论文标题
COVRAGE：移动交互式虚拟现实的毫米波束成绩
CoVRage: Millimeter-Wave Beamforming for Mobile Interactive Virtual Reality
论文作者
论文摘要
当代虚拟现实（VR）设置通常包括一个外部源，将内容传递到头部安装的显示（HMD）。在此类设置中“切割电线”并真正无线的“切线”将需要一个无线网络，能够以极低的延迟提供大量的视频数据。较高频率的大量带宽，例如毫米波（MMWave），可以满足这些要求。由于MMWave频率的衰减和路径损失很高，因此波束形成至关重要。在无线VR中，将天线整合到HMD中，任何头部旋转也会改变天线的方向。因此，波束形成必须实时适应用户的头部旋转。 HMD的内置传感器提供准确的方向估计值可能有助于如此快速的波束形成。在这项工作中，我们提出了Covrage，这是一种针对VR HMD的接收方侧面孔形成溶液。使用现代HMD上的内置取向预测，该算法估计了HMD的到达角度（AOA）在不久的将来将如何变化，并涵盖了使用子阵列合成的动态形状的长方形梁的AOA轨迹。我们表明，即使鉴于时间或空间不准确的取向数据，该解决方案也可以始终如一地覆盖这些轨迹。
Contemporary Virtual Reality (VR) setups often include an external source delivering content to a Head-Mounted Display (HMD). "Cutting the wire" in such setups and going truly wireless will require a wireless network capable of delivering enormous amounts of video data at an extremely low latency. The massive bandwidth of higher frequencies, such as the millimeter-wave (mmWave) band, can meet these requirements. Due to high attenuation and path loss in the mmWave frequencies, beamforming is essential. In wireless VR, where the antenna is integrated into the HMD, any head rotation also changes the antenna's orientation. As such, beamforming must adapt, in real-time, to the user's head rotations. An HMD's built-in sensors providing accurate orientation estimates may facilitate such rapid beamforming. In this work, we present coVRage, a receive-side beamforming solution tailored for VR HMDs. Using built-in orientation prediction present on modern HMDs, the algorithm estimates how the Angle of Arrival (AoA) at the HMD will change in the near future, and covers this AoA trajectory with a dynamically shaped oblong beam, synthesized using sub-arrays. We show that this solution can cover these trajectories with consistently high gain, even in light of temporally or spatially inaccurate orientational data.
