This letter investigates a 30-Gb/s 3 × 3 optical mode group-division-multiplexing (MGDM) system over graded index multimode fiber (GI-MMF). With mode-selective spatial filtering (MSSF), the optimized joint detection has been realized, which de creases the complexity of the signal processing to recover received signals.
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Chen et al. (2011) studied this question.
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