Integrated sensing and communication (ISAC) is expected to play a crucial role in the sixth-generation (6G) mobile communication systems, offering potential applications in the scenarios of intelligent transportation, smart factories, etc. The performance of radar sensing in ISAC systems is closely related to the characteristics of radar sensing and communication channels. Therefore, ISAC channel modeling serves as a fundamental cornerstone for evaluating and optimizing ISAC systems. This article provides a comprehensive survey on the ISAC channel modeling methods. Furthermore, the methods of target radar cross section (RCS) modeling and clutter RCS modeling are summarized. Finally, we discuss the future research trends related to ISAC channel modeling in various scenarios.

翻译：集成感知与通信（ISAC）预计将在第六代（6G）移动通信系统中发挥关键作用，在智能交通、智能工厂等场景中具有潜在应用价值。ISAC系统中雷达感知的性能与雷达感知及通信信道的特性密切相关。因此，ISAC信道建模是评估和优化ISAC系统的基础基石。本文对ISAC信道建模方法进行了全面综述。此外，还总结了目标雷达散射截面（RCS）建模和杂波RCS建模的方法。最后，我们讨论了各场景下与ISAC信道建模相关的未来研究趋势。