Double deep learning for joint phase-shift and beamforming based on cascaded channels in ris-assisted mimo networks

HIGHLIGHTS

SUMMARY

Estimating cascaded channels often leads to complicated joint phase shift and beamforming because it is difficult to explicitly express the end-to-end channel capacity in terms of the cascaded channels, particularly when the multiple antennas are applied at both the source and destination nodes. Joint phase shift and beamforming based on both individual and cascaded channels have been proposed. The phases of the RIS are also optimized iteratively: at one time, only the phase of one RIS element is optimized while all other phases are fixed. Particularly for the MIMO RIS network, iterative . . .

 



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