Douglas S. Chan Email: douglas.chan [at] ieee.org

Biographical Sketch

From 1998 to 2000, Doug was with the IBM Toronto Lab as Software Engineer, when he was involved with developing enterprise-scaled applications for database access, distributed computing and network management. From Jan to May 2006, he was a Visiting Scientist with the School of ECE at Cornell University. In July 2006, Doug joined Cisco Systems, Wireless Networking Business Unit, as Wireless Systems Engineer; and he has been Senior Wireless Systems Engineer since July 2008. His current work includes research and development (R&D) of wireless local area networking products and their standardizations.

In addition, Doug had multiple internships in the wireless industry: Hong Kong Telecom CSL (now CSL New World Mobility), Mobile Networks (Radio Planning); Texas Instruments, Communications Systems Lab, Digital Signal Processing R&D Center; and Symbol Technologies (now Motorola), Corporate R&D.

Doug is a member of IEEE and a licensed professional engineer (P.Eng.) of Ontario, Canada. From 2007 to 2009, he was elected as the Secretary for the IEEE Signal Processing Society Santa Clara Valley chapter. Doug has also received recognitions from the IEEE Standards Association for his contributions to the 802.11n and 802.11y standards.

Research Areas

• Multiple access in communication networks
  
• performance and cross-layer design of network systems
• collision resolution algorithms
• multiuser information theory
• radio resource management for wireless systems
• Physical layer techniques for wireless channels
• performance and design of MIMO-OFDM-based wireless physical layers
• multiuser communications via coding and MIMO signaling
• Industry standards for WPANs, WLANs and WMANs
• IEEE 802 standards
• Video source encoding and compression
• wireless video conferencing on mobile devices
• objective-based video quality assessment

Contributions

• Douglas S. Chan, "Random Multiple Access Communications on Multipacket Reception Channels," Ph.D. dissertation, Cornell University, Jan 2006.  [Abstract]

• Douglas S. Chan and Toby Berger, "Upper Bound for the Capacity of Multiple Access Protocols on Multipacket Reception Channels," to appear in 2012 IEEE International Symposium on Information Theory (ISIT), Jul 2012. 
• Qi Wang, Lenoard J. Cimini, Larry J. Greenstein and Douglas S. Chan, "Single-User and Multi-User Mode Selection for MIMO Broadcast Channels with Imperfect Channel State Information," Conference on Information Sciences and Systems (CISS), Mar 2012. 
• Qi Wang, Xiantao Sun, Lenoard J. Cimini, Larry J. Greenstein and Douglas S. Chan, "Interference Management Approaches for MU-MIMO in Shadow Fading," Conference on Information Sciences and Systems (CISS), Mar 2011.  [Abstract]
• Xiantao Sun, Lenoard J. Cimini, Larry J. Greenstein and Douglas S. Chan, "ICI/ISI Aware Beamforming for MIMO-OFDM Wireless System," Conference on Information Sciences and Systems (CISS), Mar 2009.  [Abstract]
• Xiantao Sun, Lenoard J. Cimini, Douglas S. Chan and Larry J. Greenstein, "Enhance IEEE 802.11n Quantized Feedback Beamforming with Power Allocation," Conference on Information Sciences and Systems (CISS), Mar 2008.  [Abstract]
• Xiantao Sun, Lenoard J. Cimini, Larry J. Greenstein, Douglas S. Chan and Brett Douglas, "Performance of Quantized Feedback Beamforming in MIMO-OFDM Links Over Time-Varying, Frequency-Selective Channels," Military Communications Conference (MILCOM) 2007, Oct 2007.  [Abstract]
• Xiantao Sun, Lenoard J. Cimini, Larry J. Greenstein, