User Tracking and Direction Estimation Codebook Design for IRS-Assisted mmWave Communication
arxiv(2024)
摘要
Future communication systems are envisioned to employ intelligent reflecting
surfaces (IRSs) and the millimeter wave (mmWave) frequency band to provide
reliable high-rate services. For mobile users, the time-varying channel state
information (CSI) requires adequate adjustment of the reflection pattern of the
IRS. We propose a novel codebook-based user tracking (UT) algorithm for
IRS-assisted mmWave communication, allowing suitable reconfiguration of the IRS
unit cell phase shifts, resulting in a high reflection gain. The presented
algorithm acquires the direction information of the user based on a peak
likelihood-based direction estimation. Using the direction information, the
user's trajectory is extrapolated to proactively update the adopted codeword
and adjust the IRS phase shift configuration accordingly. Furthermore, we
conduct a theoretical analysis of the direction estimation error and utilize
the obtained insights to design a codebook specifically optimized for direction
estimation. Our numerical results reveal a lower direction estimation error of
the proposed UT algorithm when employing our designed codebook compared to
codebooks from the literature. Furthermore, the average achieved
signal-to-noise ratio (SNR) as well as the average effective rate of the
proposed UT algorithm are analyzed. The proposed UT algorithm requires only a
low overhead for direction and channel estimation and avoids outdated IRS phase
shifts. Furthermore, it is shown to outperform two benchmark schemes based on
direct phase shift optimization and hierarchical codebook search, respectively,
via computer simulations.
更多查看译文
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要