Chromatic Dispersion Equalization FIR Digital Filter for Coherent Receiver

Chromatic dispersion equalization (CDE) in coherent optical communication systems is extremely critical for subsequent digital signal processing (such as frequency offset estimation and carrier phase recovery). Various methods mentioned in the published literature are not satisfactory when the signa...

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Autores principales:	Zicheng Wu, Sida Li, Zhiping Huang, Fangqi Shen, Yongjie Zhao
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	coherent optical communication chromatic dispersion AMPSO SVDLS Applied optics. Photonics TA1501-1820
Acceso en línea:	https://doaj.org/article/42031ecb29fc4a3394dd99bc9ebda03d
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spelling	oai:doaj.org-article:42031ecb29fc4a3394dd99bc9ebda03d2021-11-25T18:43:10ZChromatic Dispersion Equalization FIR Digital Filter for Coherent Receiver10.3390/photonics81104782304-6732https://doaj.org/article/42031ecb29fc4a3394dd99bc9ebda03d2021-10-01T00:00:00Zhttps://www.mdpi.com/2304-6732/8/11/478https://doaj.org/toc/2304-6732Chromatic dispersion equalization (CDE) in coherent optical communication systems is extremely critical for subsequent digital signal processing (such as frequency offset estimation and carrier phase recovery). Various methods mentioned in the published literature are not satisfactory when the signal bandwidth is limited. This paper proposes a way of using singular value decomposition least square (SVDLS) to obtain the optimal tap weight of the CDE filter and a method to introduce the adaptive mutation particle swarm optimizer (AMPSO) algorithm into the CDE. We show that the two proposed approaches are based on the best approximation of the frequency domain response of the designed and ideal CDE filter. Compared with the traditional CDE method, which needs to be implemented in the full frequency band, the two methods can be implemented in the narrow frequency band. The simulation shows that the effective bandwidth of the baseband signal is limited by squared-root-raised-cosine (SRRC) pulse shaping with a roll-off factor of 0.25 in different modulation formats (DP-QPSK, DP-16 QAM, DP-64 QAM) when the number of taps of the filter is 131, which is 37.5% less than the full frequency band. The designed filter is superior to the existing filter in terms of filtering effect and implementation complexity.Zicheng WuSida LiZhiping HuangFangqi ShenYongjie ZhaoMDPI AGarticlecoherent optical communicationchromatic dispersionAMPSOSVDLSApplied optics. PhotonicsTA1501-1820ENPhotonics, Vol 8, Iss 478, p 478 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	coherent optical communication chromatic dispersion AMPSO SVDLS Applied optics. Photonics TA1501-1820
spellingShingle	coherent optical communication chromatic dispersion AMPSO SVDLS Applied optics. Photonics TA1501-1820 Zicheng Wu Sida Li Zhiping Huang Fangqi Shen Yongjie Zhao Chromatic Dispersion Equalization FIR Digital Filter for Coherent Receiver
description	Chromatic dispersion equalization (CDE) in coherent optical communication systems is extremely critical for subsequent digital signal processing (such as frequency offset estimation and carrier phase recovery). Various methods mentioned in the published literature are not satisfactory when the signal bandwidth is limited. This paper proposes a way of using singular value decomposition least square (SVDLS) to obtain the optimal tap weight of the CDE filter and a method to introduce the adaptive mutation particle swarm optimizer (AMPSO) algorithm into the CDE. We show that the two proposed approaches are based on the best approximation of the frequency domain response of the designed and ideal CDE filter. Compared with the traditional CDE method, which needs to be implemented in the full frequency band, the two methods can be implemented in the narrow frequency band. The simulation shows that the effective bandwidth of the baseband signal is limited by squared-root-raised-cosine (SRRC) pulse shaping with a roll-off factor of 0.25 in different modulation formats (DP-QPSK, DP-16 QAM, DP-64 QAM) when the number of taps of the filter is 131, which is 37.5% less than the full frequency band. The designed filter is superior to the existing filter in terms of filtering effect and implementation complexity.
format	article
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
title	Chromatic Dispersion Equalization FIR Digital Filter for Coherent Receiver
title_short	Chromatic Dispersion Equalization FIR Digital Filter for Coherent Receiver
title_full	Chromatic Dispersion Equalization FIR Digital Filter for Coherent Receiver
title_fullStr	Chromatic Dispersion Equalization FIR Digital Filter for Coherent Receiver
title_full_unstemmed	Chromatic Dispersion Equalization FIR Digital Filter for Coherent Receiver
title_sort	chromatic dispersion equalization fir digital filter for coherent receiver
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/42031ecb29fc4a3394dd99bc9ebda03d
work_keys_str_mv	AT zichengwu chromaticdispersionequalizationfirdigitalfilterforcoherentreceiver AT sidali chromaticdispersionequalizationfirdigitalfilterforcoherentreceiver AT zhipinghuang chromaticdispersionequalizationfirdigitalfilterforcoherentreceiver AT fangqishen chromaticdispersionequalizationfirdigitalfilterforcoherentreceiver AT yongjiezhao chromaticdispersionequalizationfirdigitalfilterforcoherentreceiver
_version_	1718410766793572352

Chromatic Dispersion Equalization FIR Digital Filter for Coherent Receiver

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