Probabilistic amplitude shaping for a 64-QAM OFDM W-band RoF system

Kaiquan Wu; Jing He; Zhihua Zhou; Jin Shi

doi:10.1109/LPT.2019.2917925

Probabilistic amplitude shaping for a 64-QAM OFDM W-band RoF system

Kaiquan Wu, Jing He (Corresponding author), Zhihua Zhou, Jin Shi

Research output: Contribution to journal › Article › Academic › peer-review

18 Citations (Scopus)

163 Downloads (Pure)

Abstract

In this letter, probabilistic amplitude shaping (PAS) is performed in the case of orthogonal frequency division multiplexing (OFDM) by combining with orthogonal circulant matrix transform (OCT) precoding. Thanks to the precoding method, one optimized probabilistic distribution is globally implemented across 240 subcarriers by merely one distribution matcher (DM). The proposed probabilistic shaping scheme for OFDM is experimentally demonstrated in a 64-ary quadrature amplitude modulation (QAM) W-band radio-over-fiber (RoF) system using direct-detection (DD), with 20-km single-mode fiber (SMF), and 0.5-m free-space transmission. The experimental results show that, compared to the uniform 64-QAM, there is 1.07-dB shaping gain for system sensitivity at BER of 10 -4 . Meanwhile, it inherits the advantage of flexible capacity granularity from the conventional single-carrier PAS.

Original language	English
Article number	8718998
Pages (from-to)	1076 - 1079
Number of pages	4
Journal	IEEE Photonics Technology Letters
Volume	31
Issue number	13
DOIs	https://doi.org/10.1109/LPT.2019.2917925
Publication status	Published - 1 Jul 2019
Externally published	Yes

Keywords

OFDM
Probabilistic amplitude shaping
QAM
millimeter wave
radio over fiber communication

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10.1109/LPT.2019.2917925

PTL_PAS_WKQ_R2_1Final author version , 860 KB

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abstract = "In this letter, probabilistic amplitude shaping (PAS) is performed in the case of orthogonal frequency division multiplexing (OFDM) by combining with orthogonal circulant matrix transform (OCT) precoding. Thanks to the precoding method, one optimized probabilistic distribution is globally implemented across 240 subcarriers by merely one distribution matcher (DM). The proposed probabilistic shaping scheme for OFDM is experimentally demonstrated in a 64-ary quadrature amplitude modulation (QAM) W-band radio-over-fiber (RoF) system using direct-detection (DD), with 20-km single-mode fiber (SMF), and 0.5-m free-space transmission. The experimental results show that, compared to the uniform 64-QAM, there is 1.07-dB shaping gain for system sensitivity at BER of 10 -4 . Meanwhile, it inherits the advantage of flexible capacity granularity from the conventional single-carrier PAS.",

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AU - Wu, Kaiquan

AU - He, Jing

AU - Zhou, Zhihua

AU - Shi, Jin

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Y1 - 2019/7/1

N2 - In this letter, probabilistic amplitude shaping (PAS) is performed in the case of orthogonal frequency division multiplexing (OFDM) by combining with orthogonal circulant matrix transform (OCT) precoding. Thanks to the precoding method, one optimized probabilistic distribution is globally implemented across 240 subcarriers by merely one distribution matcher (DM). The proposed probabilistic shaping scheme for OFDM is experimentally demonstrated in a 64-ary quadrature amplitude modulation (QAM) W-band radio-over-fiber (RoF) system using direct-detection (DD), with 20-km single-mode fiber (SMF), and 0.5-m free-space transmission. The experimental results show that, compared to the uniform 64-QAM, there is 1.07-dB shaping gain for system sensitivity at BER of 10 -4 . Meanwhile, it inherits the advantage of flexible capacity granularity from the conventional single-carrier PAS.

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Probabilistic amplitude shaping for a 64-QAM OFDM W-band RoF system

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Keywords

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