Mr. Ming Lin Profile

Ming Lin

at Guangdong Univ. of Technology

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Proceedings Article | 20 December 2019 Paper

Amplitude-phase precoding scheme for high speed ROF-MIMO systems

Rui Li, Qi Zhang, Xiangjun Xin, Feng Tian, Naijin Liu, Qinghua Tian, Wei Zhang, Ming Lin, Yang Wang, Yongjun Wang

Proceedings Volume 11209, 112094L (2019) https://doi.org/10.1117/12.2549912

KEYWORDS: Radio over Fiber, Orthogonal frequency division multiplexing, Modulation, Antennas, Radio optics, Demodulation, Roads, Distortion, Optical components, Complex systems

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An amplitude-phase precode method that based on a high speed ROF-MIMO system is proposed to solve the distortion problem due to the features of optical devices and link damages. This method uses the digital predistortion algorithm model，which is based on Weierstrass theorem. This could precompensation to the ROF links and reduce the influence of nonlinear characteristics of optical devices such as erbium-doped fiber amplifiers on system signal transmission, and solve the sensitivity of QAM, OFDM and other non-constant envelope modulation signals to system distortion. Then the Minimum Mean Square Error (MMSE) precoding method is used to optimize the spatial characteristics of the MIMO transmission signal to solve the signal interference problem, so as to reduce the bit error rate of the system and reduce the complexity of digital signal processing at the user terminal. The simulation results show that the bit error rate （BER） performance of ROF system with the proposed amplitude-phase precode method is lower than 4*10^-4 during the transmitting 10 Gb/s 16QAM-OFDM signal in 20km standard single model fiber. The proposed scheme has the obvious lower bit error rate than the non-precode high speed ROF-MIMO system. Therefore, the proposed scheme improves the base station and antenna array coverage, at same time, reduce the complexity of terminal unit and increase the stability of the system transmission.

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