论文标题
毫米波雷达波束与空间路径索引调制通信
Millimeter-Wave Radar Beamforming with Spatial Path Index Modulation Communications
论文作者
论文摘要
为了有效利用无线频谱并节省硬件成本，第五代及以后（B5G）无线网络设想集成感应和通信（ISAC）范式共同访问频谱。在B5G系统中，通常通过使用较少的射频链但以多重增益为代价来避免使用的昂贵硬件。最近，已经提出了通过空间路径指数调制（SPIM）来克服这种毫米波（MMWave）混合光束器的缺点，这调节了基站和用户之间的空间路径并提高光谱效率。在本文中，我们提出了一种用于混合光束形成的SPIM-ISAC方法，以同时向雷达目标和通信用户产生光束。我们引入了一种低复杂性方法，用于设计混合光束器，其中包括仅雷达和仅通信的光束形成器。数值实验表明，我们的SPIM-ISAC方法在光谱效率和生成的亮片板方面对传统的MMWave-ISAC设计表现出显着的性能改善。
To efficiently utilize the wireless spectrum and save hardware costs, the fifth generation and beyond (B5G) wireless networks envisage integrated sensing and communications (ISAC) paradigms to jointly access the spectrum. In B5G systems, the expensive hardware is usually avoided by employing hybrid beamformers that employ fewer radio-frequency chains but at the cost of the multiplexing gain. Recently, it has been proposed to overcome this shortcoming of millimeter wave (mmWave) hybrid beamformers through spatial path index modulation (SPIM), which modulates the spatial paths between the base station and users and improves spectral efficiency. In this paper, we propose an SPIM-ISAC approach for hybrid beamforming to simultaneously generate beams toward both radar targets and communications users. We introduce a low complexity approach for the design of hybrid beamformers, which include radar-only and communications-only beamformers. Numerical experiments demonstrate that our SPIM-ISAC approach exhibits a significant performance improvement over the conventional mmWave-ISAC design in terms of spectral efficiency and the generated beampattern.
