Simultaneous Beam and User Selection for the Beamspace mmWave/THz Massive MIMO Downlink
Simultaneous Beam and User Selection for the Beamspace mmWave/THz Massive MIMO Downlink
Beamspace millimeter-wave (mmWave) and terahertz (THz) massive MIMO constitute attractive schemes for next-generation communications, given their abundant bandwidth and high throughput. However, their user and beam selection problem has not been efficiently addressed yet. Inspired by this challenge, we develop low-complexity solutions explicitly. In contrast to the zero forcing in …