Lei Chen

ORCID: 0000-0001-5882-7420
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About
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Research Areas
  • Advanced MIMO Systems Optimization
  • Cooperative Communication and Network Coding
  • Full-Duplex Wireless Communications
  • Advanced Wireless Network Optimization
  • Energy Harvesting in Wireless Networks
  • Opportunistic and Delay-Tolerant Networks
  • Distributed Control Multi-Agent Systems
  • Advanced Wireless Communication Techniques
  • UAV Applications and Optimization
  • Caching and Content Delivery
  • Semiconductor Lasers and Optical Devices
  • Optical Network Technologies
  • Advanced Photonic Communication Systems
  • Antenna Design and Analysis
  • Wireless Communication Security Techniques

Beijing Institute of Technology
2024

Beijing University of Posts and Telecommunications
2012-2017

Harbin Institute of Technology
2015

Huawei Technologies (China)
2012

With the dense deployment of small cell networks, powering and backhaul problem base stations (SBSs) has attracted great attention, energy harvesting technology self-backhaul have been proposed as promising solutions. Although some excellent works done on in most existing do not consider them jointly. In this paper, we aim at green networks by jointly achieving harvesting. addition, full-duplex massive multiple-input multiple-output technologies are also exploited to enhance system...

10.1109/jsac.2016.2611846 article EN IEEE Journal on Selected Areas in Communications 2016-09-20

Wireless network virtualization has attracted great attention from both academia and industry. Another emerging technology for next-generation wireless networks is in-band full-duplex (FD) communications. Due to its promising performance, FD communication been considered be an effective way of achieving self-backhauls small cells. In this paper, we introduce into small-cell propose a virtualized architecture with self-backhauls. We formulate the virtual-resource-allocation problem in as...

10.1109/tvt.2015.2469149 article EN IEEE Transactions on Vehicular Technology 2015-08-17

With the explosive increase of wireless data traffic, caching is regarded as a promising technology to combine with heterogeneous cellular networks (HCNs), which can offload traffic and improve system performance effectively. In this paper, we investigate communication scenario about cache-enabled HCNs device-to- device (D2D) communications. Both small cell base stations (SBSs) D2D user equipments (DUEs) have hardware that store popular contents serve users locally. introduced, heavy load in...

10.1109/wcnc.2017.7925732 article EN 2022 IEEE Wireless Communications and Networking Conference (WCNC) 2017-03-01

With the deployment of small cell networks, low-cost backhaul schemes for base stations (SBSs) have attracted great attentions. Self-backhaul using cellular communication technology is considered as a promising solution. Although some excellent works been done on self-backhaul in most existing do not consider recent advances full-duplex (FD) and massive multiple-input multiple-output (MIMO) technologies. By jointly considering them, we propose novel scheme networks this paper, where macro...

10.1109/icc.2016.7511567 article EN 2016-05-01

In this paper, we aim at green small cell networks by jointly achieving self-backhaul and energy harvesting. We study full duplex (FD) technology massive multiple-input multiple-output (MIMO) to enhance the performance. order improve efficiency (EE) further, design a precoding scheme eliminate inter-tier interference. Moreover, formulate association power allocation problem as an optimization optimize EE of considered network with considering arrival rate remainder battery in SBSs. The...

10.1109/icc.2016.7510700 article EN 2016-05-01

The full-duplex relay is an expansion of technique. In this paper, we investigate the outage performance multi-hop decode-and-forward (DF) system over Nakagami-m fading channels. theoretical expression based on infinite Gamma series representation for end-to-end probability DF derived first time. Besides, a loose lower bound and highly accurate approximation are presented. With increasing self-interference energy, even worse than that half-duplex system. Moreover, simulation results confirm...

10.1109/iccchina.2015.7448615 article EN 2022 IEEE/CIC International Conference on Communications in China (ICCC) 2015-11-01

Tomlinson-Harashima precoding (THP), as a suboptimal realization of dirty paper coding, has attracted extensive attentions in recent years. However, numerous studies, only few them considered the limitations and restrictions reality. In this paper, we first point out three main THP when implementing it framework real industrial system, i.e., Long Term Evolution Advanced (LTE-A). Then, propose physical layer solution for LTE-A, which mainly involves schemes Physical Downlink Shared Channel...

10.1109/glocomw.2012.6477585 article EN 2012-12-01

With the dense deployment of femtocell, interference control is becoming a major challenge for resource management in femtocell networks. Most existing works focus on improving throughput or reducing total power consumption respectively, neglecting energy consumption. In this paper, we investigate efficiency aspect network and propose an interference-mitigation channel allocation algorithm aiming to maximize with QoS constraints. The also mitigates co-tiered cross-tiered interference....

