32 Gbps QPSK Optical Communication Technology Based on a New Equalizer in Atmospheric Turbulence

In this paper, cascaded least mean square-least mean square (LMS-LMS) adaptive equalization scheme is proposed based on fiber coupling system, in order to improve the transmission performance of quadrature phase shift keying (QPSK) modulated optical signals in medium and weak turbulence channels. Fi...
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Autor*in:	Binyu Li [verfasserIn] Haifeng Yao [verfasserIn] Lei Zhang [verfasserIn] Shoufeng Tong [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2021

Schlagwörter:	Free space optical communication quadrature phase shift keying atmospheric turbulence simulator cascaded LMS-LMS adaptive equalizer

Übergeordnetes Werk:	In: IEEE Access - IEEE, 2014, 9(2021), Seite 130751-130757
Übergeordnetes Werk:	volume:9 ; year:2021 ; pages:130751-130757

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.1109/ACCESS.2021.3113336

Katalog-ID:	DOAJ004750543

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520			\|a In this paper, cascaded least mean square-least mean square (LMS-LMS) adaptive equalization scheme is proposed based on fiber coupling system, in order to improve the transmission performance of quadrature phase shift keying (QPSK) modulated optical signals in medium and weak turbulence channels. First, the transmission performance of QPSK optical signal in different atmospheric turbulence channels is simulated and analyzed according to the characteristics of optical fiber coupling system and the characteristics of atmospheric turbulence channel. Secondly, cascaded LMS-LMS equalization scheme is proposed, and its distortion signal is corrected based on the original simulation results to verify the effectiveness and robustness of LMS-LMS. Finally, atmospheric turbulence simulator is used to verify the improvement effect of cascaded LMS-LMS adaptive equalizer under different turbulence conditions. The experimental results show that when the coherence length is <inline-formula< <tex-math notation="LaTeX"<$r_{0} =1.6 $ </tex-math<</inline-formula< cm and the received optical power is −34 dBm, the system can transfer the information at a rate of 32 Gbps QPSK after using cascaded LMS-LMS adaptive equalizer, and the bit-error ratio (BER) is lower than the minimum limit of forward error correction (FEC, <inline-formula< <tex-math notation="LaTeX"<$3.8 \times 10 ^{-3}$ </tex-math<</inline-formula<). This paper can provide theoretical guidance for the performance optimization of free space QPSK optical signal transmission system.
650		4	\|a Free space optical communication
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allfields	10.1109/ACCESS.2021.3113336 doi (DE-627)DOAJ004750543 (DE-599)DOAJeda311a6160243b9bd0f59c2e934a711 DE-627 ger DE-627 rakwb eng TK1-9971 Binyu Li verfasserin aut 32 Gbps QPSK Optical Communication Technology Based on a New Equalizer in Atmospheric Turbulence 2021 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In this paper, cascaded least mean square-least mean square (LMS-LMS) adaptive equalization scheme is proposed based on fiber coupling system, in order to improve the transmission performance of quadrature phase shift keying (QPSK) modulated optical signals in medium and weak turbulence channels. First, the transmission performance of QPSK optical signal in different atmospheric turbulence channels is simulated and analyzed according to the characteristics of optical fiber coupling system and the characteristics of atmospheric turbulence channel. Secondly, cascaded LMS-LMS equalization scheme is proposed, and its distortion signal is corrected based on the original simulation results to verify the effectiveness and robustness of LMS-LMS. Finally, atmospheric turbulence simulator is used to verify the improvement effect of cascaded LMS-LMS adaptive equalizer under different turbulence conditions. The experimental results show that when the coherence length is <inline-formula< <tex-math notation="LaTeX"<$r_{0} =1.6 $ </tex-math<</inline-formula< cm and the received optical power is −34 dBm, the system can transfer the information at a rate of 32 Gbps QPSK after using cascaded LMS-LMS adaptive equalizer, and the bit-error ratio (BER) is lower than the minimum limit of forward error correction (FEC, <inline-formula< <tex-math notation="LaTeX"<$3.8 \times 10 ^{-3}$ </tex-math<</inline-formula<). This paper can provide theoretical guidance for the performance optimization of free space QPSK optical signal transmission system. Free space optical communication quadrature phase shift keying atmospheric turbulence simulator cascaded LMS-LMS adaptive equalizer Electrical engineering. Electronics. Nuclear engineering Haifeng Yao verfasserin aut Lei Zhang verfasserin aut Shoufeng Tong verfasserin aut In IEEE Access IEEE, 2014 9(2021), Seite 130751-130757 (DE-627)728440385 (DE-600)2687964-5 21693536 nnns volume:9 year:2021 pages:130751-130757 https://doi.org/10.1109/ACCESS.2021.3113336 kostenfrei https://doaj.org/article/eda311a6160243b9bd0f59c2e934a711 kostenfrei https://ieeexplore.ieee.org/document/9540655/ kostenfrei https://doaj.org/toc/2169-3536 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 9 2021 130751-130757
