Selected Papers by Topics:

• Stacked Intelligent Metasurfaces (SIM)
• Flexible Intelligent Metasurfaces (FIM)
• Near-Field Communications (NFC)
• Reconfigurable Intelligent Surface (RIS)
• Holographic MIMO (HMIMO)
• Integrated Sensing and Communications (ISAC)
  
  
  

Stacked Intelligent Metasurfaces (SIM)

* Overview

• J. An, C. Yuen, C. Xu, H. Li, D. W. K. Ng, M. Di Renzo, M. Debbah and L. Hanzo, “Stacked intelligent metasurface-aided MIMO transceiver design,” IEEE Wireless Commun., vol. 31, no. 4, pp. 123-131, Aug. 2024. (WoS Highly Cited Paper)
  [arXiv]
  

* Wave-Domain MIMO Precoding and Combining

• J. An, C. Xu, D. W. K. Ng, G. C. Alexandropoulos, C. Huang, C. Yuen and L. Hanzo, “Stacked intelligent metasurfaces for efficient holographic MIMO communications in 6G,” IEEE J. Sel. Areas Commun., vol. 41, no. 8, pp. 2380-2396, Aug. 2023. (WoS Highly Cited Paper)
  [arXiv]
• J. An, M. D. Renzo, M. Debbah, H. V. Poor and C. Yuen, “Stacked intelligent metasurfaces for multiuser downlink beamforming in the wave domain,” IEEE Trans. Wireless Commun., 2025, Early Access.
  [arXiv]
• J. An, M. Di Renzo, M. Debbah and C. Yuen, “Stacked intelligent metasurfaces for multiuser beamforming in the wave domain,” Proc. IEEE Int. Conf. Commun. (ICC), Rome, Italy, 2023, pp. 2834-2839. (IEEE ICC Best Paper Award)
  [arXiv]
  

* Channel Estimation

• X. Yao, J. An, L. Gan, M. Di Renzo and C. Yuen, “Channel estimation for stacked intelligent metasurface-assisted wireless networks,” IEEE Wireless Commun. Lett., vol. 13, no. 5, pp. 1349-1353, May 2024.
  [arXiv]   [code]   [slides]   [post-EN]   [post-CN]   [video-EN]   [video-CN]
  

* Wideband Systems

• Q. Li, M. El-Hajjar, C. Xu, J. An, C. Yuen and L. Hanzo, “Stacked intelligent metasurface-based transceiver design for near-field wideband systems,” IEEE Trans. Commun., 2025, Early Access.
  [arXiv]
  

* Cell-Free Massive MIMO

• E. Shi, J. Zhang, J. An, G. Zhang, Z. Liu, C. Yuen and B. Ai, “Joint AP-UE association and precoding for SIM-aided cell-free massive MIMO systems,” IEEE Trans. Wireless Commun., 2025, Early Access.
  [arXiv]
• E. Shi, J. Zhang, Y. Zhu, J. An, C. Yuen and B. Ai, “Uplink performance of stacked intelligent metasurface-enhanced cell-free massive MIMO systems,” IEEE Trans. Wireless Commun., vol. 24, no. 5, pp. 3731-3746, May 2025.
  [arXiv]
• Q. Li, M. El-Hajjar, C. Xu, J. An, C. Yuen and L. Hanzo, “Stacked intelligent metasurfaces for holographic MIMO-aided cell-free networks,” IEEE Trans. Commun., vol. 72, no. 11, pp. 7139-7151, Nov. 2024.
  [arXiv]
  

* Wireless Sensing

• J. An, C. Yuen, Y. L. Guan, M. Di Renzo, M. Debbah, H. V. Poor and L. Hanzo, “Two-dimensional direction-of-arrival estimation using stacked intelligent metasurfaces,” IEEE J. Sel. Areas Commun., vol. 42, no. 10, pp. 2786-2802, Oct. 2024.
  [arXiv]
• H. Niu, J. An, A. Papazafeiropoulos, L. Gan, S. Chatzinotas and M. Debbah, “Stacked intelligent metasurfaces for integrated sensing and communications,” IEEE Wireless Commun. Lett., vol. 13, no. 10, pp. 2807-2811, Oct. 2024.
  [arXiv]   [code]   [slides]   [post-EN]   [post-CN]   [video-EN]   [video-CN]
  

* Artificial Intelligence (AI)

• H. Liu, J. An, G. C. Alexandropoulos, D. W. K. Ng, C. Yuen and L. Gan, “Multi-user MISO with stacked intelligent metasurfaces: A DRL-based sum-rate optimization approach,” IEEE Trans. Cogn. Commun. Netw., 2025, Early Access.
  [arXiv]
• G. Huang, J. An, Z. Yang, L. Gan, M. Bennis and M. Debbah, “Stacked intelligent metasurfaces for task-oriented semantic communications,” IEEE Wireless Commun. Lett., vol. 14, no. 2, pp. 310-314, Feb. 2025.
  [arXiv]   [code]   [slides]   [post-EN]   [post-CN]   [video-EN]   [video-CN]
  
  
  

Flexible Intelligent Metasurfaces (FIM)

• J. An, C. Yuen, M. D. Renzo, M. Debbah, H. V. Poor and L. Hanzo, “Flexible intelligent metasurfaces for downlink multiuser MISO communications,” IEEE Trans. Wireless Commun., vol. 24, no. 4, pp. 2940-2955, Apr. 2025.
  [arXiv]
• J. An, Z. Han, D. Niyato, M. Debbah, C. Yuen and L. Hanzo, “Flexible intelligent metasurfaces for enhancing MIMO communications,” IEEE Trans. Commun., 2025, Early Access.
  [arXiv]
  
