论文标题
无细胞MMWave的束对准巨大的MU-MIMO上行链路
Beam Alignment for the Cell-Free mmWave Massive MU-MIMO Uplink
论文作者
论文摘要
毫米波（MMWAVE）无细胞的大型多用户（MU）多输入多输出（MIMO）系统结合了MMWave频率下可用的大带宽以及改进的无单元系统的覆盖范围。但是，要打击MMWave频率的高路径损失，用户设备（UES）必须在有意义的方向上形成光束，即到附近的接入点（AP）。同时，多个UES应避免传输到同一AP以减少MU干扰。我们提出了一种无细胞MMWAVE中的梁对准方法（BA）的干涉方法。在考虑的情况下，APS在UES执行模拟传输光束成形时执行完整的数字接收光束成形。我们使用商业射线跟踪器的现实MMWAVE通道评估我们的方法，显示了所提出的方法比全向传输的优越性以及不考虑MU干扰的方法。
Millimeter-wave (mmWave) cell-free massive multi-user (MU) multiple-input multiple-output (MIMO) systems combine the large bandwidths available at mmWave frequencies with the improved coverage of cell-free systems. However, to combat the high path loss at mmWave frequencies, user equipments (UEs) must form beams in meaningful directions, i.e., to a nearby access point (AP). At the same time, multiple UEs should avoid transmitting to the same AP to reduce MU interference. We propose an interference-aware method for beam alignment (BA) in the cell-free mmWave massive MU-MIMO uplink. In the considered scenario, the APs perform full digital receive beamforming while the UEs perform analog transmit beamforming. We evaluate our method using realistic mmWave channels from a commercial ray-tracer, showing the superiority of the proposed method over omnidirectional transmission as well as over methods that do not take MU interference into account.
