Cong

Cong Ling    cong

Communications and Signal Processing Group
Department of Electrical and Electronic Engineering
Imperial College London
South Kensington Campus
London SW7 2AZ,  United Kingdom

Office: 815
Tel: +44 (0)20 759-46214
Fax: +44 (0)20 759-46302
Email: c.ling (at) imperial.ac.uk

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Biography
Cong Ling is currently a Senior Lecturer (equivalent to Associate Professor) in the Electrical and Electronic Engineering Department at Imperial College London. He received the Bachelor and Master degrees from Nanjing Institute of Communications Engineering, China in 1995 and 1997 respectively, and the Ph.D. degree from Nanyang Technological University, Singapore in 2005. Before joining Imperial College, he had been on the faculties of Nanjing Institute of Communications Engineering and King’s College. He visited Hong Kong University of Science and Technology as a Hong Kong Telecom Institute of Information Technology (HKTIIT) Fellow in 2009.

Dr. Ling is an Associate Editor of IEEE Transactions on Communications and IEEE Transactions on Vehicular Technology. He has also served on the program committees of several international conferences including IEEE Information Theory Workshop (2006, 2009), Globecom, and ICC. He is a member of IEEE. 

 

Research
Dr. Ling's research is focused on coding and information theory, with applications to various areas of wireless communications, networks and signal processing. Particular interests are

·         Network information theory and coding (including multi-terminal, cooperative communication)

·         Lattice methods for coding and security/cryptography (including codes and algorithms)

·         Distributed signal processing, compressive sensing and random matrix theory

·         MIMO and MIMO-OFDM communication

·         Coding (turbo, LDPC and polar codes), iterative decoding

·         Noncoherent and differential communication

·         Spread spectrum, CDMA and multi-user communication

 

Past and current research projects include (either as PI or CI)

 

·         Adaptive compressed sensing for wideband dynamic signals, UK MoD UDRC, 2011-2013

·         LACONIC: Lattice Coding for Multiuser Wireless Communications, European Commission FP7, 2011-2013

·         Lattice reduction for distributed multi-input multi-output communications, Royal Society of UK, 2011-2013

·         Enabling Flexible Networks: Network Coding, Mobile VCE and EPSR of UK, 2008-2010

·         Space-time communication over multiuser fading channels, Singapore Millennium Foundation, 2002-2004.

·         Differential space-time communications over mobile fading channels, Jiangsu Province Science Foundation, China, 2001-2003

·         Iterative (Turbo) Receiver Structures for the Future Generation Mobile Communications, National Science Foundation of China, 2000-2003

·         Turbo reception at low SNR, National high-technology development (863) program, China, 2001-2003.

·         FPGA implementation of Turbo codec, Eastcom, China, 2000-2001

·         DSP implementation of chaotic secure communication, Private funder, China, 2000

·         Chaos-based frequency-hopping and direct-sequence spread-spectrum communication, National Laboratory of Communications Antijamming, Chengdu, China, 1999-2001

·         Key technologies for information security and protection, National Science Foundation of China, 2000-2003

 

News

 

·         Imperial College is recognised as an Academic Centre of Excellence in Cyber Security Research.

·         The Communications and Signal Processing Group hosts the University Defence Research Centre (UDRC) in Signal Processing, sponsored by the UK MoD.

·         Imperial College is a member of the Mobile Virtual Centre of Excellence (VCE).

 

 

Publications

IEEE Copyright notice: (C) 20XX IEEE. Personal use of this material is permitted.

New

1.    Kezhi Li, Lu Gan, and Cong Ling, “Semi-universal convolutional compressed sensing using (nearly) perfect sequences,” submitted.

2.     C. Ling, L. Luzzi, and J.-C. Belfiore, “Lattice codes achieving strong secrecy over the mod-L Gaussian channel,” submitted to ISIT 2012.

3.     J.-C. Belfiore and C. Ling, “The flatness factor in lattice network coding: Design criterion and decoding algorithm,” International Zurich Seminar on Communications 2012, invited paper.

4.     Cong Ling, Wai Ho Mow, and Nick Howgrave-Graham, “Reduced and fixed-complexity variants of the LLL algorithm for communications,” submitted.

5.      Cong Ling, Su Gao, and Jean-Claude Belfiore, Wyner-Ziv coding based on multi-dimensional nested lattices, IEEE Trans. Commun., to appear.

Journal Papers

1.    Shuiyin Liu, Cong Ling, and Damien Stehle, “Decoding by sampling: A randomized lattice algorithm for bounded-distance decoding,” IEEE Trans. Inform. Theory, vol. 57, pp. 5933-5945, Sept. 2011.

2.     Cong Ling, “On the proximity factors of lattice reduction-aided decoding,” IEEE Trans. Signal Processing, vol. 59, pp. 2795-2808, June 2011.

