Decoupling Beam Steering and User Selection for MU-MIMO 60-GHz WLANs
Decoupling Beam Steering and User Selection for MU-MIMO 60-GHz WLANs
复制标题
MU-MIMO 60 GHz WLAN 的解耦波束控制和用户选择
DOI：
10.1109/tnet.2018.2866037
复制
发表时间：
2018
期刊：
影响因子：
--
通讯作者：
E. Knightly
中科院分区：
文献类型：
--
作者：
Yasaman Ghasempour;Muhammad Kumail Haider;E. Knightly
60 GHz的多用户传输有望通过模拟和数字波束成形提高下一代WLAN的吞吐量。为了最大化容量，模拟波束需要与用户选择和数字权重联合配置;然而，联合最大化需要过大的训练和反馈开销。在本文中，我们规模多用户60 GHz WLAN吞吐量通过设计一个低复杂度的结构解耦波束转向和用户选择，使模拟波束训练用户选择之前。我们引入了两类框架，包括：1）通过最小化从模拟训练获得的理想化波束图案的重叠来进行用户的单次选择，以及2）通过顺序训练来更好地预测用户间干扰的干扰感知增量添加。我们使用软件定义无线电和商用60 GHz收发器实现了一个可编程测试平台，并进行空中测量，以收集不同室内WLAN部署的信道轨迹。测量进行使用12单元相控天线阵列以及喇叭天线具有不同的方向性增益，以评估实际的60 GHz系统的性能。使用基于跟踪的仿真和高分辨率60 GHz信道模型，我们表明，我们的去耦结构经历了不到5%的性能损失相比，通过联合用户波束选择的最大可实现的速率。
Multi-user transmission at 60 GHz promises to increase the throughput of next-generation WLANs via both analog and digital beamforming. To maximize the capacity, analog beams need to be jointly configured with user selection and digital weights; however, joint maximization requires prohibitively large training and feedback overhead. In this paper, we scale multi-user 60-GHz WLAN throughput via design of a low-complexity structure for decoupling beam steering and user selection such that analog beam training precedes user selection. We introduce a two-class framework comprising: 1) single-shot selection of users by minimizing overlap of their idealized beam patterns obtained from analog training and 2) interference-aware incremental addition of users via sequential training to better predict inter-user interference. We implement a programmable testbed using software-defined radios and commercial 60-GHz transceivers and conduct over-the-air measurements to collect channel traces for different indoor WLAN deployments. Measurements are conducted using a 12-element phased antenna array as well as horn antennas with different directivity gains to evaluate the performance of practical 60-GHz systems. Using trace-based emulations and high resolution 60-GHz channel models, we show that our decoupling structure experiences less than 5% performance loss compared with maximum achievable rates via joint user-beam selection.
DOI：
10.1145/3241539.3241556
发表时间：
2018-10
期刊：
Proceedings of the 24th Annual International Conference on Mobile Computing and Networking
影响因子：
--
作者：
Yasaman Ghasempour;Muhammad Kumail Haider;C. Cordeiro;Dimitrios Koutsonikolas;E. Knightly
通讯作者：
Yasaman Ghasempour;Muhammad Kumail Haider;C. Cordeiro;Dimitrios Koutsonikolas;E. Knightly