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Asymmetrical Filtering Impairments Mitigation for Digital- Subcarrier-Multiplexing Transmissions Enabled by Multiplication-free K-State Reserved Complex MLSE

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arxiv 2507.23351 v1 pith:NP3FQMDB submitted 2025-07-31 physics.optics

Asymmetrical Filtering Impairments Mitigation for Digital- Subcarrier-Multiplexing Transmissions Enabled by Multiplication-free K-State Reserved Complex MLSE

classification physics.optics
keywords mlseasymmetricalcomplexfilteringimpairmentsk-statemultiplication-freereserved
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We propose a multiplication-free K-state reserved complex maximum-likelihood-sequence-estimation (MLSE) to mitigate asymmetrical filtering impairments in digital-subcarrier-multiplexing transmissions. A required optical-to-noise ratio of 1.63dB over the conventional real MLSE is obtained after transmitting 90 GBaud DSCM DP-16QAM signal over 14 WSSs without multiplications.

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