10.1109/wcnc.2014.6952691 article EN 2022 IEEE Wireless Communications and Networking Conference (WCNC) 2014-04-01

This paper propose an optimal resource allocation algorithm by exploiting opportunistic multicast scheduling (OMS) scheme using layered coding combined with erasure correction for services in the downlink of OFDMA-based single frequency networks (SFN). In this algorithm, we exploit unequal error protection (UEP) Reed-Solomon (RS) to compensate possible data packet loss base layer and enhancement layers which are obtained from fine-granularity-scalability (FGS) video coding. order reduce...

10.1109/icc.2012.6364666 article EN 2012-06-01

With the dense deployment of small cell networks, low-cost backhaul schemes for base stations (SBSs) have attracted great attentions. Self-backhaul using cellular communication technology is considered as a promising solution. Although some excellent works been done on self-backhaul in most them do not consider recent advances full-duplex (FD) and massive multiple-input multiple-output (MIMO) technologies. In this paper, we propose scheme networks by combining FD MIMO our proposed scheme,...

10.48550/arxiv.1611.06302 preprint EN other-oa arXiv (Cornell University) 2016-01-01

Wireless network virtualization has attracted great attentions from both academia and industry. Another emerging technology for next generation wireless networks is in-band full duplex (FD) communications. Due to its promising performance, FD communication been considered as an effective way achieve self- backhauls small cells. In this paper, we introduce into cell networks, propose a virtualized architecture with self-backhauls. We formulate the virtual resource allocation problem in...

10.1109/glocom.2015.7417391 article EN 2015 IEEE Global Communications Conference (GLOBECOM) 2015-12-01

To ensure the thriving development of low-altitude economy, countering unauthorized unmanned aerial vehicles (UAVs) is an essential task. The existing widely deployed base stations hold great potential for joint communication and jamming. In light this, this paper investigates design beamforming to simultaneously support with legitimate users countermeasure against UAVs based on dual-functional multiple-input multiple-output (MIMO) cellular systems. We first formulate a jamming (JCJ)...

10.48550/arxiv.2410.22746 preprint EN arXiv (Cornell University) 2024-10-30

10.1016/s1005-8885(14)60301-0 article EN The Journal of China Universities of Posts and Telecommunications 2014-06-01

We experimentally demonstrate a Q-band seamlessly integrated fiber-wireless system, where 80 Gb/s dual-polarization (DP) 16 quadrature-amplitude-modulation (DP-16QAM) is transmitted over 50-km single-mode fiber-28 (SMF-28) wire link, 0.5-m 2×2 multiple-input multiple-output wireless and finally, another SMF-28 link. Conventional multimodulus-algorithm equalization introduced at the receiver to realize polarization demultiplexing minimize crosstalk between two polarizations. For first time,...

10.1117/1.oe.53.10.106104 article EN Optical Engineering 2014-10-09

Wireless network virtualization has attracted great attentions from both academia and industry. Another emerging technology for next generation wireless networks is in-band full duplex (FD) communications. Due to its promising performance, FD communication been considered as an effective way achieve self-backhauls small cells. In this paper, we introduce into cell networks, propose a virtualized architecture with self-backhauls. We formulate the virtual resource allocation problem in...

10.48550/arxiv.1510.05746 preprint EN other-oa arXiv (Cornell University) 2015-01-01

This paper propose an optimal resource allocation algorithm by exploiting layered coding combined with erasure correction for multicast services in the downlink of OFDMA-based single frequency networks (SFN). In this algorithm, we exploit unequal error protection (UEP) Reed-Solomon (RS) to compensate possible data packet loss base layer and enhancement layers which are obtained from fine-granularity-scalability (FGS) video coding. order reduce feedback load, BSs only utilize average channel...

10.1109/vtcfall.2012.6398947 article EN 2012-09-01

Wireless network virtualization has attracted great attentions from both academia and industry. Another emerging technology for next generation wireless networks is in-band full duplex (FD) communications. Due to its promising performance, FD communication been considered as an effective way achieve self- backhauls small cells. In this paper, we introduce into cell networks, propose a virtualized architecture with self-backhauls. We formulate the virtual resource allocation problem in...

10.1109/glocom.2014.7417391 article EN 2015 IEEE Global Communications Conference (GLOBECOM) 2014-12-01

In conventional multicast scheme (CMS), the total throughput of group is constrained by user with worst channel quality. order to overcome this problem limited throughput, we consider a resource allocation algorithm based on layered coding, when feedback considered. A novel subcarrier and power exploited for targeting maximum (MT) enhancement layers while at same time guaranteeing quality services (QoS) requirements all users. paper, three-step two algorithms are proposed. Simulation results...

10.1109/pimrc.2012.6362804 article EN 2012-09-01

In conventional multicast scheme (CMS), the total throughput of group is constrained by user with worst channel quality. order to overcome this problem limited throughput, we consider an opportunistic scheduling (OMS) based on layered coding. A novel subcarrier and bit allocation algorithm exploited for targeting maximum (MT) a whole while at same time guaranteeing quality services (QoS) requirements all users. paper, propose optimal resource in downlink OFDMA-based wireless group. two-phase...

10.1109/icc.2012.6364668 article EN 2012-06-01
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