Introducing Combined Effects of Filtering and ASE Noise in Optical Links Supposing Different Equalization Algorithms
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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866916926810226688 |
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| author | Miotto, Enrico Rosso, Andrea Virgillito, Emanuele Straullu, Stefano Castoldi, Andrea Bovio, Andrea Rodriguez, Francisco Martinez Curri, Vittorio |
| author_facet | Miotto, Enrico Rosso, Andrea Virgillito, Emanuele Straullu, Stefano Castoldi, Andrea Bovio, Andrea Rodriguez, Francisco Martinez Curri, Vittorio |
| contents | This paper presents a comprehensive analytical framework for evaluating filtering penalties in ASE-noise-limited coherent optical links. The model accounts for the cumulative effects of cascaded optical filters, amplifier-induced ASE noise, and transceiver noise, alongside digital equalization at the receiver. By developing a generalized channel representation, we derive closed-form expressions for signal-to-noise ratio degradation under various equalization strategies, including Zero-Forcing Equalizer, Minimum Mean Square Error Equalizer, and Fractionally Spaced Equalizer. These models capture the impact of colored noise resulting from linear filtering and provide both time and frequency-domain insights. The proposed framework is validated through experimental comparisons using accurately modeled optical filters, demonstrating close agreement between theory and practice and offering a robust foundation for system-level performance evaluation in metro-access networks. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_17408 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Introducing Combined Effects of Filtering and ASE Noise in Optical Links Supposing Different Equalization Algorithms Miotto, Enrico Rosso, Andrea Virgillito, Emanuele Straullu, Stefano Castoldi, Andrea Bovio, Andrea Rodriguez, Francisco Martinez Curri, Vittorio Signal Processing This paper presents a comprehensive analytical framework for evaluating filtering penalties in ASE-noise-limited coherent optical links. The model accounts for the cumulative effects of cascaded optical filters, amplifier-induced ASE noise, and transceiver noise, alongside digital equalization at the receiver. By developing a generalized channel representation, we derive closed-form expressions for signal-to-noise ratio degradation under various equalization strategies, including Zero-Forcing Equalizer, Minimum Mean Square Error Equalizer, and Fractionally Spaced Equalizer. These models capture the impact of colored noise resulting from linear filtering and provide both time and frequency-domain insights. The proposed framework is validated through experimental comparisons using accurately modeled optical filters, demonstrating close agreement between theory and practice and offering a robust foundation for system-level performance evaluation in metro-access networks. |
| title | Introducing Combined Effects of Filtering and ASE Noise in Optical Links Supposing Different Equalization Algorithms |
| topic | Signal Processing |
| url | https://arxiv.org/abs/2504.17408 |