Spanning Tree Method for Over-the-Air Channel Calibration in 6G Cell-Free Massive MIMO
Cell-free massive multiple-input multiple-output (MIMO) is an attractive network in 6G communications that significantly increases the spectral efficiency. Operating in time-division duplex (TDD) mode, the downlink beamforming is achieved by the estimated uplink channel, which is equal to the downli...
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Veröffentlicht in: | IEEE transactions on wireless communications 2023-08, Vol.22 (8), p.5567-5582 |
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