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Xiaoming Chen
Zhejiang University
Channel state informationCommunication channelMIMOComputer networkComputer science
104Publications
24H-index
2,098Citations
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Publications 114
Newest
#1Rui YinH-Index: 19
Last. Xiaoming ChenH-Index: 24
view all 6 authors...
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#1Qiao QiH-Index: 1
#2Xiaoming ChenH-Index: 24
Last. Zhaoyang ZhangH-Index: 32
view all 4 authors...
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#1Rundong Jia (ZJU: Zhejiang University)H-Index: 3
#2Xiaoming Chen (ZJU: Zhejiang University)H-Index: 24
Last. Hai Lin (OPU: Osaka Prefecture University)H-Index: 16
view all 4 authors...
In this article, we investigate the issue of massive access in a beyond fifth-generation (B5G) cellular Internet of Things (IoT) network. To reduce the overhead of channel state information acquisition and the complexity of transceiver design, an integrated framework of massive beam-division multiple access (BDMA) is proposed according to the characteristics of beamspace propagation. Then, we analyze the performance of the proposed massive BDMA scheme and derive a closed-form expression for the ...
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#1Xiaoling HuH-Index: 1
#2Caijun ZhongH-Index: 31
Last. Zhaoyang ZhangH-Index: 32
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This paper considers a multi-antenna multicast system with programmable metasurface (PMS) based transmitter. Taking into account of the finite-resolution phase shifts of PMSs, a novel beam training approach is proposed, which achieves comparable performance as the exhaustive beam searching method but with much lower time overhead. Then, a closed-form expression for the achievable multicast rate is presented, which is valid for arbitrary system configurations. In addition, for certain asymptotic ...
#1Xiaoming Chen (ZJU: Zhejiang University)H-Index: 24
#2Derrick Wing Kwan Ng (UNSW: University of New South Wales)H-Index: 38
Last. Robert Schober (FAU: University of Erlangen-Nuremberg)H-Index: 61
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Massive access, also known as massive connectivity or massive machine-type communication (mMTC), is one of the main use cases of the fifth-generation (5G) and beyond 5G (B5G) wireless networks. A typical application of massive access is the cellular Internet of Things (IoT). Different from conventional human-type communication, massive access aims at realizing efficient and reliable communications for a massive number of IoT devices. Hence, the main characteristics of massive access include low ...
1 Citations
#2Xiaoming ChenH-Index: 24
Last. Zhaoyang ZhangH-Index: 32
view all 4 authors...
Millimeter-wave/Terahertz (mmW/THz) communications have shown great potential for wideband massive access in next-generation cellular internet of things (IoT) networks. To decrease the length of pilot sequences and the computational complexity in wideband massive access, this paper propose a novel joint activity detection and channel estimation (JADCE) algorithm. Specifically, after formulating JADCE as a problem of recovering a simultaneously sparse-group and low rank matrix according to the ch...
1 Citations
#1Qiao Qi (ZJU: Zhejiang University)H-Index: 1
#1Qiao QiH-Index: 1
Last. Zhaoyang ZhangH-Index: 32
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The upcoming fifth generation (5G) cellular network is required to provide seamless access for a massive number of Internet of Things (IoT) devices over the limited radio spectrum. In the context of massive spectrum sharing among heterogeneous IoT devices, wireless security becomes a critical issue owing to the broadcast nature of wireless channels. According to the characteristics of the cellular IoT network, physical layer security (PHY-security) is a feasible and effective way of realizing se...
1 CitationsSource
Grant-free random access is a promising protocol to support massive access in beyond fifth-generation (B5G) cellular Internet-of-Things (IoT) with sporadic traffic. Specifically, in each coherence interval, the base station (BS) performs joint activity detection and channel estimation (JADCE) before data transmission. Due to the deployment of a large-scale antennas array and the existence of a huge number of IoT devices, JADCE usually has high computational complexity and needs long pilot sequen...
3 CitationsSource
#1Jiabao GaoH-Index: 1
#2Caijun ZhongH-Index: 31
Last. Zhaoyang ZhangH-Index: 32
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Reconfigurable intelligent surface (RIS) has recently emerged as a promising candidate to improve the energy and spectral efficiency of wireless communication systems. However, the unit modulus constraint on the phase shift of reflecting elements makes the design of optimal passive beamforming solution a challenging issue. The conventional approach is to find a suboptimal solution using the semi-definite relaxation (SDR) technique, yet the resultant suboptimal iterative algorithm usually incurs ...
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#1Qiao Qi (ZJU: Zhejiang University)H-Index: 1
#2Xiaoming Chen (ZJU: Zhejiang University)H-Index: 24
Last. Derrick Wing Kwan Ng (UNSW: University of New South Wales)H-Index: 38
view all 3 authors...
In this paper, we study the resource allocation design for non-orthogonal multiple access (NOMA)-based cellular massive Internet-of-Things (IoT) enabled with simultaneous wireless information and power transfer (SWIPT). The design is formulated as a non-convex optimization problem, which takes into account practical and adverse factors, e.g., the channel uncertainty during channel state information (CSI) acquisition, the non-linear receiver during energy harvesting (EH) and the imperfect success...
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