Computer Science

Computer Science ›› 2019, Vol. 46 ›› Issue (8): 121-126.doi: 10.11896/j.issn.1002-137X.2019.08.020

• Network & Communication • Previous Articles     Next Articles

Improved Tomlinson-Harashima Precoding Based on Greedy Algorithm in High-speed Mobile Scenarios

LIAO Yong1, YANG Xin-yi1, XIA Mao-han2, WANG Bo2, LI Shou-zhi2, SHEN Xuan-fan1   

  1. (Center of Communication and TT&C,Chongqing University,Chongqing 400044,China)1
    (School of Microelectronics and Communication Engineering,Chongqing University,Chongqing 400044,China)2
  • Received:2018-07-09 Online:2019-08-15 Published:2019-08-15

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Abstract: Aiming at the technical challenges brought by the fast time-selective and frequency-selective channel characteristics of high-speed mobile to Multiple Input Multiple Output (MIMO)system precoding,this paper proposed a user scheduling scheme based on greedy algorithm,which schedules and ranks users with the goal of maximizing channel capacity.Further,this paper proposed an improved Tomlinson-Harashima precoding (THP)algorithm based on greedy algorithm for user scheduling.The channel matrix is reconstructed according to the user scheduling result,and the reconstructed channel matrix is applied to the THP algorithm to optimize the traditional THP algorithm,improving the precoding precision.The simulation results show that the proposed precoding has better Bit Error Ratio (BER)performance and channel capacity than traditional precodings,and its robust performance is also better,which verifies that the proposed algorithm can adapt to high-speed mobile scenarios effectively

Key words: Greedy algorithm, High-speed scenarios, MIMO, Tomlinson-Harashima precoding, User scheduling

CLC Number: 

  • TN929.5
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