3.     Haishi Ning, Cong Ling, and Kin. K. Leung, “Feasibility condition for interference alignment with diversity,” IEEE Trans. Inform. Theory, vol. 57, pp. 2902-2912, May 2011..

4.     Haishi Ning, Cong Ling, and Kin. K. Leung, “Generalized sequential slotted amplify and forward strategy in cooperative communications,” IEEE Trans. Inform. Theory, vol. 57, pp. 1968-1974, Apr. 2011.

5.     L. Bai, C. Chen, J. Choi, and C. Ling, “Greedy user selection using a lattice reduction updating method for multiuser MIMO systems,” IEEE Trans. Vehicular Tech., vol. 60, pp. 136-147, Jan. 2011.

6.     Yifan Chen and Cong Ling, “Effect of correlated Nakagami-m fading on the e-outage channel capacity of the decentralized two-relay network” IEEE Trans. Wireless. Commun., vol. 9, pp. 3607-3612, Dec. 2010.

7.     Daniel Valderas, Cong Ling, and Pedro Crespo, “UWB portable printed monopole array design for MIMO communications,” Microwave and Optical Technology Letters, vol. 52, pp. 889-895, Apr. 2010.

8.     Cong Ling, Wai Ho Mow, and Lu Gan, “Dual-lattice algorithm and partial lattice reduction for SIC-based MIMO detection,” IEEE J. Sel. Topics on Signal Processing, vol. 3, pp. 975-985, Dec. 2009.

9.     Xiaofu Wu, Cong Ling, Ming Jiang, Enyang Xu, Chunming Zhao, and Xiaohu You, “New insights into weighted bit-flipping decoding Communications,” IEEE Trans. Commun., vol. 57, pp. 2177 – 2180, Aug. 2009.

10.  Ying Hung Gan, Cong Ling, and Wai Ho Mow, “Complex lattice reduction algorithm for low-complexity full-diversity MIMO detection,” IEEE Trans. Signal Processing, vol. 57, pp. 2701-2710, July 2009. MATLAB code for CLLL.

11.  Lu Gan and Cong Ling, “Computation of the Para-Pseudo Inverse for Oversampled Filter Banks: Forward and Backward Greville Formulas,” IEEE Trans. Signal Processing, vol. 56, pp. 5851 – 5860, Dec. 2008.

12.  Cong Ling and Xiaofu Wu, “A back-iteration method for reconstructing chaotic sequences in finite-precision machines,” Circuits, Syst., Signal Processing, vol. 27, pp. 883 – 891, Oct. 2008.

13.  Cong Ling, K. H. Li and A. C. Kot, “Performance of space-time codes: Gallager bounds and weight enumeration,” IEEE Trans. Inform. Theory, vol. 54, pp. 3592-3610, Aug. 2008.

14.  Cong Ling, Xiaofu Wu, K. H. Li, and A. C. Kot, “Gallager bounds for noncoherent decoders in fading channels,” IEEE Trans. Inform. Theory, vol. 53, pp. 4605-4614, Dec. 2007.

15.  Cong Ling, “Generalized union bound for space-time codes,” IEEE Trans. Commun., vol. 55, pp. 90-99, Jan. 2007.

16.  Xiaofu Wu, Haige Xiang and Cong Ling, “New Gallager bounds in block fading channels,” IEEE Trans. Inform. Theory, vol. 53, pp. 684-694, Feb. 2007.

17.  Xiaofu Wu, Haige Xiang, Cong Ling, Xiaohu You, and Shaoqian Li, “Bounds on the decoding error probability of binary block codes over noncoherent block AWGN and fading channels,” IEEE Trans. Wireless Commun., vol. 5, pp. 3193-3203, Nov. 2006.

18.  Cong Ling, W. H. Mow, K. H. Li and A. C. Kot, “Multiple-Antenna differential lattice decoding,” IEEE J-SAC, vol. 23, pp.1821-1829, Sept. 2005.

19.  Cong Ling, K. H. Li and A. C. Kot, "On decision-feedback detection of differential space-time modulation in continuous fading," IEEE Trans. Commun., vol. 52, pp. 1613-1617, Oct. 2004.

20.  Cong Ling, K. H. Li and A. C. Kot, "Noncoherent sequence detection of differential space-time modulation," IEEE Trans. Inform. Theory, vol.49, pp. 2727-2734, Oct. 2003.

21.  Cong Ling, K. H. Li, A. C. Kot, and Q. T. Zhang, "Multisampling decision-feedback linear prediction receivers for differential space-time modulation over Rayleigh fast fading channels," IEEE Trans. Commun., vol. 51, pp. 1214-1223, July 2003.

22.  Guozhen Zang and Cong Ling, "Performance evaluation for bandlimited DS-CDMA systems based on simplified improved Gaussian approximation," IEEE Trans. Commun., vol. 51, pp. 1204-1213, July 2003.

