论文标题
IRS辅助MMWave通信网络中基于密码的用户跟踪
Codebook-Based User Tracking in IRS-Assisted mmWave Communication Networks
论文作者
论文摘要
在本文中，我们提出了一种新型的移动用户跟踪（UT）方案，用于基于代码书的智能反射表面（IRS）辅助毫米波（MMWave）系统。提出的UT方案利用了从IRS到移动用户的方向的时间相关性，以选择IRS的相移，从而为用户提供反思。为此，根据普遍的似然比测试（GLRT）定期估算用户的方向，并且用户的移动轨迹从过去的几个方向估计中推断出来。根据平均有效速率评估所提出的UT方案的效率，该效率既说明了所需的信号开销和所达到的信号噪声比（SNR）。我们的结果表明，对于中等至高SNR，提出的基于代码书的UT方案比基于完整的代码书搜索和单个IRS单位单元单元的两种参考方法的有效率更高。
In this paper, we present a novel mobile user tracking (UT) scheme for codebook-based intelligent reflecting surface (IRS) aided millimeter wave (mmWave) systems. The proposed UT scheme exploits the temporal correlation of the direction from the IRS to the mobile user for selecting IRS phase shifts that provide reflection towards the user. To this end, the user's direction is periodically estimated based on a generalized likelihood ratio test (GLRT) and the user's movement trajectory is extrapolated from several past direction estimates. The efficiency of the proposed UT scheme is evaluated in terms of the average effective rate, which accounts for both the required signaling overhead and the achieved signal to noise ratio (SNR). Our results show that for medium to high SNR, the proposed codebook based UT scheme achieves a higher effective rate than two reference approaches based on full codebook search and optimization of the individual IRS unit cells, respectively.
