Search Results for author: Chongjun Ouyang

Found 12 papers, 0 papers with code

Active Simultaneously Transmitting and Reflecting Surface Assisted NOMA Networks

no code implementations25 Jan 2024 Xinwei Yue, Jin Xie, Chongjun Ouyang, Yuanwei Liu, Xia Shen, Zhiguo Ding

The numerical results are presented and show that: 1) ASTARS-NOMA with pSIC outperforms ASTARS assisted-orthogonal multiple access (ASTARS-OMA) in terms of outage probability and ergodic data rate; 2) The outage probability of ASTARS-NOMA can be further reduced within a certain range by increasing the power amplification factors; 3) The system throughputs of ASTARS-NOMA are superior to that of ASTARS-OMA in both delay-limited and delay-tolerant transmission modes.

Near-Field Communications: A Comprehensive Survey

no code implementations11 Jan 2024 Yuanwei Liu, Chongjun Ouyang, Zhaolin Wang, Jiaqi Xu, Xidong Mu, A. Lee Swindlehurst

This evolution is giving rise to the emergence of near-field communications (NFC) in future wireless systems.

Enabling Secure Wireless Communications via Movable Antennas

no code implementations21 Dec 2023 Zhenqiao Cheng, Nanxi Li, Jianchi Zhu, Xiaoming She, Chongjun Ouyang, Peng Chen

A pioneering secure transmission scheme is proposed, which harnesses movable antennas (MAs) to optimize antenna positions for augmenting the physical layer security.

Position

Sum-Rate Optimization for RIS-Aided Multiuser Communications with Movable Antenna

no code implementations11 Nov 2023 Yunan Sun, Hao Xu, Chongjun Ouyang, Hongwen Yang

Numerical results are presented to verify the effectiveness of the proposed algorithm and the superiority of the proposed MA-based system in terms of sum-rate.

Position

Movable Antenna-Empowered AirComp

no code implementations22 Sep 2023 Zhenqiao Cheng, Nanxi Li, Jianchi Zhu, Xiaoming She, Chongjun Ouyang, Peng Chen

A novel over-the-air computation (AirComp) framework, empowered by the incorporation of movable antennas (MAs), is proposed to significantly enhance computation accuracy.

Position

Sum-Rate Maximization for Movable Antenna Enabled Multiuser Communications

no code implementations20 Sep 2023 Zhenqiao Cheng, Nanxi Li, Jianchi Zhu, Chongjun Ouyang

A novel multiuser communication system with movable antennas (MAs) is proposed, where the antenna position optimization is exploited to enhance the downlink sum-rate.

Position

Secure Antenna Selection and Beamforming in MIMO Systems

no code implementations22 Feb 2023 Chongjun Ouyang, Hao Xu, Xujie Zang, Hongwen Yang

This work proposes a novel joint design for multiuser multiple-input multiple-output wiretap channels.

Joint Receive Antenna Selection and Beamforming in RIS-Aided MIMO Systems

no code implementations28 Dec 2022 Chongjun Ouyang, Ali Bereyhi, Saba Asaad, Ralf R. Müller, Hongwen Yang

This work studies a low-complexity design for reconfigurable intelligent surface (RIS)-aided multiuser multiple-input multiple-output systems.

Statistical-CSI-Based Antenna Selection and Precoding in Uplink MIMO

no code implementations28 Dec 2022 Chongjun Ouyang, Ali Bereyhi, Saba Asaad, Ralf R. Müller, Hongwen Yang

This work proposes a novel joint receive antenna selection and precoding scheme for multiuser multiple-input multiple-output uplink transmission that relies only on the long-term statistics of the CSI.

Lens Antenna Arrays-Assisted mmWave MU-MIMO Uplink Transmission: Joint Beam Selection and Phase-Only Beamforming Design

no code implementations20 Jul 2022 Chongjun Ouyang, Hao Xu, Xujie Zang, Hongwen Yang

This paper considers a lens antenna array-assisted millimeter wave (mmWave) multiuser multiple-input multiple-output (MU-MIMO) system.

Secrecy Performance for Finite-Alphabet Inputs Over Fluctuating Two-Ray Channels in FDA Communications

no code implementations11 Jun 2020 Chongjun Ouyang, Sheng Wu, Chunxiao Jiang, Derrick Wing Kwan Ng, Hongwen Yang

To provide system design insights for practical communication systems equipped with the frequency diverse array (FDA), this paper investigates the secrecy performance of FDA systems exploiting finite-alphabet inputs over fluctuating two-ray (FTR) fading channels.

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