Kobi Cohen's Homepage

Kobi Cohen Kobi Cohen, Ph. D.
Senior Lecturer
Department of Electrical and Computer Engineering
Ben-Gurion University of the Negev
Phone: +972-8-6479517
yakovsec@bgu.ac.il

Short Bio:

I am a Senior Lecturer (a.k.a. Assistant Professor in the US) at the Department of Electrical and Computer Engineering at Ben-Gurion University of the Negev, Israel. From 2014 to 2015 I was a Postdoctoral Research Associate at the Coordinated Science Lab, University of Illinois at Urbana-Champaign. From 2012 to 2014 I was a Postdoctoral Researcher at the Electrical and Computer Engineering Department, University of California, Davis. I received the B.Sc. and Ph.D degrees in electrical engineering from Bar-Ilan University, Ramat Gan, Israel, in 2007, 2013, respectively.

Research Interests:


Publications:


Journal Papers

  1. Kobi Cohen and Amir Leshem, Spectrum and energy efficient multiple access for detection in wireless sensor networks, submitted to IEEE Transactions on Signal Processing.

  2. Bar Hemo, Kobi Cohen, and Qing Zhao, Searching for anomalies over composite hypotheses, submitted to IEEE Transactions on Signal Processing.

  3. Oshri Naparstek and Kobi Cohen, Deep multi-user reinforcement learning for distributed dynamic spectrum access, revised, IEEE Transactions on Wireless Communications. A short version, entitled "deep multi-user reinforcement learning for dynamic spectrum access in multichannel wireless networks", was presented at IEEE Globecom 2017.

  4. Boshuang Huang, Kobi Cohen, and Qing Zhao, Active detection of anomalies in heterogeneous processes. submitted to IEEE Transactions on Information Theory.

  5. Kobi Cohen, Angelia Nedic, and R. Srikant, On projected stochastic gradient descent algorithm with weighted averaging for least squares regression, IEEE Transactions on Automatic Control, vol. 62, pp. 5974-5981, Nov. 2017.

  6. Kobi Cohen, Angelia Nedic, and R. Srikant, Distributed learning algorithms for spectrum sharing in spatial random access wireless networks, IEEE Transactions on Automatic Control, vol. 6, pp. 2854-2869, June 2017.

  7. Kobi Cohen and Amir Leshem, Distributed game theoretic optimization and management of multi-channel ALOHA networks, IEEE/ACM Transactions on Networking, vol. 24, pp. 1718-1731, June 2016.

  8. Kobi Cohen and Qing Zhao, Asymptotically optimal anomaly detection via sequential testing, IEEE Transactions on Signal Processing, vol. 63, pp. 2929-2941, June 2015.

  9. Kobi Cohen and Qing Zhao, Active hypothesis testing for anomaly detection, IEEE Transactions on Information Theory, vol. 61, pp. 1432-1450, Mar. 2015.

  10. Kobi Cohen , Qing Zhao, and Ananthram Swami, Optimal index policies for anomaly localization in resource-constrained cyber systems, IEEE Transactions on Signal Processing, vol. 62, pp. 4224-4236, Aug. 2014.

  11. Kobi Cohen, Amir Leshem, and Ephraim Zehavi, Game theoretic aspects of the multi-channel ALOHA protocol in cognitive radio networks, IEEE Journal on Selected Areas in Communications, vol. 31, pp. 2276-2288, Nov. 2013.

  12. Kobi Cohen and Amir Leshem, Performance analysis of likelihood-based multiple access for detection over fading channels, IEEE Transactions on Information Theory, vol. 59, pp. 2471-2481, Apr. 2013.

  13. Oshri Naparstek, Kobi Cohen, and Amir Leshem, Parametric spectrum shaping for downstream spectrum management of digital subscriber lines, IEEE Communications Letters, vol. 16, pp. 417-419, Mar. 2012.

  14. Kobi Cohen and Amir Leshem, Energy-efficient detection in wireless sensor networks using likelihood ratio and channel state information, IEEE Journal on Selected Areas in Communications, vol. 29, pp. 1671-1683, Sep. 2011.

  15. Kobi Cohen and Amir Leshem, A time-varying opportunistic approach to lifetime maximization of wireless sensor networks, IEEE Transactions on Signal Processing, vol. 58 , pp. 5307-5319, Oct. 2010.

Conference Papers

  1. Kobi Cohen and Amir Leshem, Spectrum and energy efficient multiple access for detection in wireless sensor networks, to appear in IEEE International Symposium on Information Theory (ISIT) 2018.

  2. Tomer Gafni and Kobi Cohen, Learning in restless multi-armed bandits using adaptive arm sequencing rules, to appear in IEEE International Symposium on Information Theory (ISIT) 2018.

