Low Complexity Hybrid Beamforming For Uplink Multiuser Mmwave Mimo Systems
2017 IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE (WCNC)(2017)
摘要
This paper considers a low-complexity hybrid beamforming (HBF) for uplink multiuser mmWave MIMO systems. The proposed scheme employs a two-stage beamforming design. In the first stage, the base station (BS) analog beamforming is designed to maximize the kth user's signal-to-interference-plus-noise-ratio (SINR) in single-carrier systems and to maximize the sum rate's upper bound of uplink virtual cooperative users in orthogonal frequency division multiplexing (OFDM) based systems (also called multi-carrier systems), respectively. Furthermore, we perform phases extraction and quantize phase control on the obtained BS analog beamforming. In the second stage, the BS digital beamforming is designed by performing minimum mean square error (MMSE) with the low-dimensional effective channel. The proposed schemes are simulated in both ideal Rayleigh fading channels and sparsely scattered mmWave channels, approaching the sum rate performance of the full digital solution in single-carrier case and of the virtual uplink user cooperation scheme in multi-carrier case, respectively. The simulation results demonstrate that the proposed schemes outperform the existing HBF designs for uplink multiuser mmWave MIMO systems.
更多查看译文
关键词
low complexity hybrid beamforming,uplink multiuser mmwave MIMO systems,two-stage beamforming design,base station analog beamforming,signal-to-interference-plus-noise-ratio,SINR,single-carrier systems,orthogonal frequency division multiplexing,OFDM,multi-carrier systems,digital beamforming,minimum mean square error,MMSE,low-dimensional effective channel,Rayleigh fading channels,mmWave channels,virtual uplink user cooperation scheme,multi-carrier case,uplink multiuser mmWave MIMO systems
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络