加拿大英属哥伦比亚大学的Julian Cheng教授讲座通知

发布时间:2017-07-03 09:17  浏览:224次

学术报告通知

加拿大英属哥伦比亚大学的Julian Cheng教授应信息网络体系构建与融合学科创新引智基地温向明教授邀请,将于2017年7月5日来北邮作学术报告。欢迎有兴趣的师生踊跃参与。

 

题目一: Energy Efficient Resource Allocation for Non-Orthogonal Multiple Access (NOMA) Wireless Networks

摘要:

Non-orthogonal multiple access (NOMA) is a promising technique for the fifth generation mobile communication due to its high spectral efficiency. By applying superposition coding and successive interference cancellation techniques at the receiver, multiple users can be multiplexed on the same subchannel in NOMA systems. Previous works focused on subchannel assignment and power allocation to achieve the maximization of sum rate; however, the energy-efficient resource allocation problem has not been well studied for NOMA systems. In the first part of this talk, we first discuss the energy efficient resource allocation for NOMA system with perfect channel state information (CSI). For this problem, we aim to optimize subchannel assignment and power allocation to maximize the energy efficiency for the downlink NOMA networks. We propose a low-complexity suboptimal algorithm which includes energy-efficient subchannel assignment and power proportional factors determination for subchannel multiplexed users. In the second part of this talk, we investigate energy efficiency improvement for a downlink NOMA single-cell network by considering imperfect CSI. The energy-efficient resource optimization problem is formulated as a non-convex optimization problem with the constraints of outage probability limit, the maximum power of the system, the minimum user data rate and the maximum number of multiplexed users sharing the same subchannel. A new suboptimal user scheduling scheme is proposed to schedule users on different subchannels. Based on the user scheduling scheme, the optimal power allocation expression is derived by the Lagrange approach. Simulation results demonstrate that the proposed user scheduling algorithm closely attains the optimal performance.

题目二: Indoor Visible Light Positioning Technology: Overview, State of the Art, and Recent Progress

摘要:

Due to the increasing demands for indoor location-based services, wireless indoor positioning system has attracted much research and development attention in recent years, and the market size for indoor positioning has been assessed to be tens of billions of dollars. Compared with other indoor positioning technologies such as radio frequency, infrared and ultra-sound, visible light positioning technology has the advantages of simpler infrastructure, more efficient energy use, and higher positioning accuracy. In this talk, we will first provide an overview of indoor positioning using visible light and its state of the art. While positioning with visible light communication (VLC) infrastructure can achieve centimeter-level accuracy, most existing VLC-positioning system prototypes have some practical limitations. To overcome these limitations, we propose a new VLC positioning technique called angle difference of arrival (ADOA), which allows for arbitrary tilting and pitching of the receivers. We demonstrate both numerically and experimentally that the proposed VLC positioning system based on ADOA can achieve accuracy of less than 1 centimeter.  The proposed VLC positioning technology, which has both low cost and low complexity, can be used in a wide variety of indoor positioning applications.

 

主讲人:Julian Cheng教授

主持人:刘芳芳博士

时间:201775日(星期三)上午10:00-11:30

地点:教三楼811

 

该讲座为前沿讲座,欢迎全校师生踊跃参加。

 

 

校学术委员会、信息与通信工程学院、信息网络体系构建与融合学科创新引智基地

         2017年6月23日

 

附主讲人简介:

Julian Cheng received his PhD degree in electrical engineering from the University of Alberta, Edmonton, AB, Canada. He is currently a Full Professor in the School of Engineering, Faculty of Applied Science, at The University of British Columbia, Okanagan campus in Kelowna, BC, Canada. His current research interests include wireless communication theory, wireless networks, optical wireless communications, and quantum communications. Dr. Cheng has served as a member of technical program committee for many IEEE conferences and workshops. He co-chaired the 12th Canadian Workshop on Information Theory (CWIT 2011) in Kelowna, Canada. In 2012, he chaired the 2012 Wireless Communications in Banff, Canada.  Dr. Cheng also chaired the sixth IEEE Optical Wireless Communications Symposium at the 2015 IEEE Global Communications Conference. He now volunteers as an Associate Editor for IEEE Transactions on Communications, IEEE Transactions on Wireless Communications, IEEE Communications Letters, and IEEE Access, and was a past Guest Editor for a special issue of IEEE Journal on Selected Areas in Communications on optical wireless communications. Currently, he serves as the President of the Canadian Society of Information Theory.