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.