A study on the zero-forcing beamforming （ZFBF） scheme with antenna selection at user terminals in downlink multi-antenna multi-user systems is presented. Simulation results show that the proposed ZFBF scheme with re...A study on the zero-forcing beamforming （ZFBF） scheme with antenna selection at user terminals in downlink multi-antenna multi-user systems is presented. Simulation results show that the proposed ZFBF scheme with receiver antenna selection （ZFBF-AS） achieves considerable throughput improvement over the ZFBF scheme with single receiver antenna. The results also show that, with multi-user diversity, the ZFBF-AS scheme approaches the throughput performance of the ZFBF scheme using all receiver antennas （ZFBF-WO-AS） when the base station adopts semi-orthogonal user selection （SUS） algorithm, and achieves larger throughput when the base station adopts the Round-robin scheduling algorithm. Compared with ZFBF-WO-AS, the proposed ZFBF-AS scheme can reduce the cost of user equipments and the channel state information requirement at the transmitter （CSIT） as well as the multiuser scheduling complexity at the transmitter.展开更多
设备直通通信通过复用传统蜂窝网络的频带资源,能够充分利用邻近通信对之间良好的信道环境,大幅度降低移动终端能耗,提升系统吞吐量,增加接入链路数目,改善用户的服务质量(quality of service,QoS)。但是频带复用会带来同频干扰,因此资...设备直通通信通过复用传统蜂窝网络的频带资源,能够充分利用邻近通信对之间良好的信道环境,大幅度降低移动终端能耗,提升系统吞吐量,增加接入链路数目,改善用户的服务质量(quality of service,QoS)。但是频带复用会带来同频干扰,因此资源分配机制的设计受到了广泛的重视。优化了能耗、系统频带利用率、能效(频带利用率与终端总能耗的比值)、接入链路数目和最差接入用户性能这5个系统核心性能指标,与此同时保证所有接入链路的QoS需求。通过仿真,验证了所提算法性能并观察分析了各性能指标优化间的折中关系。展开更多
基金supported by the National Natural Science Foundation of China (60496314)the National High Technology Research and Development Program of China (2006AA01Z266).
文摘A study on the zero-forcing beamforming （ZFBF） scheme with antenna selection at user terminals in downlink multi-antenna multi-user systems is presented. Simulation results show that the proposed ZFBF scheme with receiver antenna selection （ZFBF-AS） achieves considerable throughput improvement over the ZFBF scheme with single receiver antenna. The results also show that, with multi-user diversity, the ZFBF-AS scheme approaches the throughput performance of the ZFBF scheme using all receiver antennas （ZFBF-WO-AS） when the base station adopts semi-orthogonal user selection （SUS） algorithm, and achieves larger throughput when the base station adopts the Round-robin scheduling algorithm. Compared with ZFBF-WO-AS, the proposed ZFBF-AS scheme can reduce the cost of user equipments and the channel state information requirement at the transmitter （CSIT） as well as the multiuser scheduling complexity at the transmitter.
文摘设备直通通信通过复用传统蜂窝网络的频带资源,能够充分利用邻近通信对之间良好的信道环境,大幅度降低移动终端能耗,提升系统吞吐量,增加接入链路数目,改善用户的服务质量(quality of service,QoS)。但是频带复用会带来同频干扰,因此资源分配机制的设计受到了广泛的重视。优化了能耗、系统频带利用率、能效(频带利用率与终端总能耗的比值)、接入链路数目和最差接入用户性能这5个系统核心性能指标,与此同时保证所有接入链路的QoS需求。通过仿真,验证了所提算法性能并观察分析了各性能指标优化间的折中关系。
