Maximum ratio and zero-forcing beamforming [Part 4, Fundamentals of mmWave communication]

5G NR
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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 zero-forcing beamforming, to protect unintended receivers from disturbances. In the fourth video of this series, Prof. Emil Björnson demonstrates these categories experimentally using over-the-air transmission of a mmWave signal and explains how one achieves them by phase-shifting the transmitted signals.

Theory and practical utilization fit together, in both line-of-sight and non-line-of-sight propagation. Beamforming is used in all 5G systems, both in sub-6 GHz and mmWave bands.

Maximum ratio and zero-forcing beamforming
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YouTube: :point_right: Maximum ratio and zero-forcing beamforming [Part 4, Fundamentals of mmWave communication] - YouTube

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Fundamentals of mmWave communication - 5 videos

  1. Beamforming directivity Beamforming directivity [Part 1, Fundamentals of mmWave communication]

  2. Wireless propagation losses Wireless propagation losses [Part 2, Fundamentals of mmWave communication]

  3. Constructive and destructive interference Constructive and destructive interference [Part 3, Fundamentals of mmWave communication]

  4. Maximum ratio and zero-forcing beamforming Maximum ratio and zero-forcing beamforming [Part 4, Fundamentals of mmWave communication]

  5. Beamwidth, beam pattern, and sensing Beamwidth, beam pattern, and sensing [Part 5, Fundamentals of mmWave communication]