multiplexing
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