Yongpeng Wu, Xiqi Gao, Shidong Zhou, Wei Yang et al.
Multiple access technology played an important role in wireless communication in the last decades: it increases the capacity of the channel and allows different users to access the system simultaneously. However, the conventional multiple access technology, as originally designed for current human-c...
Yongpeng Wu, Chengshan Xiao, Zhi Ding, Xiqi Gao et al.
Multiple antennas have played an essential role in spatial multiplexing and diversity transmission for a wide range of communication applications. Most advances in the design of high-speed wireless multiple-input-multiple-output (MIMO) systems have been based on information-theoretic principles that...
Shicong Liu, Zhen Gao, Yongpeng Wu, Derrick Wing Kwan Ng et al.
The rapid development of communication technologies in the past decades has provided immense vertical opportunities for individuals and enterprises. However, conventional terrestrial cellular networks have unfortunately neglected the huge geographical digital divide, since high bandwidth wireless co...
Malong Ke, Zhen Gao, Yongpeng Wu, Xiqi Gao et al.
This paper studies massive access in cell-free massive multi-input multi-output (MIMO) based Internet of Things and solves the challenging active user detection (AUD) and channel estimation (CE) problems. For the uplink transmission, we propose an advanced frame structure design to reduce the access...
Yongpeng Wu, Xiqi Gao, Shidong Zhou, Wei Yang et al.
Multiple access technology played an important role in wireless communication in the last decades: it increases the capacity of the channel and allows different users to access the system simultaneously. However, the conventional multiple access technology, as originally designed for current human-c...
Yongpeng Wu, Lv Ding, Jiee Chen, Xiqi Gao
This paper studies the optimum combining (OC) system with multiple arbitrary-power interferers and thermal noise in a flat Rayleigh fading environment. The main contribution of the paper is a concise performance analysis for the overload OC system where the number of interferers exceeds or is equal ...
Yongpeng Wu, Chao-Kai Wen, Chengshan Xiao, Xiqi Gao et al.
In this paper, we investigate the design of linear precoders for multiple-input multiple-output (MIMO) multiple access channels (MAC). We assume that statistical channel state information (CSI) is available at the transmitters and consider the problem under the practical finite alphabet input assump...
Jian Dang, Chunguo Li, Kang Song, Yongpeng Wu et al.
This paper proposes a unified sparse transmission framework for coded modulation-based unsourced random access (URA) systems, referred to as sparse linear precoded URA (SLP-URA). The proposed design generalizes and unifies a variety of existing URA schemes including random spreading, sparse interlea...
Yongpeng Wu, Bin Jiang, Xiqi Gao
In this paper, we study the performance of base station (BS) cooperation for downlink transmission. Based on a modified Wyner multicell model, an opportunistic intra cell scheduling scheme is proposed. Then, we derive a closed-form expression for the sum-rate capacity of the proposed scheme in the R...