论文标题
在300 GHz的室内走廊中使用改良的鼠尾草算法进行的通道测量和表征
Channel Measurement and Characterization with Modified SAGE Algorithm in an Indoor Corridor at 300 GHz
论文作者
论文摘要
Terahertz（THZ）带中的频率要高得多，可以防止用于微波或毫米波频带的有效利用通道模型。在本文中，在室内走廊的情况下，使用频率域矢量网络分析仪（VNA）的声音在306-321 GHz的室内方案中进行了测量活动。为了实现THZ频段中方向扫描测量运动的高分辨率多径成分（MPC）提取，进一步提出了一种新型的修改后的广泛性预期最大化（SAGE）算法。此外，在LOS案例中计算和分析了关键的通道特征，包括路径损失，阴影褪色，K因子，延迟扩散，角度扩散，群集参数和跨相关性。此外，在NLOS案件中进行了两次对比的测量运动，在墙壁上有和没有其他反射性箔，以充当有效的散射器。比较结果表明，反射箔可通过将近6 dB来改善NLOS情况的通道条件有用，这可能被用作智能反射表面（IRS）的替代方案，以增强THZ通信的覆盖能力。
The much higher frequencies in the Terahertz (THz) band prevent the effective utilization of channel models dedicated for microwave or millimeter-wave frequency bands. In this paper, a measurement campaign is conducted in an indoor corridor scenario at 306-321 GHz with a frequency-domain Vector Network Analyzer (VNA)-based sounder. To realize high-resolution multipath component (MPC) extraction for the direction-scan measurement campaigns in the THz band, a novel modified space-alternating generalized expectation-maximization (SAGE) algorithm is further proposed. Moreover, critical channel characteristics, including the path loss, shadow fading, K-factor, delay spread, angular spreads, cluster parameters, and cross correlations are calculated and analyzed in the LoS case. Besides, two contrasted measurement campaigns in the NLoS case are conducted, with and without additional reflective foils on walls to serve as effective scatterers. Comparison results indicate that the reflective foils are useful to improve the channel conditions in the NLoS case by nearly 6 dB, which is potential to be utilized as alternative of intelligent reflecting surfaces (IRS) to enhance the coverage ability of THz communications.
