Lingjia Liu's Webpage

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====== Lingjia Liu, Ph.D. ======

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{{:lingjia_liu.jpg?180 |Profile}}
\\
Lingjia Liu, Ph.D.\\
Associate Director, [[https://wireless.vt.edu/|Wireless@Virginia Tech]]\\
Associate Professor, [[https://ece.vt.edu/|Bradley Department of Electrical and Computer Engineering]]\\
[[https://eng.vt.edu/|College of Engineering]]\\
[[https://vt.edu/|Virginia Tech]], Blacksburg, VA, USA\\
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439 Durham Hall\\
1145 Perry Street, Blacksburg, VA, USA\\
Phone: (540) 231-7243\\
Email: ljliu AT vt dot edu\\
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===== Research Interests: =====

  * Enabling technologies for 5G networks 
    * 3D massive/FD-MIMO systems
    * Cooperative routing and multi-user scheduling
    * Cloud-RAN (CRAN) and interference alignment
    * Ultra-low latency communications

  * Deep learning and its application to communication networks 
    * Big data driven communications and networking
    * Reservoir computing for communication systems
    * Demand and response for smart grid networks
    * Attack detection in smart grid networks 

  * Network of everything
    * Device-to-device (D2D) & machine-type-communications (MTC)
    * Privacy/security protection for cyber-physical systems (CPS)
    * Spectrum sensing & dynamic spectrum access (DSA)
    * Energy-harvesting for internet of things (IoT)

===== Short Bio: =====
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Lingjia Liu received the Bachelor of Science (B.S.) degree with the highest honor in Electronic Engineering Department from [[http://www.sjtu.edu.cn|Shanghai Jiao Tong University]], Shanghai, China, and completed his Doctor of Philosophy (Ph.D.) degree at [[http://www.tamu.edu|Texas A&M University]] in Electrical and Computer Engineering. He spent the summer of 2007 and spring of 2008 in the [[http://www.merl.com|Mitsubishi Electric Research Laboratory]]. Prior to joining the [[https://ece.vt.edu/|ECE Department]] at Virginia Tech (VT), he was an Associate Professor in the [[http://www.eecs.ku.edu/|EECS Department]] at the University of Kansas (KU). He spent 3+ years working in the [[http://www.sra.samsung.com/research/standards-and-5g-mobility|Standards & Mobility Innovation Lab]] of Samsung Research America (SRA) where he got **Global Samsung Best Paper Award** twice (in 2008 and 2010 respectively). He was a technical leader and a leading **3GPP RAN1** standard delegate from Samsung on downlink MIMO, Coordinated Multipoint (CoMP) transmission/reception, device-to-device (D2D) communications, and Heterogeneous Networks (HetNets). He was elected as the **New Faces of Engineering 2011** by the Diversity Council of the National Engineers Week Foundation and was recognized during the //__2011 National Asian American Engineers of the Year Awards__// Banquet in Seattle ([[http://www.dallasnews.com/news/local-news/20110223-asian-culture-and-community-event-to-mark-uprising-in-taiwan.ece?ssimg=130712#ssStory130713|News Release in Dallas Morning News]]). From 2013 to 2017, he has been continuously selected as U.S. Air Force Office of Scientific Research (AFOSR)/Air Force Research Laboratory (AFRL) summer faculty fellow. In May 2015, he received the **Miller Professional Development Award for Distinguished Research** at KU.\\ 
