Low-Cost Phase Precoding for Short-Reach Fiber Links with Direct Detection
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arXiv
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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866917969082187776 |
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| author | Höfler, Ulrike Plabst, Daniel Hanik, Norbert |
| author_facet | Höfler, Ulrike Plabst, Daniel Hanik, Norbert |
| contents | Low-cost analog phase precoding is used to compensate chromatic dispersion (CD) in fibers with intensity modulation and direct detection (IM/DD). In contrast to conventional precoding with an in-phase and quadrature (IQ) Mach-Zehnder modulator (MZM), only a single additional phase modulator (PM) is required at the transmitter. Depending on the CD, the PM generates a periodic phase modulation that is modelled by a Fourier series and optimized via a mean squared error (MSE) cost criterion. Numerical results compare achievable information rates (AIRs) for 4- and 6-PAM. With the additional PM, energy gains of up to 3 dB are achieved for moderate fiber lengths. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_21282 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Low-Cost Phase Precoding for Short-Reach Fiber Links with Direct Detection Höfler, Ulrike Plabst, Daniel Hanik, Norbert Signal Processing Low-cost analog phase precoding is used to compensate chromatic dispersion (CD) in fibers with intensity modulation and direct detection (IM/DD). In contrast to conventional precoding with an in-phase and quadrature (IQ) Mach-Zehnder modulator (MZM), only a single additional phase modulator (PM) is required at the transmitter. Depending on the CD, the PM generates a periodic phase modulation that is modelled by a Fourier series and optimized via a mean squared error (MSE) cost criterion. Numerical results compare achievable information rates (AIRs) for 4- and 6-PAM. With the additional PM, energy gains of up to 3 dB are achieved for moderate fiber lengths. |
| title | Low-Cost Phase Precoding for Short-Reach Fiber Links with Direct Detection |
| topic | Signal Processing |
| url | https://arxiv.org/abs/2503.21282 |