Zhongliang Sun

Sinopec (China)

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Yaojun Qiao

Beijing University of Posts and Telecommunications

Jinlong Wei

Peng Cheng Laboratory

Yueming Lu

Beijing University of Posts and Telecommunications

Xizi Tang

Beijing University of Posts and Telecommunications

Du Tang

Beijing University of Posts and Telecommunications

Jianwei Tang

Peng Cheng Laboratory

Zhaopeng Xu

China Centre for Resources Satellite Data and Application

Junpeng Liang

Peng Cheng Laboratory

Han Cui

Chengdu University

Weisheng Hu

Shanghai Jiao Tong University

Cooperative Institutions

Peng Cheng Laboratory

Beijing University of Posts and Telecommunications

Changchun University of Technology

Chinese Academy of Sciences

Peking University

Harbin Institute of Technology

Sinopec (China)

Zhejiang University

State Key Laboratory of Information Photonics and Optical Communications

Xi'an Jiaotong University

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A QPSK-Pilot Carrier Phase Recovery Algorithm with Improved MI for PS-64QAM Systems

Zhongliang Sun Jin Hang Hu Xuekai Xu Yueming Lu Yaojun Qiao

Filter-oriented carrier phase recovery algorithms with MI impairment are ana-lyzed in PS systems. A QPSK-pilot scheme is investigated to compensate the penalty in a PS-64QAM system, achieving approximated 1 bit/symbol gain in lower SNRs.

Carrier recovery

10.1364/acpc.2020.m4a.216

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Design and Research Based on Fuzzy PID-Parameters Self-Tuning Controller with MATLAB

International Conference on Advanced Computer Theory and Engineering (2008)

Xiaokan Wang Zhongliang Sun WangLei Feng Dong-qing

Designed a parameter self-tuning PID-controller based on fuzzy control, which can adjust PID-parameters according to error and change-in-error. A simulation study of the system shows that the controller possesses both the precise character of PID controller and the flexible advantage of fuzzy controller. It can eliminate the steady error of the system promptly.

Open-loop controller

10.1109/icacte.2008.9

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Citations (24)

Modified QPSK partition algorithm based on MAP estimation for probabilistically-shaped 16-QAM

Optics Communications (2020)

Jin Hang Hu Zhongliang Sun Xuekai Xu Mengqi Guo Xizi Tang

QAM

Noisy-channel coding theorem

Partition problem

10.1016/j.optcom.2020.126726

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Citations (5)

Fast and Accurate Estimation of MDL - Induced SNR Penalty in SDM Link with Non-Uniform Noise Loading

Tonghui Ji Qi Wu Zhaopeng Xu Honglin Ji Yang Yu

Link (geometry)

Minimum description length

10.1109/acp/ipoc63121.2024.10809984

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Simulation and Optimization of Parameters on DC Motor Double Closed-Loop Control System Based on Simulink

International Conference on Intelligent Human-Machine Systems and Cybernetics (2009)

Xiaokan Wang Zhongliang Sun Lei Wang Shou-ping Huang

When transient performance requirement is higher in the control system and single-loop control system can not meet the requirements, we implement the multi-loop control and parameter optimization in line with the inner loop to outer loop of the order. This article takes double-loop DC motor speed control system as an example, and uses simulation optimization methodology to design of two PI regulator parameters, which make the system of dynamic and the steady-state static indexes reach the design requirements.

Inner loop

Transient (computer programming)

Loop fission

Double loop

10.1109/ihmsc.2009.46

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Citations (12)

112-Gb/s PAM4 with Joint Pre- and Post-Equalization for Data Center Interconnects

2019 Asia Communications and Photonics Conference (ACP) (2019)

Mengqi Guo Yaojun Qiao Xizi Tang Shuangyue Liu Zhongliang Sun

A joint pre- and post-equalization method is proposed to compensate the bandwidth-limitation impairments in a 112-Gb/s PAM4 system. The experimental results show ∼2.5-dB improvement in receiver sensitivity after applying optimal pre- and post-equalization coefficients.

Blind equalization

Source

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Citations (5)

Criteria on Utility Designing of Convex Optimization in FDMA Networks

Zhongliang Sun Wenjun Xu Zhiqiang He Kai Niu

In this paper, we investigate the network utility maximization problem in FDMA systems. We summarize with a suite of criteria on designing utility functions so as to achieve the global optimization convex. After proposing the general form of the utility functions, we present examples of commonly used utility function forms that are consistent with the criteria proposed in this paper, which include the well-known proportional fairness function and the sigmoidal-like functions. In the second part of this paper, we use numerical results to demonstrate a case study based on the criteria mentioned above, which deals with the subcarrier scheduling problem with dynamic rate allocation in FDMA system.

Utility maximization problem

Maximization

Frequency-division multiple access

Sigmoid function

10.1109/iccw.2008.13

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Citations (2)

Low-complexity Frequency and Time Domain Hybrid Learned Digital Backpropagation

Asia Communications and Photonics Conference 2021 (2021)

Zhen Wu Du Tang Zhongliang Sun Yaojun Qiao

A low-complexity learned digital backpropagation based on frequency and time domain hybrid chromatic dispersion compensation is proposed, which reduces the complexity significantly compared to the existing implementation without sacrificing performance.

Backpropagation

10.1364/acpc.2021.t4a.71

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Impact of Super-Gaussian Distribution on System Gain of Probabilistic Shaping 64QAM

Zhongliang Sun Du Tang Yingjie Jiang Zhen Wu Yaojun Qiao

We investigated the gain provided by optimal-super-Gaussian in the DP-PCS-64QAM system. Results indicate that the maximum 0.24/0.18/0.15-dB $Q^{2}$ factor gain is achieved compared with Maxwell-Bolzmann distribution in the 96-GBaud 500/1000/1500-km transmission system, respectively.

Transmission system

10.1109/oecc56963.2023.10209724

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Trellis-Coded Modulation-Enabled Probabilistic Shaping With Simplified Viterbi Decoder for Bandwidth-Limited IMDD Systems

IEEE photonics journal (2023)

Han Cui Zhongliang Sun Xiaoqian Huang Du Tang Fei Xie

In this article, trellis-coded modulation-enabled probabilistic shaping (TEPS) scheme with a simplified Viterbi decoder is proposed. Trellis-coded modulation (TCM) is embedded in the probabilistic shaping (PS) technique to improve the performance of PS signals in bandwidth-limited intensity modulation and direct detection (IMDD) systems. Further, to reduce the calculation complexity of TCM decoding, the constellation partition decision-assisted (CPDA)-Viterbi decoder is proposed which decides the received signal before decoding to reduce the branches. To verify the performance of the proposed scheme, a 32-GBaud TEPS-four-level pulse-amplitude modulation (PAM4) experimental system with 10G-class O-band directly-modulated laser (DML) is built over a 20-km standard single-mode fiber (SSMF) transmission link. The experimental results show that TEPS-PAM4 achieved up to 1.80-dB higher receiver sensitivity than PS-PAM4 at 7% forward error correction (FEC) limit with the same net rate. Moreover, with the multiplications reduced by up to 45.7% compared with the Viterbi decoder, TEPS-PAM4 with CPDA-Viterbi decoder has up to 1.50-dB higher receiver sensitivity limit than PS-PAM4 at 7% FEC.

Viterbi decoder

Viterbi algorithm

Iterative Viterbi decoding

Trellis modulation

Modulation (music)

Forward error correction

10.1109/jphot.2023.3314028

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Citations (3)