期刊
IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS
卷 40, 期 6, 页码 1728-1767出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSAC.2022.3156632
关键词
Radar; Sensors; Radar antennas; Wireless communication; Radio frequency; Phased arrays; MIMO radar; Integrated sensing and communications; 6G; performance tradeoff; waveform design; perceptive network
资金
- National Natural Science Foundation of China [U2001208, 62101234]
- Engineering and Physical Sciences Research Council [EP/S028455/1]
- Science and Technology Program of Guangdong Province [2021A0505030002]
- Ministero dell'Istruzione, dell'Universita e della Ricerca (MIUR) Program Dipartimenti di Eccellenza 2018-2022
This article provides a comprehensive review on the background, key applications, and state-of-the-art approaches of Integrated Sensing and Communications (ISAC). It discusses the interplay between sensing and communications (S&C), performance tradeoffs, and signal processing aspects of ISAC. The article also presents a vision on the deeper integration of S&C within the framework of perceptive networks and the potential integration of ISAC with other emerging communication technologies, highlighting their positive impacts on the future of wireless networks.
As the standardization of 5G solidifies, researchers are speculating what 6G will be. The integration of sensing functionality is emerging as a key feature of the 6G Radio Access Network (RAN), allowing for the exploitation of dense cell infrastructures to construct a perceptive network. In this IEEE Journal on Selected Areas in Communications (JSAC) Special Issue overview, we provide a comprehensive review on the background, range of key applications and state-of-the-art approaches of Integrated Sensing and Communications (ISAC). We commence by discussing the interplay between sensing and communications (S&C) from a historical point of view, and then consider the multiple facets of ISAC and the resulting performance gains. By introducing both ongoing and potential use cases, we shed light on the industrial progress and standardization activities related to ISAC. We analyze a number of performance tradeoffs between S&C, spanning from information theoretical limits to physical layer performance tradeoffs, and the cross-layer design tradeoffs. Next, we discuss the signal processing aspects of ISAC, namely ISAC waveform design and receive signal processing. As a step further, we provide our vision on the deeper integration between S&C within the framework of perceptive networks, where the two functionalities are expected to mutually assist each other, i.e., via communication-assisted sensing and sensing-assisted communications. Finally, we identify the potential integration of ISAC with other emerging communication technologies, and their positive impacts on the future of wireless networks.
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