An antenna array can control the directivity and shape of the transmitted signal. The signal strength at the receiver is maximized using maximum ratio beamforming, to support higher data speeds. The strength can also be minimized using zeroforcing beamforming, to protect unintended receivers from disturbances. In the fourth video of this series, Prof. Emil Björnson demonstrates these categories experimentally using overtheair transmission of a mmWave signal and explains how one achieves them by phaseshifting the transmitted signals. Theory and practical utilization fit together, in both lineofsight and nonlineofsight propagation. Beamforming is used in all 5G systems, both in sub6 GHz and mmWave bands.

The experiments are carried out using the TMYTEK Developer Kit https://www.tmytek.com/solutions/mmwa... that the company kindly lent us. This is not a sponsored video.

Emil Björnson is an IEEE Fellow and a Professor of Wireless Communication at the KTH Royal Institute of Technology, Sweden. Website: http://ebjornson.com/research

#5g #6g #mmwave #beamforming #wireless #waves #communication #propagation #constructive #destructive #interference #zeroforcing #SNR