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On the beamforming of LEO earth fixed cells

This paper investigates the impact of beamforming codebook update period on the signal to noise ratio (SNR) performance of low earth orbit (LEO) earth-fixed beams. To combat the SNR degradation due to non-timely beam updates, we propose the combined algorithm of beam angle compensation and dynamic codebook prediction. The proposed algorithm is able to constraint the SNR degradation at the target under a designed threshold.