spelling	10.1109/ACCESS.2021.3113336 doi (DE-627)DOAJ004750543 (DE-599)DOAJeda311a6160243b9bd0f59c2e934a711 DE-627 ger DE-627 rakwb eng TK1-9971 Binyu Li verfasserin aut 32 Gbps QPSK Optical Communication Technology Based on a New Equalizer in Atmospheric Turbulence 2021 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In this paper, cascaded least mean square-least mean square (LMS-LMS) adaptive equalization scheme is proposed based on fiber coupling system, in order to improve the transmission performance of quadrature phase shift keying (QPSK) modulated optical signals in medium and weak turbulence channels. First, the transmission performance of QPSK optical signal in different atmospheric turbulence channels is simulated and analyzed according to the characteristics of optical fiber coupling system and the characteristics of atmospheric turbulence channel. Secondly, cascaded LMS-LMS equalization scheme is proposed, and its distortion signal is corrected based on the original simulation results to verify the effectiveness and robustness of LMS-LMS. Finally, atmospheric turbulence simulator is used to verify the improvement effect of cascaded LMS-LMS adaptive equalizer under different turbulence conditions. The experimental results show that when the coherence length is <inline-formula< <tex-math notation="LaTeX"<$r_{0} =1.6 $ </tex-math<</inline-formula< cm and the received optical power is −34 dBm, the system can transfer the information at a rate of 32 Gbps QPSK after using cascaded LMS-LMS adaptive equalizer, and the bit-error ratio (BER) is lower than the minimum limit of forward error correction (FEC, <inline-formula< <tex-math notation="LaTeX"<$3.8 \times 10 ^{-3}$ </tex-math<</inline-formula<). This paper can provide theoretical guidance for the performance optimization of free space QPSK optical signal transmission system. Free space optical communication quadrature phase shift keying atmospheric turbulence simulator cascaded LMS-LMS adaptive equalizer Electrical engineering. Electronics. Nuclear engineering Haifeng Yao verfasserin aut Lei Zhang verfasserin aut Shoufeng Tong verfasserin aut In IEEE Access IEEE, 2014 9(2021), Seite 130751-130757 (DE-627)728440385 (DE-600)2687964-5 21693536 nnns volume:9 year:2021 pages:130751-130757 https://doi.org/10.1109/ACCESS.2021.3113336 kostenfrei https://doaj.org/article/eda311a6160243b9bd0f59c2e934a711 kostenfrei https://ieeexplore.ieee.org/document/9540655/ kostenfrei https://doaj.org/toc/2169-3536 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 9 2021 130751-130757
allfields_unstemmed	10.1109/ACCESS.2021.3113336 doi (DE-627)DOAJ004750543 (DE-599)DOAJeda311a6160243b9bd0f59c2e934a711 DE-627 ger DE-627 rakwb eng TK1-9971 Binyu Li verfasserin aut 32 Gbps QPSK Optical Communication Technology Based on a New Equalizer in Atmospheric Turbulence 2021 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In this paper, cascaded least mean square-least mean square (LMS-LMS) adaptive equalization scheme is proposed based on fiber coupling system, in order to improve the transmission performance of quadrature phase shift keying (QPSK) modulated optical signals in medium and weak turbulence channels. First, the transmission performance of QPSK optical signal in different atmospheric turbulence channels is simulated and analyzed according to the characteristics of optical fiber coupling system and the characteristics of atmospheric turbulence channel. Secondly, cascaded LMS-LMS equalization scheme is proposed, and its distortion signal is corrected based on the original simulation results to verify the effectiveness and robustness of LMS-LMS. Finally, atmospheric turbulence simulator is used to verify the improvement effect of cascaded LMS-LMS adaptive equalizer under different turbulence conditions. The experimental results show that when the coherence length is <inline-formula< <tex-math notation="LaTeX"<$r_{0} =1.6 $ </tex-math<</inline-formula< cm and the received optical power is −34 dBm, the system can transfer the information at a rate of 32 Gbps QPSK after using cascaded LMS-LMS adaptive equalizer, and the bit-error ratio (BER) is lower than the minimum limit of forward error correction (FEC, <inline-formula< <tex-math notation="LaTeX"<$3.8 \times 10 ^{-3}$ </tex-math<</inline-formula<). This paper can provide theoretical guidance for the performance optimization of free space QPSK optical signal transmission system. Free space optical communication quadrature phase shift keying atmospheric turbulence simulator cascaded LMS-LMS adaptive equalizer Electrical engineering. Electronics. Nuclear engineering Haifeng Yao verfasserin aut Lei Zhang verfasserin aut Shoufeng Tong verfasserin aut In IEEE Access IEEE, 2014 9(2021), Seite 130751-130757 (DE-627)728440385 (DE-600)2687964-5 21693536 nnns volume:9 year:2021 pages:130751-130757 https://doi.org/10.1109/ACCESS.2021.3113336 kostenfrei https://doaj.org/article/eda311a6160243b9bd0f59c2e934a711 kostenfrei https://ieeexplore.ieee.org/document/9540655/ kostenfrei https://doaj.org/toc/2169-3536 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 9 2021 130751-130757
