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With the rapid development of satellite communication and navigation, there is an urgent need to integrate both technologies to achieve reliable communication and precise navigation services within the same satellite system. By combining…

Signal Processing · Electrical Eng. & Systems 2026-05-27 Yaoyu Zhang , Xin Sun , Tianwei Hou , Anna Li , Sofie Pollin , Yuanwei Liu , Arumugam Nallanathan

This paper investigates satellite navigation and communication systems in both low-Earth-orbit (LEO) and medium-Earth-orbit (MEO) satellites, which systematically outlines the fundamental principles of satellite navigation systems (SNS),…

Systems and Control · Electrical Eng. & Systems 2026-05-26 Tianwei Hou , Da Guan , Yu Zhang , Anna Li , Arumugam Nallanathan

This paper investigates non-orthogonal multiple access (NOMA) assisted integrated sensing and communication (ISaC) networks. Compared to the conventional ISaC networks, where the total bandwidth is used for both the radar detection and…

Information Theory · Computer Science 2022-03-09 Chao Zhang , Wenqiang Yi , Yuanwei Liu

The new concept of semi-integrated-sensing-and-communication (Semi-ISaC) is proposed for next-generation cellular networks. Compared to the state-of-the-art, where the total bandwidth is used for integrated sensing and communication (ISaC),…

Information Theory · Computer Science 2023-02-01 Chao Zhang , Wenqiang Yi , Yuanwei Liu , Lajos Hanzo

This study investigates the application of a simultaneous transmitting and reflecting reconfigurable intelligent surface (STAR-RIS)-aided medium-Earth-orbit (MEO) satellite network for providing both global positioning services and…

Information Theory · Computer Science 2026-05-27 Tianwei Hou , Da Guan , Xin Sun , Anna Li , Wenqiang Yi , Yuanwei Liu , Arumugam Nallanathan

A novel integrated sensing and communication (ISAC) system is proposed, where a dual-functional base station is utilized to transmit the superimposed non-orthogonal multiple access (NOMA) communication signal for serving communication users…

Information Theory · Computer Science 2022-10-07 Jiakuo Zuo , Yuanwei Liu , Chenming Zhu , Yixuan Zou , Dengyin Zhang , Naofal Al-Dhahir

This paper proposes an energy-efficient RIS-enabled NOMA communication for LEO satellite networks. The proposed framework simultaneously optimizes the transmit power of ground terminals at LEO satellite and passive beamforming at RIS while…

Signal Processing · Electrical Eng. & Systems 2023-03-13 Wali Ullah Khan , Eva Lagunas , Asad Mahmood , Symeon Chatzinotas , Björn Ottersten

This paper investigates the optimization of reconfigurable intelligent surface (RIS) in an integrated sensing and communication (ISAC) system. \red{To meet the demand of growing number of devices, power domain non-orthogonal multiple access…

Signal Processing · Electrical Eng. & Systems 2023-09-13 Wanting Lyu , Yue Xiu , Xinyang Li , Songjie Yang , Phee Lep Yeoh , Yonghui Li , Zhongpei Zhang

Non-orthogonal multiple access (NOMA)-inspired integrated sensing and communication (ISAC) facilitates spectrum sharing for radar sensing and NOMA communications, whereas facing privacy and security challenges due to open wireless…

Information Theory · Computer Science 2024-07-02 Miaomiao Zhu , Pengxu Chen , Liang Yang , Alexandros-Apostolos A. Boulogeorgos , Theodoros A. Tsiftsis , Hongwu Liu

Integrated Sensing and Communications (ISAC) surpasses the conventional frequency-division sensing and communications (FDSAC) in terms of spectrum, energy, and hardware efficiency, with potential for greater enhancement through integration…

Information Theory · Computer Science 2024-07-16 Boqun Zhao , Chongjun Ouyang , Xingqi Zhang , Yuanwei Liu

This paper exploits the potential of reconfigurable intelligent surface (RIS) to improve radar sensing in a non-orthogonal multiple access (NOMA) empowered integrated sensing and communication (NOMA-ISAC) network. The objective is to…

Information Theory · Computer Science 2022-09-29 Jiakuo Zuo , Yuanwei Liu

Reconfigurable intelligent surfaces (RISs) constitute a promising performance enhancement for next-generation (NG) wireless networks in terms of enhancing both their spectrum efficiency (SE) and energy efficiency (EE). We conceive a system…

Signal Processing · Electrical Eng. & Systems 2023-04-06 Tianwei Hou , Yuanwei Liu , Zhengyu Song , Xin Sun , Yue Chen , Lajos HanzoE

This article focuses on the development of integrated sensing and communications (ISAC) from a multiple access (MA) perspective, where the idea of non-orthogonal multiple access (NOMA) is exploited for harmoniously accommodating the sensing…

Information Theory · Computer Science 2023-06-19 Xidong Mu , Zhaolin Wang , Yuanwei Liu

We consider a reconfigurable intelligent surface (RIS) assisted cell-free massive multiple-input multiple-output non-orthogonal multiple access (NOMA) system, where each access point (AP) serves all the users with the aid of the RIS. We…

Information Theory · Computer Science 2024-09-18 Malay Chakraborty , Ekant Sharma , Himal A. Suraweera , Hien Quoc Ngo

A non-orthogonal multiple access (NOMA)-inspired integrated sensing and communication (ISAC) framework is proposed, where a dual-functional base station (BS) transmits the composite communication and sensing signals. In contrast to treating…

Information Theory · Computer Science 2022-08-02 Zhaolin Wang , Xidong Mu , Yuanwei Liu , Zhiguo Ding

This paper proposes an energy-efficient RIS-assisted downlink NOMA communication for LEO satellite networks. The proposed framework simultaneously optimizes the transmit power of ground terminals of the LEO satellite and the passive…

Signal Processing · Electrical Eng. & Systems 2023-06-21 Wali Ullah Khan , Eva Lagunas , Asad Mahmood , Symeon Chatzinotas , Björn Ottersten

A non-orthogonal multiple access (NOMA) inspired integrated sensing and communication (ISAC) system is investigated. A dual-functional base station (BS) serves multiple communication users while sensing multiple targets, by transmitting the…

Information Theory · Computer Science 2021-12-20 Zhaolin Wang , Yuanwei Liu , Xidong Mu , Zhiguo Ding

A non-orthogonal multiple access (NOMA) empowered integrated sensing and communication (ISAC) framework is investigated. A dual-functional base station serves multiple communication users employing NOMA, while the superimposed NOMA…

Information Theory · Computer Science 2022-01-06 Zhaolin Wang , Yuanwei Liu , Xidong Mu , Zhiguo Ding , Octavia A. Dobre

Next generation beyond 5G networks are expected to provide both Terabits per second data rate communication services and centimeter-level accuracy localization services in an efficient, seamless and cost-effective manner. However, most of…

Signal Processing · Electrical Eng. & Systems 2021-05-20 Yu Wang , Hejia Luo , Ying Chen , Jun Wang , Rong Li , Bin Wang

Power-domain non-orthogonal multiple access (NOMA) has become a promising technology to exploit the new dimension of the power domain to enhance the spectral efficiency of wireless networks. However, most existing NOMA schemes rely on the…

Signal Processing · Electrical Eng. & Systems 2020-03-24 Min Fu , Yong Zhou , Yuanming Shi , Khaled B. Letaief
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