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Lingjia Liu is a member of the Phi Kappa Phi honor society and a senior member of //IEEE//. He is currently serving as an **Associate Editor** of the **//IEEE Transactions on Neural Networks and Learning Systems//** as well as the //EURASIP Journal on Wireless Communications and Networking//. He was an Editor of //IEEE Transactions on Wireless Communications// (TWireless) from 2012 to 2017, an Editor of the //IEEE Transactions on Communications// (TCom) from 2015 to 2017. He has been serving as the Technical Program Committee Chair of 7 consecutive //IEEE// GLOBECOM Workshops on Emerging Technologies for 5G ('12-'18). He served as the Vice-Chair, Americas of the //IEEE// Technical Committee on Green Communications & Computing (TCGCC) from 2017 to 2019. Currently, he is an Elected Member of [[https://www.nationalspectrumconsortium.org/about-us-2/leadership/|Executive Committee]] of [[https://www.nationalspectrumconsortium.org/|National Spectrum Consortium]] and an Elected Member of the //IEEE// Signal Processing Society SPCOM Technical Committee.\\ 
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Lingjia Liu has 200+ publications including 3 book chapters, 80+ journal publications, 5 editorials, and 90+ conference papers. He has numerous technical contributions to major 4G standards including both 3GPP LTE/LTE-Advanced and //IEEE 802.16m//. He has 20+ granted U.S. patents with 20+ pending applications, and **10+ essential intellectual property rights (IPRs)** in major 4G standards. His research receives including **8 Best Paper Awards** (2020 Charles K. Kao Best Paper Award, 2018 //IEEE// TAOS Best Paper Award, 2016 //IEEE// GLOBECOM Best Paper Award, etc). Currently, his research is sponsored by [[http://www.wpafb.af.mil/afrl/ri/|Air Force Research Laboratory]], [[http://www.wpafb.af.mil/afrl/afosr/|Air Force Office of Scientific Research]], [[https://www.intel.com/content/www/us/en/research/overview.html|Intel]], [[http://nsf.gov|National Science Foundation]], [[https://www.nationalspectrumconsortium.org/|National Spectrum Consortium]], [[https://www.qualcomm.com/|Qualcomm]], and [[http://www.sra.samsung.com/research/standards-and-5g-mobility|Samsung Research America]]. His research efforts have been supported in part by over **$80 M** in research funding, with Lingjia Liu serving as the **principal investigator (PI)** on over **$8 M** federal research grants (personal share **$5.5+ M**).
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===== What's New: =====
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**Available positions**: research assistant positions are available for self-motivated Ph.D. students who are interested in conducting research on the topic of machine learning and neural networks for wireless networks (**[[Openings|click for details]]**).\\
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**<fc #6495ed>[New Member]</fc>** __January 10, 2021__: Yifei joined our group as a PhD student. Welcome on board!\\
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**<fc #6495ed>[Paper Acceptance]</fc>** __January 6, 2021__: Our paper, //A Deep Reinforcement Learning Framework for Spectrum Management in Dynamic Spectrum Access//, has been accepted to //IEEE Internet Things J.// (**IOTJ**) Congratulations Antonio!\\
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**<fc #6495ed>[Paper Acceptance]</fc>** __January 4, 2021__: Our paper, //RCNet: Incorporating Structural Information into Deep RNN for Online MIMO-OFDM Symbol Detection with Limited Training//, has been accepted to //IEEE Trans. Wireless Commun.// (**TWireless**). Congratulations Zhou and Shashank!\\
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**<fc #6495ed>[Paper Acceptance]</fc>** __December 14, 2020__: Our paper, //Energy Efficient MIMO-OFDM Spectrum Sensing Using Deep Stacked Spiking Delayed Feedback Reservoir Computing//, has been accepted to //IEEE Trans. Green Commun. and Netw.// (**TGCN**). Congratulations Kian!\\
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**<fc #ff0000>[Grant]</fc>** __December 14, 2020__: "Open Programmable Secure 5G (OPS-5G)" has been awarded by DARPA. Perspecta Labs is leading the effort. Dr. Lingjia Liu is serving as the **Co-PI** of the subcontract from Virginia Tech (Dr. Haining Wang is serving as the PI). VT's share is **$457,659**.\\