  
  

Near-Field Communications (NFC)

• J. An, C. Yuen, L. Dai, M. Di Renzo, M. Debbah and L. Hanzo, “Near-field communications: Research advances, potential, and challenges,” IEEE Wireless Commun., vol. 31, no. 3, pp. 100-107, Jun. 2024.
  [arXiv]
• Z. Teng, J. An, C. Masouros, H. Li, L. Gan and D. W. K. Ng, “Dynamic precoding for near-field secure communications: Implementation and performance analysis,” IEEE Internet Things J., 2025, Early Access.
  [arXiv]
  
  
  

Reconfigurable Intelligent Surface (RIS)

* Codebook

• J. An, C. Xu, Q. Wu, D. W. K. Ng, M. Di Renzo, C. Yuen and L. Hanzo, “Codebook-based solutions for reconfigurable intelligent surfaces and their open challenges,” IEEE Wireless Commun., vol. 31, no. 2, pp. 134-141, Apr. 2024. (WoS Highly Cited Paper)
  [arXiv]
• J. An, C. Xu, L. Gan and L. Hanzo, “Low-complexity channel estimation and passive beamforming for RIS-assisted MIMO systems relying on discrete phase shifts,” IEEE Trans. Commun., vol. 70, no. 2, pp. 1245-1260, Feb. 2022. (WoS Highly Cited Paper)
  [arXiv]
• Z. Yu, J. An, E. Basar, L. Gan and C. Yuen, “Environment-aware codebook design for RIS-assisted MU-MISO communications: Implementation and performance analysis,” IEEE Trans. Commun., vol. 72, no. 12, pp. 7466-7479, Dec. 2024.
  [arXiv]   [code]   [slides]   [post-EN]   [post-CN]   [video-EN]   [video-CN]
• Z. Yu, J. An, L. Gan, H. Li and S. Chatzinotas, “Weighted codebook scheme for RIS-assisted point-to-point MIMO communications,” IEEE Wireless Commun. Lett., vol. 14, no. 5, pp. 1571-1575, May 2025.
  [arXiv]
  

* Adjustable-Delay RIS

• J. An, C. Xu, D. W. K. Ng, C. Yuen and L. Hanzo, “Adjustable-delay RIS is capable of improving OFDM systems,” IEEE Trans. Veh. Technol., vol. 73, no. 7, pp. 9927-9942, Jul. 2024.
  [arXiv]
  

* Channel Modeling and Estimation

• G. Sun, R. He, J. An, B. Ai, Y. Song, Y. Niu, G. Wang and C. Yuen, “Geometric-based channel modeling and analysis for double-RIS-aided vehicle-to-vehicle communication systems,” IEEE Internet Things J., vol. 11, no. 10, pp. 18888-18901, May 2024.
  [arXiv]
• C. Xu, J. An, T. Bai, S. Sugiura, R. G. Maunder, Z. Wang, L.-L. Yang and L. Hanzo, “Channel estimation for reconfigurable intelligent surface assisted high-mobility wireless systems,” IEEE Trans. Veh. Technol., vol. 72, no. 1, pp. 718-734, Jan. 2023.
  [arXiv]
  

* Cell-Free Massive MIMO

• W. Xu, J. An, H. Li, L. Gan and C. Yuen, “Algorithm-unrolling-based distributed optimization for RIS-assisted cell-free networks,” IEEE Internet Things J., vol. 11, no. 1, pp. 944-957, Jan. 2024. (WoS Highly Cited Paper)
  [arXiv]
  

* Antenna Selection

• C. Xu, J. An, T. Bai, S. Sugiura, R. G. Maunder, L.-L. Yang, M. Di Renzo and L. Hanzo, “Antenna selection for reconfigurable intelligent surfaces: A transceiver-agnostic passive beamforming configuration,” IEEE Trans. Wireless Commun., vol. 22, no. 11, pp. 7756-7774, Nov. 2023.
  [arXiv]
  
  
  

Holographic MIMO (HMIMO)

• J. An, C. Yuen, C. Huang, M. Debbah, H. V. Poor and L. Hanzo, “A tutorial on holographic MIMO communications — Part I: Channel modeling and channel estimation,” IEEE Commun. Lett., vol. 27, no. 7, pp. 1664-1668, Jul. 2023. (Invited Paper)
  [arXiv]
• J. An, C. Yuen, C. Huang, M. Debbah, H. V. Poor and L. Hanzo, “A tutorial on holographic MIMO communications — Part II: Performance analysis and holographic beamforming,” IEEE Commun. Lett., vol. 27, no. 7, pp. 1669-1673, Jul. 2023. (Invited Paper)
  [arXiv]
• J. An, C. Yuen, C. Huang, M. Debbah, H. V. Poor and L. Hanzo, “A tutorial on holographic MIMO communications — Part III: Open opportunities and challenges,” IEEE Commun. Lett., vol. 27, no. 7, pp. 1674-1678, Jul. 2023. (Invited Paper)
  [arXiv]
  
  
  

Integrated Sensing and Communications (ISAC)

• J. An, H. Li, D. W. K. Ng and C. Yuen, “Fundamental detection probability vs. achievable rate tradeoff in integrated sensing and communication systems,” IEEE Trans. Wireless Commun., vol. 22, no. 12, pp. 9835-9853, Dec. 2023.
  [arXiv]