Comparison of FBMC and OFDM With Adaptive Bit and Power Loading for CD-Constrained IM/DD Transmission Over 50-km SSMF

Filter bank multicarrier (FBMC) with offset quadrature amplitude modulation (OQAM) is a promising option for short-reach intensity modulation and direct detection (IM/DD) transmissions, as it can operate without a cyclic prefix (CP) and has lower out-of-band spectral/power leakage compared to conven...

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Published in:Journal of lightwave technology Vol. 42; no. 8; pp. 2702 - 2710
Main Authors: Zhang, Junwei, Tan, Heyun, Lu, Liwang, Wu, Xiong, Hong, Xiaojian, Fei, Chao, Lau, Alan Pak Tao, Lu, Chao
Format: Journal Article
Language:English
Published: New York IEEE 15.04.2024
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Adaptive bit and power loading
Algorithms
Chromatic dispersion (CD)
Filter bank multicarrier (FBMC)
Filter banks
High speed
Intensity modulation and direct detection (IM/DD)
Loading
Modulation
OFDM
Optical attenuators
Optical transmitters
Orthogonal Frequency Division Multiplexing
Orthogonal frequency division multiplexing (OFDM)
Quadrature amplitude modulation
Signal transmission
Symbols
ISSN:0733-8724, 1558-2213
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Abstract Filter bank multicarrier (FBMC) with offset quadrature amplitude modulation (OQAM) is a promising option for short-reach intensity modulation and direct detection (IM/DD) transmissions, as it can operate without a cyclic prefix (CP) and has lower out-of-band spectral/power leakage compared to conventional orthogonal frequency-division multiplexing (OFDM) with QAM. In this paper, we for the first time present a comprehensive comparison between high-speed IM/DD OFDM and FBMC over a chromatic dispersion (CD) constrained standard single-mode fiber (SSMF) channel. Simulation and experimental results show that FBMC exhibits better robustness against the CD-induced power fading. Compared with 0-point, 16-point, 32-point, and 64-point CP-based OFDM signals, the CP-free FBMC signal experimentally achieves significant subcarrier-SNR improvements of up to 6.5 dB, 5.6 dB, 3.7 dB, and 3.4 dB, respectively, after 50-km SSMF transmission. By using adaptive bit and power loading algorithm, 157-Gbit/s line rate and 130.3-Gbit/s net rate FBMC signal transmission over 50-km SSMF is achieved, which improves the net data rate by 26.6% compared to net-102.9-Gbit/s OFDM signal with a 32-point CP. Moreover, under the same line rate of 126.6 (131.7) Gbit/s, the adaptive bit and power loading FBMC not only increases the spectral efficiency (SE) by 6.25% (i.e., complete avoidance of inserting a CP), but also improves the receiver sensitivity by 2.9 (4.6) dB in comparison with the adaptive bit and power loading OFDM with a 32-point CP. Despite its higher computational complexity relative to OFDM, the high-speed FBMC system with superior gains shows great potential in CD-constrained IM/DD transmissions.
AbstractList Filter bank multicarrier (FBMC) with offset quadrature amplitude modulation (OQAM) is a promising option for short-reach intensity modulation and direct detection (IM/DD) transmissions, as it can operate without a cyclic prefix (CP) and has lower out-of-band spectral/power leakage compared to conventional orthogonal frequency-division multiplexing (OFDM) with QAM. In this paper, we for the first time present a comprehensive comparison between high-speed IM/DD OFDM and FBMC over a chromatic dispersion (CD) constrained standard single-mode fiber (SSMF) channel. Simulation and experimental results show that FBMC exhibits better robustness against the CD-induced power fading. Compared with 0-point, 16-point, 32-point, and 64-point CP-based OFDM signals, the CP-free FBMC signal experimentally achieves significant subcarrier-SNR improvements of up to 6.5 dB, 5.6 dB, 3.7 dB, and 3.4 dB, respectively, after 50-km SSMF transmission. By using adaptive bit and power loading algorithm, 157-Gbit/s line rate and 130.3-Gbit/s net rate FBMC signal transmission over 50-km SSMF is achieved, which improves the net data rate by 26.6% compared to net-102.9-Gbit/s OFDM signal with a 32-point CP. Moreover, under the same line rate of 126.6 (131.7) Gbit/s, the adaptive bit and power loading FBMC not only increases the spectral efficiency (SE) by 6.25% (i.e., complete avoidance of inserting a CP), but also improves the receiver sensitivity by 2.9 (4.6) dB in comparison with the adaptive bit and power loading OFDM with a 32-point CP. Despite its higher computational complexity relative to OFDM, the high-speed FBMC system with superior gains shows great potential in CD-constrained IM/DD transmissions.
Author Fei, Chao
Lu, Liwang
Wu, Xiong
Lau, Alan Pak Tao
Zhang, Junwei
Lu, Chao
Tan, Heyun
Hong, Xiaojian
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Snippet Filter bank multicarrier (FBMC) with offset quadrature amplitude modulation (OQAM) is a promising option for short-reach intensity modulation and direct...
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SubjectTerms Adaptive bit and power loading
Algorithms
Chromatic dispersion (CD)
Filter bank multicarrier (FBMC)
Filter banks
High speed
Intensity modulation and direct detection (IM/DD)
Loading
Modulation
OFDM
Optical attenuators
Optical transmitters
Orthogonal Frequency Division Multiplexing
Orthogonal frequency division multiplexing (OFDM)
Quadrature amplitude modulation
Signal transmission
Symbols
Title Comparison of FBMC and OFDM With Adaptive Bit and Power Loading for CD-Constrained IM/DD Transmission Over 50-km SSMF
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