标题： 集成感知与通信：基于互信息的框架 显示英文标题

标题： Integrated Sensing and Communications: A Mutual Information-Based Framework

摘要： 集成感知与通信（ISAC）有潜力克服现有频分感知与通信（FDSAC）技术的局限性。因此，它最近引起了广泛关注。本文旨在从互信息（MI）的角度提出一个统一的分析框架来描述ISAC。基于所提出的框架，感知性能和通信性能分别通过感知互信息和通信互信息进行评估。该框架的统一性源于感知与通信（S&C）性能指标，即S&C互信息具有相似的物理和数学特性以及相同的测量单位这一事实。基于此框架，研究并比较了下行链路和上行链路ISAC系统的S&C性能与FDSAC系统的性能。对于每个考虑的系统设置，提供了数值结果以证明ISAC相对于传统FDSAC设计的优势。最后，在基于互信息的ISAC背景下提供了有前景的开放研究方向。 显示英文摘要

摘要： Integrated sensing and communications (ISAC) is potentially capable of circumventing the limitations of existing frequency-division sensing and communications (FDSAC) techniques. Hence, it has recently attracted significant attention. This article aims to propose a unified analytical framework for ISAC from a mutual information (MI) perspective. Based on the proposed framework, the sensing performance and the communication performance are evaluated by the sensing MI and the communication MI, respectively. The unity of this framework is originated from the fact that the sensing and communication (S\&C) performance metrics, i.e., the S\&C MI, have the similar physical and mathematical properties as well as the same unit of measurement. Based on this framework, the S\&C performance of downlink and uplink ISAC systems is investigated and compared with that of FDSAC systems. Along each considered system settings, numerical results are provided to demonstrate the superiority of ISAC over conventional FDSAC designs. Finally, promising open research directions are provided in the context of MI-based ISAC.