Predictor Antenna for Robust Non Reciprocity based Beamforming at High Speed

In this paper, we show for the first time, based on channels from real urban environments, that although non reciprocity based beamformers (such as Discrete Fourier Transform beamforming) are more robust to high velocity than reciprocity based beamformers (such as maximum ratio transmission), they can still benefit from predictor antenna based channel prediction, in non line-of-sight propagation environments, due to the impact of small-scale fading within beams. The evaluation was conducted with channels from a massive multiple input multiple output antenna with 64 elements.