Clearing 2021
People

Dr Zilong Liu

Lecturer
School of Computer Science and Electronic Engineering (CSEE)
Dr Zilong Liu
  • Email

  • Telephone

    +44 (0) 1206 874085

  • Location

    1NW.4.12, Colchester Campus

  • Academic support hours

    Thursday, 2-3pm. Zoom ID: 936 2953 7953. I would be very grateful if you could drop me an email before we meet.

Profile

Biography

Welcome to my Essex page. (More details of my research: https://sites.google.com/site/zilongliu2357.) I am always looking for highly motivated students, visitors, and collaborators. Please don't hesitate to drop me an email if you are interested in my research. If you have obtained (or close to) a PhD and wish to work with me as a postdoc researcher, there are a number of excellent Fellowships that we may explore together: Newton International Fellowships (2 years, THE ROYAL SOCIETY), Research Fellowships in Science and Engineering from the Royal Commission for the Exhibition of 1851 (3 years), Leverhume Trust Early Career Fellowship (3 years), EPSRC Postdoctoral Fellowships (3 years), Ernest Rutherford Fellowship (5 years), Rutherford International Fellowship Programme (2 years), and ERC Marie Curie Actions (2 years). My research lies in the interplay of coding, signal processing, and communications, with a major objective of bridging theory and practice as much as possible. I am extremely interested in attacking research problems that arise in practical communication and/or signal processing scenarios. Recently, I have developed an interest in applying AI and machine learning for enhanced communications and networking. From January 2018 to November 2019, I was a Senior Research Fellow at the Institute for Communication Systems (ICS), Home of the 5G Innovation Centre (5GIC), University of Surrey, focusing on air-interface design of 5G networks and beyond (e.g., machine-type communications, URLLC, 5G NR, V2X, NOMA). Prior to my career in UK, I spent 9.5 years in the School of Electrical and Electronic Engineering, Nanyang Technological University (NTU), Singapore, first as a Research Associate (Jul. 2008 to Oct. 2014) and then a Research Fellow (November 2014 to Dec. 2018). During my work in NTU, I participated in a number of advanced projects on design and prototyping of ultra-reliable communication systems. I received my PhD from NTU in June 2014 with a thesis entitled ``Perfect- and Quasi- Complementary Sequences" , advised by Prof Guan Yong Liang. My PhD thesis, focusing on the fundamental limits, algebraic constructions, and applications of complementary sequences in wireless communications, has settled a few long-standing open problems in the field. I was a Visiting PhD student to University of Melbourne (May 2012 to Feb. 2013, hosted by Prof Udaya Parampalli) and Hong Kong University of Science and Technology (Jun 2013 to Jul. 2013, hosted by Prof Wai Ho Mow). I received my MSc Degree from Department of Electronic Engineering, Tsinghua University, Beijing, China, in Jul. 2007, with a thesis entitled "The Multistage Decoding Technique for DRM Receiver", advised by Prof Huazhong Yang. Trained to become a Digital IC Design Engineer, I played with communication system simulation and ASIC implementation during the MSc period. In Jun. 2004, I received Bachelor Degree from School of Information and Electronic Engineering, Huazhong University of Science and Technology, Wuhan, China. I am an IEEE Senior Member and an Associate Editor of IEEE Wireless Communications Letters, IEEE Access, Frontiers in Communications and Networks, and Frontiers in Signal Processing. Flexible, passionate, and determined, I am very open to engage with you to push forward the exciting forefront of the communication research.

Qualifications

  • PhD Nanyang Technological University (Singapore), (2014)

  • Master Degree Tsinghua University, (2007)

  • Bachelor Degree Huazhong University of Science and Technology, (2004)

Appointments

Other academic

  • Lecturer (Assistant Professor), School of CSEE, University of Essex (2/12/2019 - present)

  • Senior Research Fellow, 5G Innovation Centre, University of Surrey (5/1/2018 - 30/11/2019)

  • Research Fellow, School of EEE, Nanyang Technological University (1/11/2014 - 4/12/2018)

  • Research Associate, School of EEE, Nanyang Technological University (15/7/2008 - 31/10/2014)

