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A Survey on Fundamental Limits of Integrated Sensing and Communication
IEEE Communications Surveys & Tutorials ( IF 35.6 ) Pub Date : 2022-02-07 , DOI: 10.1109/comst.2022.3149272
An Liu 1 , Zhe Huang 1 , Min Li 1 , Yubo Wan 1 , Wenrui Li 1 , Tony Xiao Han 2 , Chenchen Liu 2 , Rui Du 2 , Danny Kai Pin Tan 2 , Jianmin Lu 2 , Yuan Shen 3 , Fabiola Colone 4 , Kevin Chetty 5
Affiliation  

The integrated sensing and communication (ISAC), in which the sensing and communication share the same frequency band and hardware, has emerged as a key technology in future wireless systems due to two main reasons. First, many important application scenarios in fifth generation (5G) and beyond, such as autonomous vehicles, Wi-Fi sensing and extended reality, requires both high-performance sensing and wireless communications. Second, with millimeter wave and massive multiple-input multiple-output (MIMO) technologies widely employed in 5G and beyond, the future communication signals tend to have high-resolution in both time and angular domain, opening up the possibility for ISAC. As such, ISAC has attracted tremendous research interest and attentions in both academia and industry. Early works on ISAC have been focused on the design, analysis and optimization of practical ISAC technologies for various ISAC systems. While this line of works are necessary, it is equally important to study the fundamental limits of ISAC in order to understand the gap between the current state-of-the-art technologies and the performance limits, and provide useful insights and guidance for the development of better ISAC technologies that can approach the performance limits. In this paper, we aim to provide a comprehensive survey for the current research progress on the fundamental limits of ISAC. Particularly, we first propose a systematic classification method for both traditional radio sensing (such as radar sensing and wireless localization) and ISAC so that they can be naturally incorporated into a unified framework. Then we summarize the major performance metrics and bounds used in sensing, communications and ISAC, respectively. After that, we present the current research progresses on fundamental limits of each class of the traditional sensing and ISAC systems. Finally, the open problems and future research directions are discussed.

中文翻译:

综合传感与通信的基本限制综述

由于两个主要原因,传感和通信共享相同频段和硬件的集成传感和通信(ISAC)已成为未来无线系统的关键技术。首先,第五代(5G)及以后的许多重要应用场景,如自动驾驶汽车、Wi-Fi 传感和扩展现实,都需要高性能传感和无线通信。其次,随着毫米波和大规模多输入多输出(MIMO)技术在5G及以后的广泛应用,未来的通信信号在时域和角域上都趋向于高分辨率,为ISAC开辟了可能性。因此,ISAC在学术界和工业界引起了极大的研究兴趣和关注。ISAC 的早期工作主要集中在设计上,分析和优化各种ISAC系统的实用ISAC技术。虽然这一系列工作是必要的,但同样重要的是研究 ISAC 的基本限制,以了解当前最先进技术与性能限制之间的差距,并为开发提供有用的见解和指导可以接近性能极限的更好的 ISAC 技术。在本文中,我们旨在对当前有关 ISAC 基本限制的研究进展进行全面调查。特别是,我们首先为传统的无线电传感(如雷达传感和无线定位)和 ISAC 提出了一种系统的分类方法,以便它们可以自然地合并到一个统一的框架中。然后我们总结了传感中使用的主要性能指标和界限,通信和ISAC,分别。之后,我们介绍了当前对传统传感和 ISAC 系统的每一类基本限制的研究进展。最后,讨论了开放的问题和未来的研究方向。
更新日期:2022-02-07
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