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.