存在时钟异步的双基地ISAC系统中的感知：信号处理视角
Sensing in Bi-Static ISAC Systems with Clock Asynchronism: A Signal Processing Perspective
AI总结：
本文针对6G核心场景ISAC中双基地感知因收发端时钟异步导致感知性能下降甚至失效的问题，综述了现有解决技术，并提出未来研究方向与开放问题，助力双基地感知成熟发展。
摘要：
通信感知一体化（Integrated Sensing and Communication, ISAC）已被确定为即将到来的6G时代的核心应用场景。双基地感知作为ISAC中感知的主要类型，有望在近期推动ISAC的发展，因为它对现有网络基础设施的改动需求极小。然而，双基地感知面临的一项关键挑战是时钟异步问题，这是由于相距较远的发射机和接收机使用不同时钟导致的。该问题会使接收信号受到时变随机相位偏移的影响，严重降低直接感知的性能，甚至导致其失效。因此，为有效实现ISAC，大量研究致力于解决双基地感知中的时钟异步问题。本文概述了该问题以及在ISAC背景下已开发的相关技术。基于综述与比较，我们还得出了对未来研究方向和开放性问题的见解，旨在促进ISAC中双基地感知的成熟发展。
英文摘要：
Integrated Sensing and Communication (ISAC) has been identified as a pillar usage scenario for the impending 6G era. Bi-static sensing, a major type of sensing in ISAC, is promising to expedite ISAC in the near future, as it requires minimal changes to the existing network infrastructure. However, a critical challenge for bi-static sensing is clock asynchronism due to the use of different clocks at far-separated transmitters and receivers. This causes the received signal to be affected by time-varying random phase offsets, severely degrading, or even failing, direct sensing. Hence, to effectively enable ISAC, considerable research has been directed toward addressing the clock asynchronism issue in bi-static sensing. This paper provides an overview of the issue and existing techniques developed in an ISAC background. Based on the review and comparison, we also draw insights into the future research directions and open problems, aiming to nurture the maturation of bi-static sensing in ISAC.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
