TY  - GEN
A1  - Han, Y
A1  - Jin, S
A1  - Zhang, J
A1  - Zhang, J
A1  - Wong, K-K
KW  - Array signal processing
KW  -  Receivers
KW  -  Uplink
KW  -  Discrete Fourier transforms
KW  -  Fading channels
KW  -  Downlink
KW  -  MIMO communication
N2  - This paper studies analog beam selection schemes of discrete Fourier transform (DFT) based hybrid beamforming systems. We first derive approximations of the achievable rates when maximum-ratio combining (MRC) receiver and maximum-ratio transmitting (MRT) precoder are used in the uplink and downlink, respectively. It is shown that the achievable rate of the hybrid beamforming system is improved with the increase of the number of radio frequency chains. Also, it is found that the orthogonality condition among the line-of-sight (LoS) paths from different users directly determines the interference cancellation capability of the MRC receiver or the MRT precoder. Based on our analytical results, we propose two novel DFT beam selection schemes, referred to as exhausted searching and per-user selection. Numerical results show that the first scheme achieves higher rate while the second one is a simple suboptimal strategy with low complexity, which is practically more attractive.
ID  - discovery10055175
PB  - IEEE
UR  - https://doi.org/10.23919/APCC.2017.8304065
N1  - This version is the author accepted manuscript. For information on re-use, please refer to the publisher?s terms and conditions.
TI  - Analog beam selection schemes of DFT-based hybrid beamforming multiuser systems
AV  - public
Y1  - 2018/03/01/
EP  - 6
ER  -