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**<fc #6495ed>[M.S. Defense]</fc>** __December 10, 2020__: Our group member, Jianan Bai, successfully defended his M.S. thesis. Congratulations Jianan! \\
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**<fc #6495ed>[Paper Acceptance]</fc>** __December 4, 2020__: Our paper, //Enhanced Flooding-Based Routing Protocol for Swarm UAV Networks: Random Network Coding Meets Clustering//, has been accepted to //IEEE// **INFOCOM 2021**. Congratulations Antonio and Bodong!\\
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**<fc #6495ed>[Paper Acceptance]</fc>** __November 28, 2020__: Our paper, //A Cost-Efficient Digital ESN Architecture on FPGA for OFDM Symbol Detection//, has been accepted to //ACM Journal on Emerging Technologies in Computing Systems// (**JETC**). Congratulations Donald and Lianjun!\\
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**<fc #ff0000>[Grant]</fc>** __November 17, 2020__: "Agile Waveform Design for Communication Networks in Contested Environments" has been awarded as a University Center of Excellence (UCoE) by AFRL/AFOSR. [[https://ece.duke.edu/faculty/robert-calderbank|Dr. Robert Calderbank]] is the leading PI and Duke University is the leading institution. The UCoE will have 8 researchers from Duke, ASU, CMU, CSU, Princeton, and Virginia Tech. Dr. Lingjia Liu is serving as the **PI** from the Virginia Tech and will be serving on the **Steering Committee** of the UCoE. VT's share is **$1,181,001**. News release from Duke can be found [[https://pratt.duke.edu/about/news/afosr-coe|here]].\\
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**<fc #ff0000>[Grant]</fc>** __November 17, 2020__: "5G Enabled Smart Farms through Secure and Intelligent Wireless Sensors" has been awarded by Commonwealth Cyber Initiative (CCI) under Southwest Virginia Research, Innovation, & Workforce Development Program. Dr. Lingjia Liu is serving as the Co-PI of this project and Dr. Hwajung (Joan) Lee from Radford University is serving as the PI of the project.\\
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**<fc #6495ed>[Paper Acceptance]</fc>** __November 13, 2020__: Our paper, //A Cross-Layer Optimization Framework for Distributed Computing in IoT Networks//, has been accepted to //ACM/IEEE Symposium on Edge Computing EdgeComm Workshop//. Congratulations Bodong!\\
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**<fc #6495ed>[Paper Acceptance]</fc>** __November 13, 2020__: Our paper, //Quantized Reservoir Computing on Edge Devices for Communication Applications//, has been accepted to //ACM/IEEE Symposium on Edge Computing EdgeComm Workshop//. C\\
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**<fc #6495ed>[Paper Acceptance]</fc>** __November 3, 2020__: Our paper, //Learning with Knowledge of Structure: A Neural Network-Based Approach for MIMO-OFDM Detection//, has been accepted to //Asilomar 2021//. Congratulations Zhou and Shashank!\\
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**<fc #6495ed>[Paper Acceptance]</fc>** __November 3, 2020__: Our paper, //Learning for Integer-Constrained Optimization through Neural Networks with Limited Training//, has been accepted to //NeurIPS Learning Meets Combinatorial Algorithms (LMCA) Workshop//. Congratulations Zhou and Shashank!\\
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**<fc #ff0000>[ExComm of NSC]</fc>** __October 5, 2020__: Dr. Lingjia Liu has been elected to the [[https://www.nationalspectrumconsortium.org/about-us-2/leadership/|Executive Committee]] of [[https://www.nationalspectrumconsortium.org/|National Spectrum Consortium]]! \\
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**<fc #6495ed>[Paper Acceptance]</fc>** __September 24, 2020__: Our paper, //Deep Echo State Q-Network (DEQN) and Its Application in Dynamic Spectrum Sharing for 5G and Beyond//, has been accepted to //IEEE Trans. Neural Netw. & Learning Syst.// (**TNNLS**) Congratulations Hao-Hsuan!\\
