This paper delves into the potential of intelligent reflecting surfaces (IRSs) in enabling integrated sensing and communication (ISAC) in multi-user multi-path scenarios. We introduce a three-dimensional (3D) multi-user ISAC framework with distributed IRSs, which offers simultaneous signal demodulation, channel estimation, and localization. The transmission is divided into a user access stage and a downlink transmission stage. In the first stage, we propose an algorithm for simultaneous uplink signal demodulation and angles of arrival (AoA) estimation at the semi-passive IRS. Moreover, a joint active and passive beamforming scheme inspired by radar-communication, is proposed to enhance both communication and localization performance in the downlink stage, while eliminating the need for distinct localization reference signals. Numerical results demonstrate that the proposed ISAC framework achieves centimeter-level localization accuracy while maintaining comparable communication performance to communication-only systems, thus validating its effectiveness.

Xingyu Peng

Xiaoling Hu

Jiabao Gao

Richeng Jin

Xiaoming Chen

Caijun Zhong

IEEE Transactions on Communications

IEEE TRANSACTIONS ON COMMUNICATIONS 通过包括无线电在内的电磁传播发表高质量的手稿，介绍所有电信技术（包括电话、电报、传真和电视）的最新进展；金属丝;天线;地下、同轴和海底电缆；波导、通信卫星和激光器；在海洋、航空、空间和固定站服务方面；中继器、无线电中继、信号存储和再生；电信错误检测和纠正；多路复用和载波技术；通信交换系统；数据通信；和传播理论。

The IEEE Transactions on Communications publishes high-quality manuscripts that cover the latest advancements in electromagnetic propagation, including telecommunications technologies such as radio, telephone, telegraph, fax, and television. The content encompasses technologies like metallic wires, antennas, underground, coaxial, and submarine cables, waveguides, communication satellites, and lasers, as well as their applications in marine, aviation, space, and fixed station services. Additionally, the journal explores topics such as repeaters, radio relays, signal storage and regeneration, telecommunications error detection and correction, multiplexing and carrier technologies, communication switching systems, data communication, and propagation theory.

《IEEE Transactions on Communications》期刊发表高质量的手稿，涵盖电磁传播领域的最新进展，包括无线电、电话、电报、传真和电视等电信技术。内容涉及金属丝、天线、地下、同轴和海底电缆、波导、通信卫星和激光器等技术，以及在海洋、航空、空间和固定站服务中的应用。此外，期刊还探讨中继器、无线电中继、信号存储和再生、电信错误检测与纠正、多路复用和载波技术、通信交换系统、数据通信和传播理论等主题。

Category	Quartile
计算机科学	2
计算机科学, 工程电子与电气	2
计算机科学, 电信学	2

Integrated Localization and Communication for IRS-Assisted Multi-User mmWave MIMO Systems

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