Research and professional activities

Research interests

Error Correcting Codes (e.g., LDPC, Polar, Turbo, RS/BCH)

Signal Design (e.g., sequences/codebooks/waveforms) for Wireless Communications

Bayesian Inference & Iterative Receiver Design

Machine Learning for Communication Systems

Ultra-Reliable Low-Latency Communications (URLLC) for 5G and Beyond

Hardware Prototyping/Implementation of Wireless Communication Systems

Code-Domain Non-Orthogonal Multiple Access (NOMA) for Massive Connectivity

For example, sparse-code multiple access (SCMA) and traditional CDMA based overloaded multiuser systems.

Continuous Phase Modulation (CPM)

Research Allocation in Wireless Networks

Compressed Sensing for Communications

V2X Communications and Networks

DNA Coded Storage

ASIC Design of Communication and Signal Processing Algorithms

Teaching and supervision

Current teaching responsibilities

  • Telecommunication Principles (CE330)

  • Theory of Signals and Communication Systems (CE701)

  • Team Project Challenge (CS) (CE291)

  • Team Project Challenge (WBL) (CE299)

Publications

Journal articles (38)

Lu, W., Si, P., Lu, F., Li, B., Liu, Z., Hu, S. and Gong, Y., (2021). Resource and trajectory optimization in UAV-powered wireless communication system. Science China Information Sciences. 64 (4)

Bagheri, H., Noor-A-Rahim, M., Liu, Z., Lee, H., Pesch, D., Moessner, K. and Xiao, P., (2021). 5G NR-V2X: Toward Connected and Cooperative Autonomous Driving. IEEE Communications Standards Magazine. 5 (1), 48-54

Chu, Z., Hao, W., Xiao, P., Mi, D., Liu, Z., Khalily, M., Kelly, JR. and Feresidis, AP., (2021). Secrecy Rate Optimization for Intelligent Reflecting Surface Assisted MIMO System. IEEE Transactions on Information Forensics and Security. 16, 1655-1669

Qian, L., Yang, P., Guan, YL., Liu, Z., Xiao, Y., Jiang, K. and Xiao, M., (2021). Multi-Dimensional Polarized Modulation for Land Mobile Satellite Communications. IEEE Transactions on Cognitive Communications and Networking. 7 (2), 383-397

Wu, S-W., Chen, C-Y. and Liu, Z., (2021). How to Construct Mutually Orthogonal Complementary Sets With Non-Power-of-Two Lengths?. IEEE Transactions on Information Theory. 67 (6), 3464-3472

Yu, L., Liu, Z., Wen, M., Cai, D., Dang, S., Wang, Y. and Xiao, P., (2021). Sparse Code Multiple Access for 6G Wireless Communication Networks: Recent Advances and Future Directions. IEEE Communications Standards Magazine. 5 (2), 92-99

Singh, G., Srivastava, A., Bohara, VA. and Liu, Z., (2021). Downlink Performance of Optical Power Domain NOMA for Beyond 5G Enabled V2X Networks. IEEE Open Journal of Vehicular Technology. 2, 235-248

Luo, Q., Gao, P., Liu, Z., Xiao, L., Mheich, Z., Xiao, P. and Maaref, A., (2021). An Error Rate Comparison of Power Domain Non-orthogonal Multiple Access and Sparse Code Multiple Access. IEEE Open Journal of the Communications Society. 2, 500-511

Sarkar, P., Majhi, S. and Liu, Z., (2021). Pseudo-Boolean Functions for Optimal Z-Complementary Code Sets with Flexible Lengths. IEEE Signal Processing Letters. 28, 1350-1354

Deng, L., Liu, Z., Guan, YL., Liu, X., Aslam, CA., Yu, X. and Shi, Z., (2021). Perturbed Adaptive Belief Propagation Decoding for High-Density Parity-Check Codes. IEEE Transactions on Communications. 69 (4), 2065-2079

Liu, Z. and Yang, L-L., (2021). Sparse or Dense: A Comparative Study of Code-Domain NOMA Systems. IEEE Transactions on Wireless Communications. 20 (8), 4768-4780