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**<fc #6495ed>[Qualcomm Academic Lecture]</fc>** __September 16, 2020__: Dr. Lingjia Liu delivered an invited Academic Lecture to Qualcomm on the title of "Brain-Inspired Wireless Communications: Reservoir Computing Meets MIMO-OFDM"!\\
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**<fc #ff0000>[Qualcomm Innovation Fellowship]</fc>** __August 28, 2020__: Donald and Kangjun have been selected to received the prestigious [[https://www.qualcomm.com/invention/research/university-relations/innovation-fellowship/2020-north-america|Qualcomm Innovation Fellowship (QIF)]] with a grant of **$100K**. Congratulations Donald and Kangjun!\\
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**<fc #6495ed>[Paper Acceptance]</fc>** __August 26, 2020__: Our paper, //Random Network Coding Enabled Routing Protocol in Unmanned Aerial Vehicle Networks//, has been accepted to //IEEE Trans. Wireless Commun.// (**TWireless**) Congratulations Antonio!\\
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**<fc #6495ed>[New Member]</fc>** __August 10, 2020__: Nima and Jiarui joined our group as PhD students. Welcome on board!\\
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**<fc #6495ed>[Paper Acceptance]</fc>** __August 04, 2020__: Our paper, //Spatial Spectrum Sensing in Uplink Two-Tier User-Centric Deployed HetNets//, has been accepted to //IEEE Trans. Wireless Commun.// (**TWireless**) Congratulations Bodong!\\
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**<fc #6495ed>[Paper Acceptance]</fc>** __July 24, 2020__: Our paper, //On the Fundamental Tradeoffs between Video Freshness and Video Quality in Real-time Applications//, has been accepted to //IEEE Internet Things J.// (**IOTJ**) Congratulations Junchao and Antonio!\\
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**<fc #6495ed>[EdgeComm]</fc>** __June 21, 2020__: Dr. Lingjia Liu will be serving as the Workshop co-Chair of the 1st International Workshop on Edge Computing and Communications (EdgeComm), in conjunction with the 5th ACM/IEEE Symposium on Edge Computing (SEC 2020). The webpage of the workshop can be found [[https://acm-ieee-sec.org/2020/edgecom.php|here]]. Please consider submitting your contributions!\\
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**<fc #6495ed>[Visitor Return]</fc>** __June 4, 2020__: Nan Qu finished her visit in our group and returned back to China. All the best to Nan!\\
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**<fc #ff0000>[Grant]</fc>** __May 26, 2020__:  "Collaborative Research: MLWiNS: Deep Neural Networks Meet Physical Layer Communications – Learning with Knowledge of Structure" has been awarded by the National Science Foundation (NSF) and Intel under grant NSF/CNS-2003059. This is a medium collaborative project with a total budget of **$810K**. Dr. Lingjia Liu is serving as the **PI** from the **leading institution** of this project. [[https://lizhongzheng.mit.edu/|Dr. Lizhong Zheng]] from [[https://www.eecs.mit.edu/|EECS@MIT]] is serving as the PI from the collaborative institution.\\
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**<fc #6495ed>[Paper Acceptance]</fc>** __May 19, 2020__: Our paper, //MIMO Spectrum Sensing for Cognitive Radio-Based Internet of Things//, has been accepted to //IEEE Internet Things J.// (**IOTJ**) Congratulations Mingqian!\\
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**<fc #6495ed>[Summer Intern]</fc>** __May 18, 2020__: Our group members, Lianjun Li, Hao (Antonio) Song, and Zhou Zhou will start their research intern positions in Samsung Research America and Mitsubishi Electric Research Lab. Wish them a nice and productive summer of 2020.\\
