标题： 超大容量全双工MIMO用于太赫兹以下频率的同步下行通信和单基地感知 显示英文标题

标题： Extremely Large Full Duplex MIMO for Simultaneous Downlink Communications and Monostatic Sensing at Sub-THz Frequencies

摘要： 带内全双工（FD）技术最近受到关注，作为集成感知与通信（ISAC）新兴范式的推动者，该范式旨在将未连接实体的感知机制无缝集成到下一代无线网络中。在本文中，我们提出了一种具有极高天线阵列的FD多输入多输出（MIMO）系统，该系统在其收发模块中进行了优化，考虑了两种新兴的模拟波束成形架构，以同时进行下行链路（DL）通信和单基地类型的感知，后者操作依赖于传输的信息承载信号的接收反射。设计了一个新的优化框架，用于联合设计模拟和数字发射波束成形、模拟接收合并以及自干扰信号的数字取消器，其目标是最大化可实现的DL速率，同时满足未知三维参数的定位误差界限的预定义阈值。利用具有完全连接相移器网络和部分连接超材料阵列的波束成形架构的独特特性，提出了两种ISAC设计方案。我们的仿真结果展示了两种所提设计相对于现有最佳方案的优势，突显了各种系统参数在通信和感知功能之间的权衡作用。 显示英文摘要

摘要： The in-band Full Duplex (FD) technology is lately gaining attention as an enabler for the emerging paradigm of Integrated Sensing and Communications (ISAC), which envisions seamless integration of sensing mechanisms for unconnected entities into next generation wireless networks. In this paper, we present an FD Multiple-Input Multiple-Output (MIMO) system with extremely large antenna arrays at its transceiver module, which is optimized, considering two emerging analog beamforming architectures, for simultaneous DownLink (DL) communications and monostatic-type sensing intended at the sub-THz frequencies, with the latter operation relying on received reflections of the transmitted information-bearing signals. A novel optimization framework for the joint design of the analog and digital transmit beamforming, analog receive combining, and the digital canceler for the self-interference signal is devised with the objective to maximize the achievable DL rate, while meeting a predefined threshold for the position error bound for the unknown three-dimensional parameters of a passive target. Capitalizing on the distinctive features of the beamforming architectures with fully-connected networks of phase shifters and partially-connected arrays of metamaterials, two ISAC designs are presented. Our simulation results showcase the superiority of both proposed designs over state-of-the-art schemes, highlighting the role of various system parameters in the trade-off between the communication and sensing functionalities.