Wideband channel tracking for mmWave MIMO system with hybrid beamforming architecture: (Invited Paper)
Wideband channel tracking for mmWave MIMO system with hybrid beamforming architecture: (Invited Paper)
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DOI：
10.1109/camsap.2017.8313185
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发表时间：
2017-12
期刊：
影响因子：
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通讯作者：
Han Yan;S. Chaudhari;D. Cabric
中科院分区：
文献类型：
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作者：
Han Yan;S. Chaudhari;D. Cabric
毫米波（mmWave）系统需要在基站（BS）和用户设备（UE）处的大量天线以用于期望的链路预算。由于UE移动性下的时变信道，最新的信道状态信息（CSI）对于获得波束成形增益是重要的。频繁的信道估计开销成为实现高吞吐量的瓶颈。在本文中，我们提出了第一个毫米波频率选择性信道跟踪技术的混合模拟和数字波束形成架构。在跟踪期间，该技术利用毫米波信道稀疏性，并且仅使用一个训练符号来更新CSI。我们的仿真研究利用了动态信道模拟器，建立在最近提出的几何随机方法从mmMAGIC项目在28 GHz。假设UE的移动速度为10 m/s，旋转速度为200 deg/s，在100 ms的时间窗口内，与静态环境相比，所提出的算法保持了80%的频谱效率。与现有的信道估计技术相比，所提出的跟踪算法减少了3倍的开销。
Millimeter-wave (mmWave) systems require a large number of antennas at both base station (BS) and user equipment (UE) for a desirable link budget. Due to time varying channel under UE mobility, up-to-date channel state information (CSI) is important to obtain the beamforming gain. The overhead cost of frequent channel estimation becomes a bottleneck to achieve high throughput. In this paper, we propose the first mmWave frequency selective channel tracking technique for hybrid analog and digital beamforming architecture. During tracking, this technique exploits mmWave channel sparsity and uses only one training symbol to update the CSI. Our simulation study utilizes a dynamic channel simulator that builds on top of recently proposed geometric stochastic approach from mmMAGIC project at 28 GHz. Assuming 10m/s moving speed and 200 deg/s rotation speed at UE, the proposed algorithm maintains the 80% of the spectral efficiency as compared to static environment over a time window of 100 ms. The proposed tracking algorithm reduces the overhead by 3 times as compared to existing channel estimation technique.