23.  Guozhen Zang and Cong Ling, "Family size of orthogonal Oppermann sequences," Electron. Lett., vol. 37, pp. 631-632, May 2001.

24.  Ling Cong and Wu Xiaofu, "Design and implementation of an FPGA-based generator for chaotic frequency hopping sequences," IEEE Trans. CAS-I, vol. 48, pp. 521-532, May 2001.

25.  Ling Cong and Li Shaoqian, "Chaotic spreading sequences with multiple access performance better than random sequences," IEEE Trans. CAS-I, vol. 47, pp. 394-397, Mar. 2000.

26.  Ling Cong, Wu Xiaofu and Yi Xiaoxin, "On SOVA for nonbinary codes," IEEE Commun. Lett., vol. 3, pp. 335-337, Dec. 1999.

27.  Xiaofu Wu, Cong Ling and Songgeng Sun, "Data-aided phase tracking detection of frequency-shifted DPSK signals with baseband frequency-drift compensation," Electron. Lett., vol.35, no.15, pp. 1222-1223, July 1999.

28.  Ling Cong, Wu Xiaofu and Sun Songgeng, "A general efficient method for chaotic signal estimation," IEEE Trans. Signal Processing, vol. 47, pp. 1424-1427, May 1999.

29.  Ling Cong and Sun Songgeng, "Chaotic frequency hopping sequences," IEEE Trans. Commun., vol. 46, pp. 1433-1437, Nov. 1998.

Conference Papers

1.     Yanfei Yan, Cong Ling and Jean-Claude Belfiore, “Secrecy gain of trellis codes: The other side of the union bound,” ITW 2011, Paraty, Brasil, Oct. 2011.

2.     Cong Ling, Shuiyin Liu, Laura Luzzi and Damien Stehle, “Decoding by embedding: Correct decoding radius and DMT optimality,” ISIT 2011.

3.     Li-Chia Choo, Cong Ling, and Kat-kit Wong, “Achievable rates for lattice coding over the Gaussian wiretap channel,” ICC 2011 Physical Layer Security Workshop.

4.     Kezhi Li, Cong Ling and Lu Gan, “Deterministic compressed-sensing matrices: Where Toeplitz meets Golay,” IEEE ICASSP 2011, Prague, Czech.

5.     Hashi Ning, Cong Ling, and Kin K. Leung, “Relay-aided interference alignment: Feasibility conditions and algorithm,” IEEE Int. Symp. Inform. Theory’10, Austin, US, June 2010.

6.     Shuiyin Liu, Cong Ling, and Damien Stehle, “Randomized lattice decoding: Bridging the gap between lattice reduction and sphere decoding,” IEEE Int. Symp. Inform. Theory’10, Austin, US, June 2010.

7.     Cong Ling and Wai Ho Mow, “A unified view of sorting in lattice reduction: From V-BLAST to LLL and beyond,” IEEE Inform. Theory Workshop 2009, Taormina, Italy.

8.     Kezhi Li, Cong Ling and Lu Gan, “Statistical restricted isometry property of orthogonal symmetric Toeplitz matrices,” IEEE Inform. Theory Workshop 2009, Taormina, Italy.

9.     Haishi Ning, Cong Ling and Kin Leung, “Active physical-layer network coding for cooperative two-way relay channels,” Second IEEE International Workshop on Wireless Network Coding, Rome, Italy, 2009.

10.  Su Gao and Cong Ling, “Multi-dimensional nested lattice quantization for Wyner-Ziv coding,” ICC’09, Dresden, Germany.

11.  Haishi Ning, Cong Ling and Kin Leung, “Near-optimal relaying strategy for cooperative broadcast channel,” ICC’09, Dresden, Germany.

12.  Cong Ling and Wai Ho Mow, “On complex LLL algorithm for digital communications,” LLL+25 Conference, Caen, France, June-July 2007.

13.  Xiaofu Wu, Cong Ling et al., “Towards understanding weighted bit-flipping decoding,” IEEE Int. Symp. Inform. Theory’07, Nice, France, June 2007.

14.  Cong Ling and Nick Howgrave-Graham, “Effective LLL reduction for lattice decoding,” IEEE Int. Symp. Inform. Theory’07, Nice, France, June 2007.

15.  Lu Gan and Cong Ling, “Computation of the dual frame: Forward and backward Greville formulas,” IEEE ICASSP 2007.

16.  Cong Ling, Lu Gan, and Wai Ho Mow, “A dual-lattice view of V-BLAST detection,” IEEE Inform. Theory Workshop, Chengdu, China, Oct. 2006.

17.  Cong Ling, “Gallager bounds for space-time codes in quasi-static fading channels,” IEEE Inform. Theory Workshop, Oct. 2006.