Wu, W., Hu, S., Lin, D. and Liu, Z., (2021). DSLN: Securing Internet of Things Through RF Fingerprint Recognition in Low-SNR Settings. IEEE Internet of Things Journal, 1-1

Adhikary, AR., Majhi, S., Liu, Z. and Guan, YL., (2020). New Sets of Optimal Odd-Length Binary Z-Complementary Pairs. IEEE Transactions on Information Theory. 66 (1), 669-678

Xiao, L., Xiao, P., Liu, Z., Yu, W., Haas, H. and Hanzo, L., (2020). A Compressive Sensing Assisted Massive SM-VBLAST System: Error Probability and Capacity Analysis. IEEE Transactions on Wireless Communications. 19 (3), 1990-2005

Jiang, K., Liu, Z., Yang, P., Xiao, Y. and Li, S., (2020). An Experimental Investigation of Enhanced SM-OFDM Over Indoor Rician Multipath Channels. IEEE Transactions on Vehicular Technology. 69 (2), 2291-2295

Anand, K., Guan, YL., Liu, X., Liu, Z., Yang, Y., Zhou, Z., Fan, P. and Gunawan, E., (2020). Pilot Design for Enhanced Channel Estimation in Doubly Selective Channels. IEEE Transactions on Vehicular Technology. 69 (2), 1679-1694

Liu, Z., Yang, P., Guan, YL. and Xiao, P., (2020). Cross Z-Complementary Pairs for Optimal Training in Spatial Modulation Over Frequency Selective Channels. IEEE Transactions on Signal Processing. 68, 1529-1543

Zhou, Y., Zhou, Z., Liu, Z., Fan, P. and Guan, YL., (2020). Low-PMEPR Preamble Sequence Design for Dynamic Spectrum Allocation in OFDMA Systems. IEEE Transactions on Communications. 68 (5), 2922-2933

Lu, W., Si, P., Liu, X., Li, B., Liu, Z., Zhao, N. and Wu, Y., (2020). OFDM based bidirectional multi-relay SWIPT strategy for 6G IoT networks. China Communications. 17 (12), 80-91

Noor-A-Rahim, M., Liu, Z., Guan, YL. and Hanzo, L., (2020). Finite-Length Performance Analysis of LDPC Coded Continuous Phase Modulation. IEEE Transactions on Vehicular Technology. 69 (10), 12277-12280

Sarkar, P., Majhi, S. and Liu, Z., (2020). A Direct and Generalized Construction of Polyphase Complementary Sets With Low PMEPR and High Code-Rate for OFDM System. IEEE Transactions on Communications. 68 (10), 6245-6262

Mheich, Z., Liu, Z., Xiao, P. and Maaref, A., (2020). Delayed Bit Interleaved Coded Sparse Code Multiple Access. IEEE Transactions on Vehicular Technology. 69 (7), 8018-8022

Noor-A-Rahim, M., Liu, Z., Lee, H., Ali, GGMN., Pesch, D. and Xiao, P., (2020). A Survey on Resource Allocation in Vehicular Networks. IEEE Transactions on Intelligent Transportation Systems, 1-21

Wen, J., Zhou, Z., Liu, Z., Lai, M-J. and Tang, X., (2019). Sharp sufficient conditions for stable recovery of block sparse signals by block orthogonal matching pursuit. Applied and Computational Harmonic Analysis. 47 (3), 948-974

Liu, Z., Xiao, P. and Hu, S., (2019). Low-PAPR Preamble Design for FBMC systems. IEEE Transactions on Vehicular Technology. 68 (8), 7869-7876

Das, S., Majhi, S., Budisin, S. and Liu, Z., (2019). A New Construction Framework for Polyphase Complete Complementary Codes With Various Lengths. IEEE Transactions on Signal Processing. 67 (10), 2639-2648

Sarkar, P., Majhi, S. and Liu, Z., (2019). Optimal Z -Complementary Code Set From Generalized Reed-Muller Codes. IEEE Transactions on Communications. 67 (3), 1783-1796

