28 citations · 73 across the 34 of their papers we have counts for
34 papers
Revealing the Impact of SIC in NOMA-ISAC
Chongjun Ouyang, Yuanwei Liu, Hongwen Yang
The impact of successive interference cancellation (SIC) in non-orthogonal multiple access integrated sensing and communications (NOMA-ISAC) is analyzed. A two-stage SIC-based fram…
Secure Antenna Selection and Beamforming in MIMO Systems
Zhenqiao Cheng, Nanxi Li, Ruizhe Long +3
This work proposes a novel joint design for multiuser multiple-input multiple-output wiretap channels. The base station exploits a switching network to connect a subset of its ante…
Joint Receive Antenna Selection and Beamforming in RIS-Aided MIMO Systems
Chongjun Ouyang, Ali Bereyhi, Saba Asaad +2
This work studies a low-complexity design for reconfigurable intelligent surface (RIS)-aided multiuser multiple-input multiple-output systems. The base station (BS) applies receive…
Statistical-CSI-Based Antenna Selection and Precoding in Uplink MIMO
Chongjun Ouyang, Ali Bereyhi, Saba Asaad +2
Classical antenna selection schemes require instantaneous channel state information (CSI). This leads to high signaling overhead in the system. This work proposes a novel joint rec…
MIMO-ISAC: Performance Analysis and Rate Region Characterization
Chongjun Ouyang, Yuanwei Liu, Hongwen Yang
This article analyzes the performance of sensing and communications (S\&C) achieved by a multiple-input multiple-output downlink integrated S\&C (ISAC) system. Three ISAC scenarios…
Lens Antenna Arrays-Assisted mmWave MU-MIMO Uplink Transmission: Joint Beam Selection and Phase-Only Beamforming Design
Chongjun Ouyang, Hao Xu, Xujie Zang +1
This paper considers a lens antenna array-assisted millimeter wave (mmWave) multiuser multiple-input multiple-output (MU-MIMO) system. The base station's beam selection matrix and…
Some Discussions on PHY Security in DF Relay
Chongjun Ouyang, Hao Xu, Xujie Zang +1
Physical layer (PHY) security in decode-and-forward (DF) relay systems is discussed. Based on the types of wiretap links, the secrecy performance of three typical secure DF relay m…
A Lightweight Dual-Domain Attention Framework for Sparse-View CT Reconstruction
Chang Sun, Ken Deng, Yitong Liu +1
Computed Tomography (CT) plays an essential role in clinical diagnosis. Due to the adverse effects of radiation on patients, the radiation dose is expected to be reduced as low as…
Performance of Downlink and Uplink Integrated Sensing and Communications (ISAC) Systems
Chongjun Ouyang, Yuanwei Liu, Hongwen Yang
This letter analyzes the fundamental performance of integrated sensing and communications (ISAC) systems. For downlink and uplink ISAC, the diversity orders are analyzed to evaluat…
On the Performance of Uplink ISAC Systems
Chongjun Ouyang, Yuanwei Liu, Hongwen Yang
This letter analyzes the performance of uplink integrated sensing and communications (ISAC) systems where communication users (CUs) and radar targets (RTs) share the same frequency…
On the Ergodic Mutual Information of Keyhole MIMO Channels With Finite-Alphabet Inputs
Chongjun Ouyang, Ali Bereyhi, Saba Asaad +3
This letter studies the ergodic mutual information (EMI) of keyhole multiple-input multiple-output channels having finite-alphabet input signals. The EMI is first investigated for…
On the Ergodic Capacity of Reconfigurable Intelligent Surface (RIS)-Aided MIMO Channels
Chongjun Ouyang, Hao Xu, Xujie Zang +1
Reconfigurable intelligent surfaces (RISs) have emerged as a promising technique to enhance the system spectral efficiency. This paper investigates the ergodic channel capacity (EC…
Expectation-Maximization-Aided Hybrid Generalized Expectation Consistent for Sparse Signal Reconstruction
Qiuyun Zou, Haochuan Zhang, Hongwen Yang
The reconstruction of sparse signal is an active area of research. Different from a typical i.i.d. assumption, this paper considers a non-independent prior of group structure. For…
A Lightweight Structure Aimed to Utilize Spatial Correlation for Sparse-View CT Reconstruction
Yitong Liu, Ken Deng, Chang Sun +1
Sparse-view computed tomography (CT) is known as a widely used approach to reduce radiation dose while accelerating imaging through lowered projection views and correlated calculat…
Real-Time Limited-View CT Inpainting and Reconstruction with Dual Domain Based on Spatial Information
Ken Deng, Chang Sun, Yitong Liu +1
Low-dose Computed Tomography is a common issue in reality. Current reduction, sparse sampling and limited-view scanning can all cause it. Between them, limited-view CT is general i…
Physical Layer Security Over Mixture Gamma Distributed Fading Channels With Discrete Inputs: A Unified and General Analytical Framework
Chongjun Ouyang, Sheng Wu, Chunxiao Jiang +2
Physical layer security is investigated over mixture Gamma (MG) distributed fading channels with discrete inputs. By the Gaussian quadrature rules, closed-form expressions are deri…
Estimation for High-Dimensional Multi-Layer Generalized Linear Model -- Part II: The ML-GAMP Estimator
Qiuyun Zou, Haochuan Zhang, Hongwen Yang
This is Part II of a two-part work on the estimation for a multi-layer generalized linear model (ML-GLM) in large system limits. In Part I, we had analyzed the asymptotic performan…
Estimation for High-Dimensional Multi-Layer Generalized Linear Model -- Part I: The Exact MMSE Estimator
Haochuan Zhang, Qiuyun Zou, Hongwen Yang
This two-part work considers the minimum means square error (MMSE) estimation problem for a high dimensional multi-layer generalized linear model (ML-GLM), which resembles a feed-f…
Multi-Layer Bilinear Generalized Approximate Message Passing
Qiuyun Zou, Haochuan Zhang, Hongwen Yang
In this paper, we extend the bilinear generalized approximate message passing (BiG-AMP) approach, originally proposed for high-dimensional generalized bilinear regression, to the m…
Secrecy Performance for Finite-Alphabet Inputs Over Fluctuating Two-Ray Channels in FDA Communications
Chongjun Ouyang, Sheng Wu, Chunxiao Jiang +2
To provide system design insights for practical communication systems equipped with the frequency diverse array (FDA), this paper investigates the secrecy performance of FDA system…
Massive Access in Multi-cell Wireless Networks Using Reed-Muller Codes
Pei Yang, Dongning Guo, Hongwen Yang
Providing connectivity to a massive number of devices is a key challenge in 5G wireless systems. In particular, it is crucial to develop efficient methods for active device identif…
Mutual Information Approximation
Chongjun Ouyang, Sheng Wu, Hongwen Yang
To provide an efficient approach to characterize the input-output mutual information (MI) under additive white Gaussian noise (AWGN) channel, this short report fits the curves of e…
Enabling NB-IoT on Unlicensed Spectrum
Rongrong Sun, Salvatore Talarico, Wenting Chang +2
The deployment of Internet of Things (IoT) technologies in unlicensed spectrum is a candidate feature for 5G to support massive connections of IoT devices. Current IoT unlicensed b…
Secrecy Performance of Antenna-Selection-Aided MIMOME Channels with BPSK/QPSK Modulations
Chongjun Ouyang, Zeliang Ou, Lu Zhang +2
This paper studies the secrecy performance of multiple-input multiple-output (MIMO) wiretap channels, also termed as multiple-input multiple-output multiple-eavesdropper (MIMOME) c…