18.  Cong Ling, “Approximate lattice decoding: Primal versus dual basis reduction,” IEEE Int. Symp. Inform. Theory’06, Seattle, July 2006.

19.  Cong Ling, “Towards characterizing the performance of approximate lattice decoding in MIMO communications,” Int. Symp. Turbo Codes / Int. ITG Conf. Source Channel Coding’06, Munich, Germany, Apr. 2006.

20.  Cong Ling, W. H. Mow, K. H. Li and A. C. Kot, “Differential lattice decoding in noncoherent MIMO communication,” ICC’05, Seoul, Korea, May 2005.

21.  Cong Ling, K. H. Li and A. C. Kot, "Gallager bounds for space-time codes," IEEE Communication Theory Workshop 2004, Capri, Italy, May 2004.

22.  Cong Ling, K. H. Li and A. C. Kot, "On Decision-Feedback Detection of Nondiagonal Differential Space-Time Modulation in Temporally Correlated Fading Channels," in Proc. ICC’03, Anchorage, AL, May 2003, pp. 2648–2652.

23.  Cong Ling, K. H. Li and A. C. Kot, "Decision-feedback multiple symbol differential detection of differential space-time modulation in continuously fading channels," in Proc. ICASSP’03, Hong Kong, China, May 2003, pp. IV_45–IV_48.

24.  Cong Ling and Xiaofu Wu, "Linear prediction receiver for differential space-time modulation over time-correlated Rayleigh fading channels," in Proc. ICC'2002, New York.

25.  Xiaofu Wu, Cong Ling and Haige Xiang, "Despreading chip waveform design for coherent delay-locked tracking in DS/SS systems," in Proc. ICC'2002, New York.

Book/Book Chapter

1.      Daniel Valderas, Juan Ignaco Sancho, David Puente, Cong Ling, and Xiaodong Chen, Ultrawideband Antennas: Design and Applications, Imperial College Press, 2010.

2.     Haishi Ning and Cong Ling, “Network coding in heterogeneous wireless networks,” in Heterogeneous Cellular Networks, eds Xiaoli Chu and David Lopez Perez, Cambridge University Press, to be published in 2012.

Talks

1.     Bounded-distance lattice decoding and proximity factors, International Workshop on Coding and Cryptology, Qingdao, China, 2011.

2.     Lattices in communications, Lattice Algorithmics Workshop, CIRM, Marseille, France, 2010.

3.     Gallager bounds for single and multi-antenna codes in fading channels, Hong Kong University of Science and Technology, China, 2009.

4.     Lattice decoding for digital communications: Where Minkowski meets Shannon, ENS Lyon, France, 2007; Cambrdige University, UK, 2008.

 

 

Research Group

 

Postdocs

 

·         Dr. Laura Luzzi (Marie Curie Fellow, lattice coding)

·         Dr. Bashar Ahmad (Compressed sensing, jointly with Dr. Wei Dai)

Postdoctoral fellowships

In addition to occasional funding from myself, there are opportunities of postdoctoral research fellowships:

·         EU Marie Curie Fellowship (offering attractive salary for 2 years)

·         Junior Research Fellowship from Imperial College (3 years)

·         Newton International Fellowship

·         Royal Academy of Engineering Research Fellowship

·         EPSRC Postdoctoral Fellowship

 

PhD students with excellent publication records are strongly encouraged to apply.

 

PhD Students

 

·         Kezhi Li (Topic: compressed sensing)

·         M. Constanza Estela Z. (Topic: interference management)

·         Yanfei Yan (Topic: physical layer security)

·         Zheng Wang (Topic: lattice algorithms)

 

Past PhD Students

 

·         Shuiyin Liu (Topic: lattice technique for MIMO/broadcast)

·         Haishi Ning (Topic: cooperative networks, jointly with Prof. K. Leung)

·         Su Gao (Topic: distributed source coding)

·         Khalid Nur (Topic: localization, jointly with Prof. W. Ochieng)

Information for prospective students

If you want to apply for admission, you are advised to apply through the PhD Admission of Electrical and Electronic Engineering. If you are interested in my research areas, please suggest Dr. Cong Ling as your future supervisor in the application form. You are recommended to pursue the MSc degree first (although this is not mandatory) if you have a Bachelor degree only. Feel free to contact me should you have any queries. I apologize that I am unable to reply to everyone due to the large number of emails. I will contact you if further information is needed.

Departmental funding is available to support PhD students. The College also runs a number of scholarships for PhD students. In particular, excellent applicants who are nationals of China are advised to apply for the CSC-Imperial Scholarship.

Academic Visitors

·         Daniel Valderas, Assistant Professor, CEIT, Spain (2008)

·         Xiaomei Fu, Associate Professor, Tianjin University, China (2009)

 

Awards

·         Singapore Millennium Foundation (SMF) Award, 2002-2004.

 

Courses

·         Communication Systems

·         Information Theory