User Oriented Transmit Antenna Selection in Massive Multi-User MIMO SDR Systems.
User Oriented Transmit Antenna Selection in Massive Multi-User MIMO SDR Systems.
复制标题
大规模多用户 MIMO SDR 系统中面向用户的发射天线选择
DOI:
10.3390/s20174867
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发表时间:
2020-08-28
期刊:
影响因子:
--
通讯作者:
Huo Y
中科院分区:
文献类型:
--
作者:
Zhong S;Feng H;Zhang P;Xu J;Huang L;Yuan T;Huo Y
A transmit antenna selection (TxAS) aided multi-user multiple-input multiple-output (MU-MIMO) system is proposed for operating in the MIMO downlink channel environments, which shows significant improvement in terms of higher data rate when compared to the conventional MU-MIMO systems operating without adopting TxAS, while maintaining low hardware costs. We opt for employing a simple yet efficient zero-forcing beamforming (ZFBF) linear precoding scheme at the transmitter in order to reduce the decoding complexity when considering users’ side. Moreover, considering that users within the same cell may require various qualities of service (QoS), we further propose a novel user-oriented smart TxAS (UOSTxAS) scheme, of which the main idea is to carry out AS based on the QoS requirements of different users. At last, we implement the proposed UOSTxAS scheme in the software defined radio (SDR) MIMO communication hardware platform, which is the first prototype hardware system that runs the UOSTxAS MU-MIMO scheme. Our results show that, by employing TxAS, the proposed UOSTxAS scheme is capable of offering higher data rates for priority users, while reasonably ensuring the performance of the common users requiring lower rates both in simulation and in the implemented SDR MIMO communication platform.
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