This article discusses the employment of simultaneously transmitting and reflecting surface (STARS) for integrated sensing and communication (ISAC) networks. First, two fundamental configurations of STARS-enabled ISAC systems are introduced, namely integrated full-space configuration and separated half-space configuration, as well as their respective advantages and common challenges are identified. To address the aforementioned challenges, a novel sensing-at-STARS design is proposed, where the sensing functionality is achieved at the STARS instead of at the base station. Such a design significantly improves the echo signal energy by eliminating undesired echo energy attenuation/leakage, in addition to establishing favorable echo propagation paths to facilitate sensing information extraction. We also present three practical implementations for sensing-at-STARS, including separated elements, mode-selection elements, and power-splitting elements. Each implementation enables flexible sensing-communication tradeoffs. Numerical results are provided to demonstrate the superiority of the proposed STARS-enabled ISAC design. Finally, we discuss several future research directions.

翻译：本文探讨了在集成感知与通信（ISAC）网络中应用同时透射与反射表面（STARS）的问题。首先，介绍了两种基本的STARS赋能ISAC系统架构，即集成全空间架构与分离半空间架构，并明确了它们各自的优势及共同面临的挑战。为应对上述挑战，提出了一种创新的“感知-于-STARS”设计，将感知功能集成于STARS而非基站。该设计通过消除不必要的回波能量衰减/泄漏，显著提升了回波信号能量，并构建了有利于感知信息提取的回波传播路径。我们还提出了三种面向“感知-于-STARS”的实用实现方案，包括分离元件、模式选择元件和功率分配元件，每种方案均能实现灵活的感知与通信权衡。数值结果验证了所提STARS赋能ISAC设计的优越性。最后，本文讨论了几个未来研究方向。