Xiugang Wu

My research interests are in the area of information theory, with an emphasis on its applications to communication networks and machine learning. In particular, my research aims to address the following two fundamental problems regarding information transmission and extraction that arise in the networked big data era: 1) how to efficiently operate a communication network, so as to provide the capacity needed for transporting big data; and 2) how to effectively extract useful information from big data, particularly in a distributed fashion across the network.

I am now on the job market. Please see my Cover Letter, CV, Research Statement, and Teaching Statement.

Publications

Journals

• X. Wu, L. Barnes and A. Ozgur, ````The capacity of the relay channel'': Solution to Cover's problem in the Gaussian Case,'' submitted to IEEE Trans. Inform. Theory, Jan. 2017; Revised Oct. 2017. Available online at https://arxiv.org/abs/1701.02043.
• X. Wu and A. Ozgur, ``Cut-set bound is loose for Gaussian relay networks,'' IEEE Trans. Inform. Theory, vol. 64, pp. 1023-1037, February 2018.
• X. Wu, A. Ozgur and L.-L. Xie ``Improving on the cut-set bound via geometric analysis of typical sets,'' IEEE Transactions on Information Theory, vol. 63, pp. 2254-2277, April 2017.
• X. Wu, S. Zhang and A. Ozgur ``STAC: Simultaneous Transmitting and Air Computing in wireless data center networks,'' IEEE Journal on Selected Areas in Communications, vol. 34, pp. 4024-4034, December 2016.
• X. Wu and L.-L. Xie, ``A unified relay framework with both D-F and C-F relay nodes,'' IEEE Transactions on Information Theory, vol. 60, no.1, pp. 586-604, January 2014.
• X. Wu and L.-L. Xie, ``On the optimal compressions in the compress-and-forward relay schemes,'' IEEE Transactions on Information Theory, vol. 59, no. 5, pp. 2613-2628, May 2013.

Conferences

• L. Barnes, X. Wu, A. Ozgur, ``A solution to Cover's problem for the binary symmetric relay channel: Geometry of sets on the Hamming sphere'','' 55th Annual Allerton Conference on Communication, Control, and Computing, Illinois, 2017.
• X. Wu, L. Barnes, A. Ozgur, ``The geometry of the relay channel'','' IEEE International Symposium on Information Theory, Aachen, Germany, June 2017.
• X. Wu, L. Barnes, A. Ozgur, ``Cover's open problem: ``The capacity of the relay channel'','' 54th Annual Allerton Conference on Communication, Control, and Computing, Illinois, 2016. (Invited)
• X. Wu and A. Ozgur, ``Improving on the cut-set bound for general primitive relay channels,'' IEEE International Symposium on Information Theory, Barcelona, Spain, Jul. 2016.
• X. Wu and A. Ozgur, ``Improving on the cut-set bound via geometric analysis of typical sets,'' International Zurich Seminar on Communications, 2016.
• X. Wu and A. Ozgur, ``Cut-set bound is loose for Gaussian relay networks,'' 53rd Annual Allerton Conference on Communication, Control, and Computing, Illinois, 2015.
• X. Wu, L.-L. Xie and A. Ozgur, ``Upper bounds on the capacity of symmetric primitive relay channels,'' IEEE International Symposium on Informaiton Theory, Hong Kong, 2015.
• S. Zhang, X. Wu and A. Ozgur, ``STAC: Simultaneous Transmitting and Air Computing in wireless data center networks,'' IEEE/CIC International Conference on Communications in China, Shenzhen, China, 2015.
• Z. Ma, X. Wu and H. Xu, ``Understanding the degree distribution pattern of protein-protein interaction networks,'' IEEE International Symposium on Bioelectronics and Bioinformatics, Beijing, China, 2015.
• X. Wu and L.-L. Xie, ``A unified relay framework with both D-F and C-F relay nodes,'' 13th Canadian Workshop on Information Theory, Toronto, Canada, 2013.
• X. Wu and L.-L. Xie, ``Codebook information does not reduce output entropy when rate is above capacity,'' 48th Annual Allerton Conference on Communication, Control, and Computing, Illinois, 2010. (Invited)
• X. Wu and L.-L. Xie, ``On the optimality of successive decoding in compress-and-forward relay schemes,'' 48th Annual Allerton Conference on Communication, Control, and Computing, Illinois, 2010. (Invited)
• X. Wu and L.-L. Xie, ``An optimality-robustness tradeoff in the compress-and-forward relay scheme,'' IEEE 72nd Vehicular Technology Conference, Ottawa, Canada, 2010.
• X. Wu and L.-L. Xie, ``AEP of output when rate is above capacity: the Gaussian case,'' IEEE International Symposium on Informaiton Theory 2010, Austin, Texas, 2010.
• X. Wu and L.-L. Xie, ``AEP of output when rate is above capacity,'' 11th Canadian Workshop on Information Theory, Ottawa, Canada, 2009.

PhD Dissertation

• Coding schemes for multiple-relay channels