Liu, Z., Guan, YL., Parampalli, U. and Hu, S., (2018). Spectrally-Constrained Sequences: Bounds and Constructions. IEEE Transactions on Information Theory. 64 (4), 2571-2582

Liu, Z., Guan, YL. and Chui, C-C., (2018). CPM Training Waveforms With Autocorrelation Sidelobes Close to Zero. IEEE Transactions on Vehicular Technology. 67 (11), 11269-11273

Das, S., Budisin, S., Majhi, S., Liu, Z. and Guan, YL., (2018). A Multiplier-Free Generator for Polyphase Complete Complementary Codes. IEEE Transactions on Signal Processing. 66 (5), 1184-1196

Liu, Z., Guan, YL. and Mow, WH., (2017). Asymptotically Locally Optimal Weight Vector Design for a Tighter Correlation Lower Bound of Quasi-Complementary Sequence Sets. IEEE Transactions on Signal Processing. 65 (12), 3107-3119

Hu, S., Liu, Z., Guan, YL., Jin, C., Huang, Y. and Wu, J-M., (2017). Training Sequence Design for Efficient Channel Estimation in MIMO-FBMC Systems. IEEE Access. 5, 4747-4758

Yang, P., Xiao, Y., Guan, YL., Hari, KVS., Chockalingam, A., Sugiura, S., Haas, H., Di Renzo, M., Masouros, C., Liu, Z., Xiao, L., Li, S. and Hanzo, L., (2016). Single-Carrier SM-MIMO: A Promising Design for Broadband Large-Scale Antenna Systems. IEEE Communications Surveys & Tutorials. 18 (3), 1687-1716

Liu, Z., Guan, YL. and Chen, H-H., (2015). Fractional-Delay-Resilient Receiver Design for Interference-Free MC-CDMA Communications Based on Complete Complementary Codes. IEEE Transactions on Wireless Communications. 14 (3), 1226-1236

Liu, Z., Guan, YL. and Mow, WH., (2014). A Tighter Correlation Lower Bound for Quasi-Complementary Sequence Sets. IEEE Transactions on Information Theory. 60 (1), 388-396

Liu, Z., Parampalli, U., Guan, YL. and Boztas, S., (2014). A New Weight Vector for a Tighter Levenshtein Bound on Aperiodic Correlation. IEEE Transactions on Information Theory. 60 (2), 1356-1366

Liu, Z., Parampalli, U. and Guan, YL., (2014). Optimal Odd-Length Binary Z-Complementary Pairs. IEEE Transactions on Information Theory. 60 (9), 5768-5781

Liu, Z., Parampalli, U., Guan, YL. and Boztas, S., (2013). Constructions of Optimal and Near-Optimal Quasi-Complementary Sequence Sets from Singer Difference Sets. IEEE Wireless Communications Letters. 2 (5), 487-490

Conferences (6)

Singh, G., Srivastava, A., Bohara, V. and Liu, Z., Comparison of PD-NOMA for RF and VLC based Vehicular Communication under Various Weather Conditions

Mheich, Z., Hemadeh, IA., Liu, Z. and Xiao, P., (2020). Low-Complexity Expectation Propagation Detection for Uplink MIMO-SCMA Systems

Chen, H., Mi, D., Liu, Z., Xiao, P. and Tafazolli, R., (2020). Rate-Splitting for Overloaded Multigroup Multicast: Error Performance Evaluation

Liu, Z., Yang, P., Guan, YL. and Xiao, P., (2020). Cross Z-Complementary Pairs (CZCPs) for Optimal Training in Broadband Spatial Modulation Systems

Das, S., Parampalli, U., Majhi, S., Liu, Z. and Budisin, S., (2020). New Optimal $Z$-Complementary Code Sets Based on Generalized Paraunitary Matrices

Das, S., Parampalli, U., Majhi, S. and Liu, Z., (2019). Near-Optimal Zero Correlation Zone Sequence Sets from Paraunitary Matrices

Contact

zilong.liu@essex.ac.uk
+44 (0) 1206 874085

Location:

1NW.4.12, Colchester Campus

Academic support hours:

Thursday, 2-3pm. Zoom ID: 936 2953 7953. I would be very grateful if you could drop me an email before we meet.