TY - JOUR
T1 - Analog Versus Hybrid Precoding for Multiuser Massive MIMO with Quantized CSI Feedback
AU - Zhao, Yaqiong
AU - Xu, Wei
AU - Xu, Jindan
AU - Jin, Shi
AU - Wang, Kezhi
AU - Alouini, Mohamed-Slim
N1 - KAUST Repository Item: Exported on 2020-10-01
PY - 2020/6/3
Y1 - 2020/6/3
N2 - In this letter, we study the performance of a downlink multiuser massive multiple-input multiple-output (MIMO) system with sub connected structure over limited feedback channels. Tight rate approximations are theoretically analyzed for the system with pure analog precoding and hybrid precoding. The effect of quantized analog and digital precoding is characterized in the derived expressions. Furthermore, it is revealed that the pure analog precoding outperforms the hybrid precoding using maximal-ratio transmission (MRT) or zero forcing (ZF) under certain conditions, and we theoretically characterize the conditions in closed form with respect to signal-to-noise ratio (SNR), the number of users and the number of feedback bits. Numerical results verify the derived conclusions on both Rayleigh channels and mmWave channels.
AB - In this letter, we study the performance of a downlink multiuser massive multiple-input multiple-output (MIMO) system with sub connected structure over limited feedback channels. Tight rate approximations are theoretically analyzed for the system with pure analog precoding and hybrid precoding. The effect of quantized analog and digital precoding is characterized in the derived expressions. Furthermore, it is revealed that the pure analog precoding outperforms the hybrid precoding using maximal-ratio transmission (MRT) or zero forcing (ZF) under certain conditions, and we theoretically characterize the conditions in closed form with respect to signal-to-noise ratio (SNR), the number of users and the number of feedback bits. Numerical results verify the derived conclusions on both Rayleigh channels and mmWave channels.
UR - http://hdl.handle.net/10754/663650
UR - https://ieeexplore.ieee.org/document/9107073/
U2 - 10.1109/lcomm.2020.2999646
DO - 10.1109/lcomm.2020.2999646
M3 - Article
SN - 1089-7798
SP - 1
EP - 1
JO - IEEE Communications Letters
JF - IEEE Communications Letters
ER -