Auxiliary beam pair design in mmWave cellular systems with hybrid precoding and limited feedback


Dalin Zhu, Junil Choi, and Robert W. Heath, Jr.


To appear in Proc. ICCASP 2016, Shanghai, April.


Auxiliary beam pairs are proposed in millimeter-wave cellular systems for closed-loop hybrid precoding. Pairs of custom designed analog beams are formed to help acquire channel information. It is shown via simulations that auxiliary beam pairs have lower complexity and better achievable rates with a moderate amount of feedback, compared to conventional beam training methods.