@conference {863, title = {Adaptive hybrid precoding and combining in mmWave multiuser MIMO systems based on compressed covariance estimation}, booktitle = {IEEE International Workshop on Computational Advances in Multi-Sensor Adaptive Processing (CAMSAP)}, year = {2015}, month = {December, 2015}, keywords = {compass, mmWave}, author = {R. M{\'e}ndez-Rial and Nuria Gonz{\'a}lez-Prelcic and R. W. Heath Jr.} }