Holographic massive multiple-input multiple-output (MIMO), in which a spatially continuous surface is being used for signal transmission and reception, have emerged as a promising solution for improving the coverage and data rate of wireless communication systems. To realize these objectives, the acquisition of accurate channel state information in holographic massive MIMO systems is crucial. In this paper, we propose a channel estimation scheme based on a parametric physical channel model for line-of-sight (LoS) dominated communication in millimeter and terahertz wave bands. The proposed channel estimation scheme exploits the specific structure of the radiated beams generated by the continuous surface to estimate the channel parameters in a dominated LoS channel model. The training overhead and computational complexity of the proposed scheme do not scale with the number of antennas. The simulation results demonstrate that the proposed estimation scheme significantly outperforms other benchmark schemes in poor scattering environment.
翻译:为了实现这些目标,在全息大型多投入多输出系统中获取准确的频道状态信息至关重要。在本文件中,我们提出了一个基于以光线和千兆赫波波带为主的视线(LOS)参数物理信道模型的频道估计办法。拟议的频道估计办法利用了连续地表产生的辐射波束的具体结构来估计占主导地位的LOS频道模型中的频道参数。拟议办法的间接费用和计算复杂性与天线数量不相称。模拟结果表明,拟议的估计办法大大优于分散环境差的其他基准办法。