allfieldsGer	10.1109/ACCESS.2021.3113336 doi (DE-627)DOAJ004750543 (DE-599)DOAJeda311a6160243b9bd0f59c2e934a711 DE-627 ger DE-627 rakwb eng TK1-9971 Binyu Li verfasserin aut 32 Gbps QPSK Optical Communication Technology Based on a New Equalizer in Atmospheric Turbulence 2021 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In this paper, cascaded least mean square-least mean square (LMS-LMS) adaptive equalization scheme is proposed based on fiber coupling system, in order to improve the transmission performance of quadrature phase shift keying (QPSK) modulated optical signals in medium and weak turbulence channels. First, the transmission performance of QPSK optical signal in different atmospheric turbulence channels is simulated and analyzed according to the characteristics of optical fiber coupling system and the characteristics of atmospheric turbulence channel. Secondly, cascaded LMS-LMS equalization scheme is proposed, and its distortion signal is corrected based on the original simulation results to verify the effectiveness and robustness of LMS-LMS. Finally, atmospheric turbulence simulator is used to verify the improvement effect of cascaded LMS-LMS adaptive equalizer under different turbulence conditions. The experimental results show that when the coherence length is <inline-formula< <tex-math notation="LaTeX"<$r_{0} =1.6 $ </tex-math<</inline-formula< cm and the received optical power is −34 dBm, the system can transfer the information at a rate of 32 Gbps QPSK after using cascaded LMS-LMS adaptive equalizer, and the bit-error ratio (BER) is lower than the minimum limit of forward error correction (FEC, <inline-formula< <tex-math notation="LaTeX"<$3.8 \times 10 ^{-3}$ </tex-math<</inline-formula<). This paper can provide theoretical guidance for the performance optimization of free space QPSK optical signal transmission system. Free space optical communication quadrature phase shift keying atmospheric turbulence simulator cascaded LMS-LMS adaptive equalizer Electrical engineering. Electronics. Nuclear engineering Haifeng Yao verfasserin aut Lei Zhang verfasserin aut Shoufeng Tong verfasserin aut In IEEE Access IEEE, 2014 9(2021), Seite 130751-130757 (DE-627)728440385 (DE-600)2687964-5 21693536 nnns volume:9 year:2021 pages:130751-130757 https://doi.org/10.1109/ACCESS.2021.3113336 kostenfrei https://doaj.org/article/eda311a6160243b9bd0f59c2e934a711 kostenfrei https://ieeexplore.ieee.org/document/9540655/ kostenfrei https://doaj.org/toc/2169-3536 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 9 2021 130751-130757
allfieldsSound	10.1109/ACCESS.2021.3113336 doi (DE-627)DOAJ004750543 (DE-599)DOAJeda311a6160243b9bd0f59c2e934a711 DE-627 ger DE-627 rakwb eng TK1-9971 Binyu Li verfasserin aut 32 Gbps QPSK Optical Communication Technology Based on a New Equalizer in Atmospheric Turbulence 2021 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In this paper, cascaded least mean square-least mean square (LMS-LMS) adaptive equalization scheme is proposed based on fiber coupling system, in order to improve the transmission performance of quadrature phase shift keying (QPSK) modulated optical signals in medium and weak turbulence channels. First, the transmission performance of QPSK optical signal in different atmospheric turbulence channels is simulated and analyzed according to the characteristics of optical fiber coupling system and the characteristics of atmospheric turbulence channel. Secondly, cascaded LMS-LMS equalization scheme is proposed, and its distortion signal is corrected based on the original simulation results to verify the effectiveness and robustness of LMS-LMS. Finally, atmospheric turbulence simulator is used to verify the improvement effect of cascaded LMS-LMS adaptive equalizer under different turbulence conditions. The experimental results show that when the coherence length is <inline-formula< <tex-math notation="LaTeX"<$r_{0} =1.6 $ </tex-math<</inline-formula< cm and the received optical power is −34 dBm, the system can transfer the information at a rate of 32 Gbps QPSK after using cascaded LMS-LMS adaptive equalizer, and the bit-error ratio (BER) is lower than the minimum limit of forward error correction (FEC, <inline-formula< <tex-math notation="LaTeX"<$3.8 \times 10 ^{-3}$ </tex-math<</inline-formula<). This paper can provide theoretical guidance for the performance optimization