瑞典林雪平大学Christopher Mollén学术报告

来源:信息科学与技术学院  作者:马征  日期:2017-07-20  点击数:405

西南交通大学创源大讲堂

Innovative Source Lecture Hall, Southwest Jiaotong University

无线通信与信息编码前沿系列讲座

Lecture Series: Frontiers in Wireless Communications & Information Coding

 

报告题目(Title):  Massive MIMO with Low-Precision ADCs: A Performance Analysis

报告专家(Speaker):   Christopher Mollén, Linkoping University, Sweden

报告时间(Time)201782日,周下午4:00-5:00pm

报告地点(Venue)西南交通大学犀浦校区9号楼X9521#会议室

主持人(Chair):  马征(MA Zheng)

 

内容提要Outline of the Talk:A challenge in the implementation of massive MIMO technology is the large amount of hardware needed to build the base stations – each of the hundreds of antennae has to be equipped with its own transceiver chain.  The analogue-to-digital converter (ADC) is one component of the base station, whose total complexity, cost and power consumption scale linearly with the number of antennae.  This makes traditional ADCs, which commonly have more than 12 bits of precision, impractical in massive MIMO.  One way to reduce the hardware complexity and power consumption of the receiver chain is to use ADCs with lower precision.  Through an information-theoretic analysis of the effects of low-precision ADCs, an achievable rate is derived that takes the resulting quantization of both the data and pilots used for channel estimation into account.  The analysis shows that low-precision ADCs can be used to overcome the impracticality issue of the analogue-to-digital conversion in massive MIMO.  ADCs with as low as 3-bit precision can be used without significant performance loss at spectral efficiencies around 3.5 bpcu per user, also under interference from stronger transmitters, with some imperfections in the automatic gain control, and with estimated channel state information.


  

报告人简介(Short Biography of the Speaker): Christopher Mollén received the civilingenjör (M.Sc. 碩士) degree in 2013 and the teknologie licentiat (Licentiate of Engineering 副博) degree in 2016 from Linköping University, Sweden, where he is currently pursuing the teknologie doktor (Ph.D. 整博) degree with the Department of Electrical Engineering, Division for Communication Systems. Prior to his Ph.D. studies, he has worked as intern at Ericsson in Kista, Sweden, and in Shanghai, China. From 2011 to 2012, he studied at the Eidgenössische Technische Hochschule (ETH) Zürich, Switzerland, as an exchange student in the Erasmus Programme. From 2015 to 2016, he visited the University of Texas at Austin as a Fulbright Scholar. His research interest is low-complexity hardware implementations of massive MIMO base stations, including low-PAR precoding, low-resolution ADCs, and nonlinear amplifiers.