In integrated sensing and communication (ISAC) systems, communication signals are supposed to provide high-resolution sensing services. Toward this goal, multiband sensing has recently emerged as a promising technology that jointly utilizes multiple noncontiguous communication bands to improve the sensing performance of ISAC systems. In this article, we first introduce the multiband signal model in the presence of phase-distortion factors, discussing the challenges and benefits of multiband sensing to reveal its intrinsic properties. Then, we investigate the resolution limit and discuss a specific sensing algorithm design of multiband sensing technology, which is designed to leverage multiband gains to achieve high-resolution sensing performance. Finally, a series of open research topics is discussed, which may bring new insights for future research on multiband sensing for ISAC.

中文翻译：

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基于 OFDM 的 ISAC 多频带传感：分辨率限制、算法设计和开放问题


在集成传感和通信（ISAC）系统中，通信信号应该提供高分辨率传感服务。为了实现这一目标，多频段传感最近已成为一种有前途的技术，它联合利用多个不连续的通信频段来提高 ISAC 系统的传感性能。在本文中，我们首先介绍存在相位失真因素的多频带信号模型，讨论多频带传感的挑战和好处，以揭示其内在特性。然后，我们研究了分辨率限制并讨论了多频带传感技术的具体传感算法设计，该算法旨在利用多频带增益来实现高分辨率传感性能。最后，讨论了一系列开放研究课题，这可能为 ISAC 多频段传感的未来研究带来新的见解。