  3. Boshuang Huang, Kobi Cohen, and Qing Zhao, Active anomaly detection in heterogeneous processes, to appear in IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP) 2018.

  4. Oshri Naparstek and Kobi Cohen, Deep multi-user reinforcement learning for dynamic spectrum access in multichannel wireless networks, in Proc. of the IEEE Global Communications Conference (GLOBECOM), Singapore, Dec. 2017.

  5. Andrey Gurevich, Kobi Cohen, and Qing Zhao, Anomaly Detection under a Nonlinear System Cost Objective Function, to appear in the 55th Annual Allerton Conference on Communication, Control, and Computing 2017.

  6. Chao Wang, Kobi Cohen, and Qing Zhao, Active hypothesis testing on a tree: Anomaly detection under hierarchical observations, in Proc. of the IEEE International Symposium on Information Theory (ISIT), Aachen, Germany, Jun. 2017.

  7. Bar Hemo, Kobi Cohen, and Qing Zhao, Asymptotically optimal search of unknown anomalies, in Proc. of the 16th IEEE Symposium on Signal Processing and Information Technology (ISSPIT), Limassol, Cyprus, Dec. 2016.

  8. Kobi Cohen, Angelia Nedic, and R. Srikant, On projected stochastic gradient descent algorithm with weighted averaging for least squares regression, in Proc. of the 41st International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Shanghai, China, Mar. 2016.

  9. Kobi Cohen, Angelia Nedic, and R. Srikant, Distributed learning algorithms for spectrum sharing in spatial random access networks, in Proc. of the 13th International Symposium on Modeling and Optimization in Mobile, Ad hoc and Wireless Networks (WiOpt), Mumbai, India, May 2015.

  10. Kobi Cohen, Qing Zhao, and Anna Scaglione, Restless multi-armed bandits under time-varying activation constraints for dynamic spectrum access, in Proc. of the 48th Asilomar Conference on Signals, Systems and Computers, Pacific Grove, CA, USA, Nov. 2014.

  11. Kobi Cohen and Qing Zhao, Anomaly detection over independent processes: switching with memory, in Proc. of the 52nd Annual Allerton Conference on Communication, Control, and Computing, Allerton Park, IL, USA, Oct. 2014.

  12. Kobi Cohen and Qing Zhao, Quickest anomaly detection: a case of active hypothesis testing, in Proc. of Information Theory and Applications (ITA) Workshop, San Diego, CA, USA ,Feb. 2014.

  13. Kobi Cohen, Qing Zhao, and Ananthram Swami, Optimal Index Policies for Quickest localization of anomaly in cyber networks, in Proc. of IEEE Global Conference on Signal and Information Processing (GlobalSIP), pp. 221-224, Austin, TX, USA, Dec. 2013.

  14. Kobi Cohen and Amir Leshem, Distributed throughput maximization for multi-channel ALOHA networks, in Proc. of IEEE International Workshop on Computational Advances in Multi-Sensor Adaptive Processing (CAMSAP), pp. 456-459, Saint Martin, Dec. 2013.

  15. Kobi Cohen, Amir Leshem, and Ephraim Zehavi, A game theoretic optimization of the multi-channel ALOHA protocol, in Proc. of EAI International Conference on Game Theory for Networks (GameNets), pp. 77-87, Vancouver, Canada, May. 2012.

  16. Kobi Cohen and Amir Leshem, Likelihood ratio and channel-based access for energy-efficient detection in wireless sensor networks, in Proc. of IEEE sensor array and multi channel signal processing workshop (SAM) , pp. 17-20, Israel, Oct. 2010.

  17. Kobi Cohen and Amir Leshem, Time-varying opportunistic protocol for maximizing sensor networks lifetime, in Proc. of IEEE Acoustics, Speech and Signal Processing (ICASSP), pp. 2421-2424, Taipei, Taiwan, Apr. 2009.

  18. Selected Conference Talks Without Proceeding

  19. Kobi Cohen, Distributed learning algorithms for spectrum sharing in spatial networks, Israeli Networking Day, Tel-Aviv University, Tel-Aviv, Israel, Jun. 2016.

  20. Kobi Cohen, Game theoretic optimization over collision channels, Interdisciplinary Workshop on Game Theory at UC Davis, Davis, CA, USA, Apr. 2014.

  21. Kobi Cohen, Optimal index policies for anomaly detection in resource-constrained cyber-systems, Graduation Day's talk at Information Theory and Applications (ITA) Workshop, San Diego, CA, USA, Feb. 2014.

  22. Kobi Cohen, Dynamic probing and quickest detection for intrusion detection under resource constraints, Workshop for Developing a Science of Cybersecurity, University of Maryland, College Park, MD, USA, Jun. 2013.

Awards: