Study On Optical Communications, Volume. 50, Issue 2, 22005801(2024)

Deep Learning based Channel Estimation in PLC Communication

Tiancheng JING1, Hongguang DUAN1、*, Xu ZHAO2, and Jiaxin ZHANG1
Author Affiliations
  • 1School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
  • 2Beijing Smartchip Microelectronics Technology Co., Ltd., Beijing 102200, China
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    Figures & Tables(11)
    Block diagram of PLC system
    Block diagram of LSTM
    Block diagram of DnLSTM neural network
    Block diagram of simulation
    Estimated results of different methods for channel estimation after normalization when SNR=6 dB
    BER using 4 and 2 preamble symbols for channel estimation
    BER per OFDM symbol using 2 and 4 preamble symbols for channel estimation
    BER using 2,3,4 and 5 preamble symbols for channel estimation
    Scatter plots of constellation points equalized with channel response estimated with DnLSTM and MMSE (SNR=10 dB)
    • Table 1. DnLSTM neural network structure

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      Table 1. DnLSTM neural network structure

      序号结构参数
      1输入层阶数为4×128的矩阵。
      2LSTM层输入为4×128的矩阵,输出为1×128的矩阵。
      3DnNet reshape层输入为1×128的矩阵,输出为8×16×1的立方矩阵。
      4DnNet第1层Conv:3组,3×3×1,跨步值:1×1,填充:“same”,激活函数:Relu。
      5DnNet第2~5层Conv:3组,3×3×3,跨步值:1×1,填充:“same”,归一化层:LN,激活函数:Relu。
      6DnNet第6层Conv:1组,3×3×3,跨步值:1×1,填充:“same”。
      7DnNet reshape层输入为8×16×1的立方矩阵,输出为1×128的矩阵。
      8DnNet减法层(substract层)输入为序号2和序号7的输出,输出为LSTM层输出减去序号7的reshape层输出。
    • Table 2. Parameters for simulation

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      Table 2. Parameters for simulation

      参数名称数值
      帧载荷符号数量100
      前导符号数量4
      FFT点数128
      使用的子载波11~118
      CP长度26
      调制方式16QAM
      信号最低频率/MHz1.953
      信号最高频率/MHz11.96
      信道编码Turbo码(码率:1/4)
      采样频率/MHz25
      载波频偏/Hz900
      信道模型线性周期时变信道模型[16]+AWGN、色噪声、脉冲噪声和混合噪声
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    Tiancheng JING, Hongguang DUAN, Xu ZHAO, Jiaxin ZHANG. Deep Learning based Channel Estimation in PLC Communication[J]. Study On Optical Communications, 2024, 50(2): 22005801

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    Paper Information

    Category: Research Articles

    Received: Feb. 27, 2023

    Accepted: --

    Published Online: Apr. 9, 2024

    The Author Email: DUAN Hongguang (duanhg@cqupt.edu.cn)

    DOI:10.13756/j.gtxyj.2024.220058

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