A Survey on Fundamental Limits of Integrated Sensing and Communication

By An Liu, Zhe Huang, Min Li, Yubo Wan, Wenrui Li, Tony X. Han, Chenchen Liu, Rui Du, D. Tan, Jianmin Lu and 3 more. IEEE Communications Surveys and Tutorials, 2021

1,110 citations recorded by the source corpus.

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.

Subfields: Aerospace Engineering, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/876e1fa1e19363d18a5c2b1405e037e4d4e0b963

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Aerospace Engineering

1. Jie Xu
2. Rui Zhang
3. Qingqing Wu
4. Yonina C. Eldar
5. Fan Liu
6. Christos Masouros
7. Yong Zeng
8. Yuanhao Cui

In Electrical and Electronic Engineering

1. Rui Zhang
2. Emil Björnson
3. Qingqing Wu
4. Jie Xu
5. Merouane Debbah
6. Shuguang Cui
7. Yong Zeng
8. David Gesbert

Citations in the corpus

• UAV-Enabled Integrated Sensing and Communication: Opportunities and Challenges (2022, background): “, echo signal processing and clutter interference suppression) [7].”
• Integrated Sensing and Communications: Recent Advances and Ten Open Challenges (2023, methodology): “Liu et al. [29] have discussed the fundamental limits of ISAC commencing from both device-free and device-based sensing scenarios, followed by the joint-design-based ISAC and practical ISAC systems.”
• DeepSense 6G: A Large-Scale Real-World Multi-Modal Sensing and Communication Dataset (2022, background): “This synergy has recently been the driver for key research directions such as multi-modal sensing-aided communication [4]–[9], integrated sensing and communication [1], [3], [7], and communication-aided positioning [10].”
• Integrated Sensing and Communications: Toward Dual-Functional Wireless Networks for 6G and Beyond (2021, methodology): “Therefore, new analytical techniques are needed to evaluate ISAC systems [52].”
• A Tutorial on Environment-Aware Communications via Channel Knowledge Map for 6G (2023, background): “Another aspect of integration towards 6G is the integrated localization, sensing, and communication (ILSAC) [31]–[33], which integrates the three functionalities to best utilize the network infrastructure, hardware components, radio resources, and”
• On the Fundamental Tradeoff of Integrated Sensing and Communications Under Gaussian Channels (2022, background): “Background and Related Works IN AN ISAC system, wireless communications and sensing functionalities are performed by using a single hardware platform and a common radio waveform over the same frequency band, which considerably improves the energy-, spectral-, and hardware-efficiencies [1], [2], [3],”
• Enabling Joint Communication and Radar Sensing in Mobile Networks—A Survey (2020, background): “A very recent paper also provides a comprehensive review of the performance limits of JCAS systems [132].”