Low-Complexity Chromatic Dispersion Equalization FIR Digital Filter for Coherent Receiver
This paper proposes a novel and efficient low-complexity chromatic dispersion equalizer (CDE) based on finite impulse response (FIR) filter architecture for polarization-multiplexed coherent optical communication systems. The FIR filter coefficients are optimized by weights to reduce the energy leak...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-04-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/9/4/263 |
| _version_ | 1797409591976263680 |
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| author | Zicheng Wu Sida Li Zhiping Huang Fangqi Shen Yongjie Zhao |
| author_facet | Zicheng Wu Sida Li Zhiping Huang Fangqi Shen Yongjie Zhao |
| author_sort | Zicheng Wu |
| collection | DOAJ |
| description | This paper proposes a novel and efficient low-complexity chromatic dispersion equalizer (CDE) based on finite impulse response (FIR) filter architecture for polarization-multiplexed coherent optical communication systems. The FIR filter coefficients are optimized by weights to reduce the energy leakage caused by the truncation effect, and then quantization is used uniformly to reduce the number of real number additions and real number multiplications by utilizing the diversity of the quantized coefficients. Using Optisystem 15 to build a coherent optical communication system for simulation and experimental demonstration, the results show that after the filter coefficients are optimized by weights. Compared with the time-domain chromatic dispersion equalizer (TD-CDE), the proposed design has a lower bit error rate (BER) and better equalization effect. When the transmission distance is 4000 km and the system quantization stages M = 16, the multiplication operation and addition operations reduce computing resources by 99% and 43%, and the BER only increases by 5%. Compared with frequency-domain chromatic dispersion equalizer (FD-CDE), widely used in long-distance communication, the multiplication operation reduces computing resources by 30%. The proposed method provides a new idea for high-performance CDE in long-distance coherent optical communication systems. |
| first_indexed | 2024-03-09T04:16:49Z |
| format | Article |
| id | doaj.art-32595de164814d9797bb6672d139682b |
| institution | Directory Open Access Journal |
| issn | 2304-6732 |
| language | English |
| last_indexed | 2024-03-09T04:16:49Z |
| publishDate | 2022-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj.art-32595de164814d9797bb6672d139682b2023-12-03T13:51:38ZengMDPI AGPhotonics2304-67322022-04-019426310.3390/photonics9040263Low-Complexity Chromatic Dispersion Equalization FIR Digital Filter for Coherent ReceiverZicheng Wu0Sida Li1Zhiping Huang2Fangqi Shen3Yongjie Zhao4College of Intelligence Science and Technology, National University of Defense Technology, Changsha 410073, ChinaCollege of Intelligence Science and Technology, National University of Defense Technology, Changsha 410073, ChinaCollege of Intelligence Science and Technology, National University of Defense Technology, Changsha 410073, ChinaCollege of Intelligence Science and Technology, National University of Defense Technology, Changsha 410073, ChinaCollege of Intelligence Science and Technology, National University of Defense Technology, Changsha 410073, ChinaThis paper proposes a novel and efficient low-complexity chromatic dispersion equalizer (CDE) based on finite impulse response (FIR) filter architecture for polarization-multiplexed coherent optical communication systems. The FIR filter coefficients are optimized by weights to reduce the energy leakage caused by the truncation effect, and then quantization is used uniformly to reduce the number of real number additions and real number multiplications by utilizing the diversity of the quantized coefficients. Using Optisystem 15 to build a coherent optical communication system for simulation and experimental demonstration, the results show that after the filter coefficients are optimized by weights. Compared with the time-domain chromatic dispersion equalizer (TD-CDE), the proposed design has a lower bit error rate (BER) and better equalization effect. When the transmission distance is 4000 km and the system quantization stages M = 16, the multiplication operation and addition operations reduce computing resources by 99% and 43%, and the BER only increases by 5%. Compared with frequency-domain chromatic dispersion equalizer (FD-CDE), widely used in long-distance communication, the multiplication operation reduces computing resources by 30%. The proposed method provides a new idea for high-performance CDE in long-distance coherent optical communication systems.https://www.mdpi.com/2304-6732/9/4/263coherent optical communicationchromatic dispersion equalizationweight optimizationuniform quantization |
| spellingShingle | Zicheng Wu Sida Li Zhiping Huang Fangqi Shen Yongjie Zhao Low-Complexity Chromatic Dispersion Equalization FIR Digital Filter for Coherent Receiver Photonics coherent optical communication chromatic dispersion equalization weight optimization uniform quantization |
| title | Low-Complexity Chromatic Dispersion Equalization FIR Digital Filter for Coherent Receiver |
| title_full | Low-Complexity Chromatic Dispersion Equalization FIR Digital Filter for Coherent Receiver |
| title_fullStr | Low-Complexity Chromatic Dispersion Equalization FIR Digital Filter for Coherent Receiver |
| title_full_unstemmed | Low-Complexity Chromatic Dispersion Equalization FIR Digital Filter for Coherent Receiver |
| title_short | Low-Complexity Chromatic Dispersion Equalization FIR Digital Filter for Coherent Receiver |
| title_sort | low complexity chromatic dispersion equalization fir digital filter for coherent receiver |
| topic | coherent optical communication chromatic dispersion equalization weight optimization uniform quantization |
| url | https://www.mdpi.com/2304-6732/9/4/263 |
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