Fengchu Cao, Mingyi Gao, Pengfei Wang, Xiaodi You, Gangxiang Shen. Optimized blind equalization for probabilistically shaped high-order QAM signals[J]. Chinese Optics Letters, 2022, 20(8): 080601
- Chinese Optics Letters
- Vol. 20, Issue 8, 080601 (2022)
Fig. 1. (a) Structure diagram of CMA and (b) amplitude diagram of 16-QAM signals.
Fig. 2. Extracted partial amplitudes of PS 256-QAM signal in (a) Cartesian coordinate and (b) polar coordinate systems.
Fig. 3. Decision diagram of local density and relative distance.
Fig. 4. Experimental setup of a PS 256-QAM coherent optical transmission system.
Fig. 5. Extracted partial amplitudes of a PS 256-QAM signal with marked standard radii and decision region of amplitude.
Fig. 6. Measured BER versus OSNR of 7.4 bit/symbol 256-QAM signal.
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