Jun Wang, Cheng‐Xiang Wang, Jie Huang, Haiming Wang
Terahertz (THz) communication is now being considered as one of possible technologies for the sixth generation (6G) communication systems. In this paper, a novel three-dimensional (3D) space-time-frequency non-stationary massive multiple-input multiple-output (MIMO) channel model for 6G THz indoor c...
Yinglan Bu, Jie Huang, Yue Yang, Chen Huang et al.
The holographic multiple-input multiple-output (MIMO) transmission allows for a compact arrangement of antenna elements within a limited aperture and can achieve efficient analog beamforming (ABF). However, the optimal array element density in terms of the overall system performance still needs to b...
Yulin Wang, Xiping Wu, Cheng‐Xiang Wang, Gan Zheng et al.
An indoor visible light communication (VLC) positioning system is proposed to address line-of-sight (LoS) blockage in complex environments. The system integrates optical intelligent reflecting surfaces (OIRSs) with retroreflectors to form a bidirectional light path: LED to OIRS, then to the retroref...
Xiaojuan Yan, Cheng‐Xiang Wang, Kang An, Jinwei Wu
In this paper, a system capacity maximization problem of power domain non-orthogonal multiple access (NOMA) based satellite networks is proposed to determine the power control scheme. Specifically, under the constraints of both users’ various delay quality-of-service (QoS) requirements and minimum r...
Pinhan Chen, Cheng‐Xiang Wang, Hengtai Chang, Zhen Lv
To achieve the ambitious goals of global-coverage, complete applications, and all-spectra in the sixth generation (6G) mobile networks, channel modeling and characteristics analysis are crucial. This paper proposes an unmanned aerial vehicle (UAV)-to-ground channel model with massive multipleinput m...
Wu Yang, Yuhang Pan, Jianghan Ji, Cheng‐Xiang Wang et al.
Traditional geometry-based positioning methods (GPMs) suffer from low accuracy in non-line-of-sight (NLOS) environments, while fingerprint-based methods (FPMs) encounter high maintenance costs due to the need for continuous database updates. As an emerging unsupervised technique, channel charting ca...
Wenqi Zhou, Cheng‐Xiang Wang, Chen Huang, Rui Feng et al.
The sixth generation (6G) wireless communication envisions global coverage, all spectra, and full applications, which correspondingly creates many new communication scenarios. As the foundation of 6G communication system design, network planning, and optimization, more intelligent scenario identific...
Yingzhuo Sun, Cheng‐Xiang Wang, Jie Huang, Jun Wang
In this paper, a three-dimensional (3D) geometry based stochastic model (GBSM) for a massive multiple-input multiple-output (MIMO) communication system employing practical discrete intelligent reflecting surface (IRS) is proposed. The proposed channel model supports the scenario where both transceiv...
Yingzhuo Sun, Cheng‐Xiang Wang, Jie Huang, Jun Wang
As one of the key technologies for the sixth generation (6G) mobile communications, intelligent reflecting surface IRS) has the advantages of low power consumption, low cost, and simple design methods. But channel modeling is still an open issue in this field currently. In this paper, we propose a t...
Qingshan Chen, Cheng‐Xiang Wang, Jian Sun, Wensheng Zhang et al.
In recent years, the application potential of visible light communication (VLC) technology as an alternative and supplement to radio frequency (RF) technology has attracted people's attention. The study of the underlying VLC channel is the basis for designing the VLC communication system. In this pa...
Yu Fu, Cheng‐Xiang Wang, Xuming Fang, Li Yan et al.
In this paper, the bit error rate (BER) performance of spatial modulation (SM) systems is investigated both theoretically and by simulation in a non-stationary Kronecker-based massive multiple-input-multiple-output (MIMO) channel model in multi-user (MU) scenarios. Massive MIMO SM systems are consid...
Yunzeng Li, Wensheng Zhang, Cheng‐Xiang Wang, Jian Sun et al.
In this paper, the problem of dynamic spectrum sensing and aggregation is investigated in a wireless network containing N correlated channels, where these channels are occupied or vacant following an unknown joint 2-state Markov model. At each time slot, a single cognitive user with certain bandwidt...