Research Topics

Near-Field Wireless Transmission

Next-Generation Multiple Access

Continuous Aperture Array

Low-RF-Complexity and New Antenna Technologies

Finite-Alphabet Signaling

Near-Field Wireless Transmission

- Near-Field Communications

- Near-Field Sensing (NISE)

- Near-Field Localization

1. Near-Field Communications: A Comprehensive Survey [Arxiv]
   Yuanwei Liu, Chongjun Ouyang, Zhaolin Wang, Jiaqi Xu, Xidong Mu, and A. Lee Swindlehurst
   IEEE Communications Surveys & Tutorials, 2024+

2. A Primer on Near-Field Communications for Next-Generation Multiple Access [Arxiv]
   Chongjun Ouyang, Zhaolin Wang, Yan Chen, Xidong Mu, and Peiying Zhu
   Proceedings of the IEEE, 2024+

3. On the Impact of Reactive Region on the Near-Field Channel Gain [Arxiv]
   Chongjun Ouyang, Zhaolin Wang, Boqun Zhao, Xingqi Zhang, and Yuanwei Liu
   IEEE Communications Letters, Vol. 28, No. 10, Pages 2417 - 2421, October 2024

4. Modeling and Analysis of Near-Field ISAC [Arxiv]
   Boqun Zhao, Chongjun Ouyang, Yuanwei Liu, Xingqi Zhang, and H. Vincent Poor
   IEEE Journal of Selected Topics in Signal Processing, Vol. 18, No. 4, Pages 678 - 693, May 2024

5. Near-Field Communications: A Tutorial Review [Arxiv]
   Yuanwei Liu, Zhaolin Wang, Jiaqi Xu, Chongjun Ouyang, Xidong Mu, and Robert Schober
   IEEE Open Journal of the Communications Society, Vol. 4, Pages 1999 - 2049, 2024

Next-Generation Multiple Access (NGMA)

- Integrated Sensing and Communications

- Non-orthogonal Multiple Access (NOMA)

1. The Road to Next-Generation Multiple Access: A 50-Year Tutorial Review [Arxiv]
   Yuanwei Liu, Chongjun Ouyang, Zhiguo Ding, and Robert Schober
   Proceedings of the IEEE, 2024+

2. Revealing the Impact of Beamforming in ISAC [Arxiv]
   Chongjun Ouyang, Yuanwei Liu, and Xingqi Zhang
   IEEE Wireless Communications Letters, Vol. 13, No. 2, Pages 362 - 366, February 2024

3. Revealing the Impact of SIC in NOMA-ISAC [Arxiv]
   Chongjun Ouyang, Yuanwei Liu, and Hongwen Yang
   IEEE Wireless Communications Letters, Vol. 12, No. 10, Pages 1707 - 1711, October 2023

4. Integrated Sensing and Communications: A Mutual Information-Based Framework [Arxiv]
   Chongjun Ouyang, Yuanwei Liu, Hongwen Yang, and Naofal Al-Dhahir
   IEEE Communications Magazine, Vol. 61, No. 5, Pages 26 - 32, May 2023

5. MIMO-ISAC: Performance Analysis and Rate Region Characterization [Arxiv] [Code]
   Chongjun Ouyang, Yuanwei Liu, and Hongwen Yang
   IEEE Wireless Communications Letters, Vol. 12, No. 4, Pages 669 - 673, April 2023

6. Performance of Downlink and Uplink Integrated Sensing and Communications (ISAC) Systems [Arxiv] [Code]
   Chongjun Ouyang, Yuanwei Liu, and Hongwen Yang
   IEEE Wireless Communications Letters, Vol. 11, No. 9, Pages 1850 - 1854, September 2022

Continuous Aperture Array (CAPA)

- Holographic Multiple-Input Multiple-Output (MIMO)

- Electromagnetic Information Theory

- Wave Theory of Information

1. Continuous Aperture Array (CAPA)-Based Wireless Communications: Capacity Characterization
   Boqun Zhao, Chongjun Ouyang, Xingqi Zhang, and Yuanwei Liu
   Submitted to IEEE Transactions on Wireless Communications, June 2024

Low-RF-Complexity and New Antenna Technologies

- Fluid/Movable/Flexible/Pinching Antenna

- Lens Antenna Array

- Dynamic Metasurface Antenna (DMA)

- Phased Array/Reconfigurable Intelligent Surface

- Antenna Selection

1. Sum-Rate Maximization for Fluid Antenna Enabled Multiuser Communications [Arxiv]
   Zhenqiao Cheng, Nanxi Li, Jianchi Zhu, Xiaoming She, Chongjun Ouyang, and Peng Chen
   IEEE Communications Letters, Vol. 28, No. 5, Pages 1206 - 1210, May 2024

2. Enabling Secure Wireless Communications via Movable Antennas
   Zhenqiao Cheng, Nanxi Li, Jianchi Zhu, Xiaoming She, Chongjun Ouyang, and Peng Chen
   Proc. of ICASSP 2024 - 2024 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), Seoul, Korea, Republic of, 14-19 April 2024

3. RIS-Assisted mmWave MIMO Communications With Finite-Alphabet Inputs and Partial CSI
   Hao Xu, Chongjun Ouyang, and Hongwen Yang
   IEEE Wireless Communications Letters, Vol. 13, No. 5, Pages 1339 - 1343, May 2024

4. RIS-Assisted Secure Communications: Low-Complexity Beamforming Design
   Zhenqiao Cheng, Nanxi Li, Jianchi Zhu, Xiaoming She, Chongjun Ouyang, and Peng Chen
   IEEE Wireless Communications Letters, Vol. 12, No. 6, Pages 1012 - 1016, June 2023

5. Antenna Selection for IRS-Aided MU-MIMO
   Hao Xu, Chongjun Ouyang, and Hongwen Yang
   IEEE Communications Letters, Vol. 26, No. 11, Pages 2690 - 2694, November 2022

6. Joint RF Precoding and Beam Selection Design for Uplink mmWave Beamspace MIMO Systems
   Zhenqiao Cheng, Zaixue Wei, Chongjun Ouyang, and Hongwen Yang
   IEEE Communications Letters, Vol. 26, No. 8, Pages 1833 - 1837, August 2022

Finite-Alphabet Signaling

1. On the Ergodic Mutual Information of Keyhole MIMO Channels With Finite-Alphabet Inputs [Arxiv]
   Chongjun Ouyang, Ali Bereyhi, Saba Asaad, Ralf R. Müller, Julian Cheng, and Hongwen Yang
   IEEE Communications Letters, Vol. 27, No. 1, Pages 90 - 94, January 2023

2. Physical Layer Security Over Mixture Gamma Distributed Fading Channels With Discrete Inputs: A Unified and General Analytical Framework
   Chongjun Ouyang, Sheng Wu, Chunxiao Jiang, Julian Cheng, and Hongwen Yang
   IEEE Communications Letters, Vol. 25, No. 2, Pages 412 - 416, February 2021

3. Receive Antenna Selection Under Discrete Inputs: Approximation and Applications
   Chongjun Ouyang, Sheng Wu, Chunxiao Jiang, Derrick Wing Kwan Ng, and Hongwen Yang
   IEEE Transactions on Communications, Vol. 68, No. 4, Pages 2634 - 2647, April 2020