of free space QPSK optical signal transmission system. Free space optical communication quadrature phase shift keying atmospheric turbulence simulator cascaded LMS-LMS adaptive equalizer Electrical engineering. Electronics. Nuclear engineering Haifeng Yao verfasserin aut Lei Zhang verfasserin aut Shoufeng Tong verfasserin aut In IEEE Access IEEE, 2014 9(2021), Seite 130751-130757 (DE-627)728440385 (DE-600)2687964-5 21693536 nnns volume:9 year:2021 pages:130751-130757 https://doi.org/10.1109/ACCESS.2021.3113336 kostenfrei https://doaj.org/article/eda311a6160243b9bd0f59c2e934a711 kostenfrei https://ieeexplore.ieee.org/document/9540655/ kostenfrei https://doaj.org/toc/2169-3536 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 9 2021 130751-130757
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source	In IEEE Access 9(2021), Seite 130751-130757 volume:9 year:2021 pages:130751-130757
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topic_facet	Free space optical communication quadrature phase shift keying atmospheric turbulence simulator cascaded LMS-LMS adaptive equalizer Electrical engineering. Electronics. Nuclear engineering
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authorswithroles_txt_mv	Binyu Li @@aut@@ Haifeng Yao @@aut@@ Lei Zhang @@aut@@ Shoufeng Tong @@aut@@
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callnumber-first	T - Technology
author	Binyu Li
spellingShingle	Binyu Li misc TK1-9971 misc Free space optical communication misc quadrature phase shift keying misc atmospheric turbulence simulator misc cascaded LMS-LMS adaptive equalizer misc Electrical engineering. Electronics. Nuclear engineering 32 Gbps QPSK Optical Communication Technology Based on a New Equalizer in Atmospheric Turbulence
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topic_title	TK1-9971 32 Gbps QPSK Optical Communication Technology Based on a New Equalizer in Atmospheric Turbulence Free space optical communication quadrature phase shift keying atmospheric turbulence simulator cascaded LMS-LMS adaptive equalizer
topic	misc TK1-9971 misc Free space optical communication misc quadrature phase shift keying misc atmospheric turbulence simulator misc cascaded LMS-LMS adaptive equalizer misc Electrical engineering. Electronics. Nuclear engineering
topic_unstemmed	misc TK1-9971 misc Free space optical communication misc quadrature phase shift keying misc atmospheric turbulence simulator misc cascaded LMS-LMS adaptive equalizer misc Electrical engineering. Electronics. Nuclear engineering
topic_browse	misc TK1-9971 misc Free space optical communication misc quadrature phase shift keying misc atmospheric turbulence simulator misc cascaded LMS-LMS adaptive equalizer misc Electrical engineering. Electronics. Nuclear engineering
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title	32 Gbps QPSK Optical Communication Technology Based on a New Equalizer in Atmospheric Turbulence
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title_full	32 Gbps QPSK Optical Communication Technology Based on a New Equalizer in Atmospheric Turbulence
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title_sort	32 gbps qpsk optical communication technology based on a new equalizer in atmospheric turbulence
callnumber	TK1-9971
title_auth	32 Gbps QPSK Optical Communication Technology Based on a New Equalizer in Atmospheric Turbulence
abstract	In this paper, cascaded least mean square-least mean square (LMS-LMS) adaptive equalization scheme is proposed based on fiber coupling system, in order to improve the transmission performance of quadrature phase shift keying (QPSK) modulated optical signals in medium and weak turbulence channels. First, the transmission performance of QPSK optical signal in different atmospheric turbulence channels is simulated and analyzed according to the characteristics of optical fiber coupling system and the characteristics of atmospheric turbulence channel. Secondly, cascaded LMS-LMS equalization scheme is proposed, and its distortion signal is corrected based on the original simulation results to verify the effectiveness and robustness of LMS-LMS. Finally, atmospheric turbulence simulator is used to verify the improvement effect of cascaded LMS-LMS adaptive equalizer under different turbulence conditions. The experimental results show that when the coherence length is <inline-formula< <tex-math notation="LaTeX"<$r_{0} =1.6 $ </tex-math<</inline-formula< cm and the received optical power is −34 dBm, the system can transfer the information at a rate of 32 Gbps QPSK after using cascaded LMS-LMS adaptive equalizer, and the bit-error ratio (BER) is lower than the minimum limit of forward error correction (FEC, <inline-formula< <tex-math notation="LaTeX"<$3.8 \times 10 ^{-3}$ </tex-math<</inline-formula<). This paper can provide theoretical guidance for the performance optimization of free space QPSK optical signal transmission system.
