Random Unitary Beamforming with Partial Feedback for Multi-Antenna Downlink Transmission Using Multiuser Diversity

Multiuser diversity is well known to require a large number of users but, in this case, the requirement of a large amount of feedback (which is proportional to the number of users) may be rather critical in limiting practical applications of multiuser diversity schemes. In this paper, we study the problem of downlink transmission in multi-antenna wireless communication systems using multiuser diversity and partial user feedback. The key idea of …