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**<fc #ff0000>[Grant]</fc>** __May 15, 2020__:  "Preliminary Research and Multi-University Proposal Development for Efficient Measurement of Spectrum Sharing and Cognitive Radio Network Intelligence and Performance" has been awarded by Commonwealth Cyber Initiative (CCI) under Southwest Virginia Collaboration Grant. Dr. Lingjia Liu is serving as the Co-PI of this project and Dr. Carl Dietrich is serving as the PI of the project.\\
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**<fc #6495ed>[Paper Acceptance]</fc>** __May 14, 2020__: Our paper, //3D Spectrum Sharing for Hybrid D2D and UAV Networks//, has been accepted to //IEEE Trans. Commun.// (**TCOM**) Congratulations Bodong!\\
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**<fc #ff0000>[Ph.D. Defense]</fc>** __May 12, 2020__: Our group member, Kian Hamedani, successfully defended his Ph.D. dissertation and become Dr. Hamedani. Congratulations Dr. Hamedani! The title of Kian's dissertation is "Energy Efficient Deep Spiking Recurrent Neural Networks: A Reservoir Computing-Based Approach". He is the <fc #ff0000>**8th**</fc> Ph.D. graduated from our group.\\
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**<fc #ff0000>[Best Paper Award]</fc>** __May 2, 2020__: Our paper, //Reservoir Computing Meets Wi-Fi in Software Radios: Neural Network-based Symbol Detection using Training Sequences and Pilots//, received **Charles K. Kao Best Paper Award** at //The 29th Wireless and Optical Communications Conference// (WOCC 2020). This is a joint collaboration among our group, Samsung Research America, and Air Force Research Laboratory. Congratulations Lianjun!\\
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**<fc #ff0000>[Grant]</fc>** __May 1, 2020__: Our group received **$80K** support to work on //AI-Enabled Wireless: From Receive Processing to Multi-user Scheduling// from Samsung Research America (SRA)! Dr. Lingjia Liu is serving as the sole PI of this project.\\
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**<fc #6495ed>[Paper Acceptance]</fc>** __April 20, 2020__: Our paper, //Moving Toward Intelligence: Detecting Symbols on 5G Systems Through Deep Echo State Network//, has been accepted to //IEEE Trans. Emerg. Sel. Topics Circuits Syst// (**ETCAS**) Congratulations Kangjun, Zhou, and Shashank!\\
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**<fc #6495ed>[Paper Acceptance]</fc>** __March 30, 2020__: Our paper, //Accelerating Model Free Reinforcement Learning with Imperfect Model Knowledge in Dynamic Spectrum Access//, has been accepted to //IEEE Internet Things J.// (**IOTJ**) Congratulations Lianjun, Jianan, and Hao-Hsuan!\\
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**<fc #6495ed>[Qualcomm Innovation Fellowship]</fc>** __March 27, 2020__: Donald and Kangjun's abstract on "A Low-Power Hybrid Neural Processing Architecture for Mobile Edge Itelligent Computing" has been selected as the <fc #ff0000>**Finalist**</fc> for Qualcomm Innovation Fellowship (QIF). Congratulations Donald and Kangjun!\\
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**<fc #6495ed>[Paper Acceptance]</fc>** __March 27, 2020__: Our paper, //Mobile Edge Computing in the Sky: A Hybrid Air and Ground Network//, has been accepted to //IEEE Internet Things J.// (**IOTJ**) Congratulations Bodong!\\
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**<fc #6495ed>[Paper Acceptance]</fc>** __March 4, 2020__: Our paper, //Scalable Video Transmission in Cache-aided Device-to-Device Networks//, has been accepted to //IEEE Trans. Wireless Commun.// (**TWireless**) Congratulations Junchao, Antonio, Rubayet and Bodong!\\
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**<fc #6495ed>[Paper Acceptance]</fc>** __March 3, 2020__: Our paper, //Spectrum Sharing for UAV Communications: Spatial Spectrum Sensing and Open Issues//, has been accepted to //IEEE Veh. Technol. Mag.// (**VTM**) Congratulations Bodong!\\
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More news can be found [[News|HERE]].

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