| Presentation | 2023-01-13 Precise Signal Demodulation in Dynamic Environments Using Partially Frozen MIMO Adaptive Equalizers Akira Kawai, Masanori Nakamura, Minami Takahashi, Takayuki Kobayashi, Yutaka Miyamoto, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | For over-1 Tb/s/λ-class transceivers, it is important to improve the ability to accurately compensate for IQ impairments occurring within transceivers. To address this, an 8×2 MIMO adaptive equalizer, which has a larger number of internal degrees of freedom (DOFs) for the signal impairment compensation than that of a conventional 2×2 MIMO adaptive equalizer, has been proposed. However, there is a trade-off between the number of DOFs and a tracking speed for dynamic polarization fluctuations occurring in the fiber transmission line, which hinders the practical application of the 8×2 MIMO adaptive equalizer. In this study, we propose a partially frozen MIMO adaptive equalizer in which unnecessary update of DOFs are frozen to improve tracking speed, and demonstrated it with 128 GBaud signals under high-speed polarization fluctuations of 11 Mrad/s, showing better performances than those of the conventional configurations. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Digital signal processing / IQ impairment / MIMO / Adaptive equalizer |
| Paper # | OCS2022-69 |
| Date of Issue | 2023-01-05 (OCS) |
| Conference Information | |
| Committee | OCS / CS |
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| Conference Date | 2023/1/12(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | CANAL CITY HAKATA |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Takeshi Hoshida(Fujitsu) / Daisuke Umehara(Kyoto Inst. of Tech.) |
| Vice Chair | / Seiji Kozaki(Mitsubishi Electric) |
| Secretary | (NTT) / Seiji Kozaki(Sumitomo Electric Industries) |
| Assistant | / Hikaru Kawasaki(NICT) / Yuta Ida(Yamaguchi Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Optical Communication Systems / Technical Committee on Communication Systems |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Precise Signal Demodulation in Dynamic Environments Using Partially Frozen MIMO Adaptive Equalizers |
| Sub Title (in English) | |
| Keyword(1) | Digital signal processing |
| Keyword(2) | IQ impairment |
| Keyword(3) | MIMO |
| Keyword(4) | Adaptive equalizer |
| 1st Author's Name | Akira Kawai |
| 1st Author's Affiliation | NTT Network Innovation Laboratories(NTT) |
| 2nd Author's Name | Masanori Nakamura |
| 2nd Author's Affiliation | NTT Network Innovation Laboratories(NTT) |
| 3rd Author's Name | Minami Takahashi |
| 3rd Author's Affiliation | NTT Network Innovation Laboratories(NTT) |
| 4th Author's Name | Takayuki Kobayashi |
| 4th Author's Affiliation | NTT Network Innovation Laboratories(NTT) |
| 5th Author's Name | Yutaka Miyamoto |
| 5th Author's Affiliation | NTT Network Innovation Laboratories(NTT) |
| Date | 2023-01-13 |
| Paper # | OCS2022-69 |
| Volume (vol) | vol.122 |
| Number (no) | OCS-332 |
| Page | pp.pp.51-55(OCS), |
| #Pages | 5 |
| Date of Issue | 2023-01-05 (OCS) |