Journal of Systems Engineering and Electronics ›› 2010, Vol. 32 ›› Issue (7): 1365-1368.doi: 10.3969/j.issn.1001506X.2010.07.003

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Precoding method based on channel extrapolation

ZHU Lei1,2,3,4, XIONG Yong1,2,3, YANG Xiumei1,2,3   

  1. 1. Shanghai Inst. of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China; 2. Shanghai Research Center of Wireless Communication, Shanghai 200335, China;
    3. Key Laboratory of Wireless Sensor Networking and Communications, Chinese Academy of Sciences, Shanghai 200335, China;
    4. Graduate Univ. of Chinese Academy of Sciences, Beijing 100049, China)
  • Online:2010-07-20 Published:2010-01-03

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Abstract:

To solve the mismatch between precoding matrix and the channel, which is caused by the feedback delay, a precoding method based on channel prediction is proposed. In this method, by exploiting the channel information of the current and the last two successive slots, the channel matrix of the future can be extrapolated. According to the forecasting channel information, a precoding matrix is selected and sent to the transmitter to counteract the influence of feedback delay. The simulation results show that the proposed method can significantly mitigate the performance degradation due to the feedback delay.

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