abstractGer	In this paper, cascaded least mean square-least mean square (LMS-LMS) adaptive equalization scheme is proposed based on fiber coupling system, in order to improve the transmission performance of quadrature phase shift keying (QPSK) modulated optical signals in medium and weak turbulence channels. First, the transmission performance of QPSK optical signal in different atmospheric turbulence channels is simulated and analyzed according to the characteristics of optical fiber coupling system and the characteristics of atmospheric turbulence channel. Secondly, cascaded LMS-LMS equalization scheme is proposed, and its distortion signal is corrected based on the original simulation results to verify the effectiveness and robustness of LMS-LMS. Finally, atmospheric turbulence simulator is used to verify the improvement effect of cascaded LMS-LMS adaptive equalizer under different turbulence conditions. The experimental results show that when the coherence length is <inline-formula< <tex-math notation="LaTeX"<$r_{0} =1.6 $ </tex-math<</inline-formula< cm and the received optical power is −34 dBm, the system can transfer the information at a rate of 32 Gbps QPSK after using cascaded LMS-LMS adaptive equalizer, and the bit-error ratio (BER) is lower than the minimum limit of forward error correction (FEC, <inline-formula< <tex-math notation="LaTeX"<$3.8 \times 10 ^{-3}$ </tex-math<</inline-formula<). This paper can provide theoretical guidance for the performance optimization of free space QPSK optical signal transmission system.
abstract_unstemmed	In this paper, cascaded least mean square-least mean square (LMS-LMS) adaptive equalization scheme is proposed based on fiber coupling system, in order to improve the transmission performance of quadrature phase shift keying (QPSK) modulated optical signals in medium and weak turbulence channels. First, the transmission performance of QPSK optical signal in different atmospheric turbulence channels is simulated and analyzed according to the characteristics of optical fiber coupling system and the characteristics of atmospheric turbulence channel. Secondly, cascaded LMS-LMS equalization scheme is proposed, and its distortion signal is corrected based on the original simulation results to verify the effectiveness and robustness of LMS-LMS. Finally, atmospheric turbulence simulator is used to verify the improvement effect of cascaded LMS-LMS adaptive equalizer under different turbulence conditions. The experimental results show that when the coherence length is <inline-formula< <tex-math notation="LaTeX"<$r_{0} =1.6 $ </tex-math<</inline-formula< cm and the received optical power is −34 dBm, the system can transfer the information at a rate of 32 Gbps QPSK after using cascaded LMS-LMS adaptive equalizer, and the bit-error ratio (BER) is lower than the minimum limit of forward error correction (FEC, <inline-formula< <tex-math notation="LaTeX"<$3.8 \times 10 ^{-3}$ </tex-math<</inline-formula<). This paper can provide theoretical guidance for the performance optimization of free space QPSK optical signal transmission system.
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title_short	32 Gbps QPSK Optical Communication Technology Based on a New Equalizer in Atmospheric Turbulence
url	https://doi.org/10.1109/ACCESS.2021.3113336 https://doaj.org/article/eda311a6160243b9bd0f59c2e934a711 https://ieeexplore.ieee.org/document/9540655/ https://doaj.org/toc/2169-3536
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author2	Haifeng Yao Lei Zhang Shoufeng Tong
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up_date	2024-07-04T00:59:37.146Z
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32 Gbps QPSK Optical Communication Technology Based on a New Equalizer in Atmospheric Turbulence

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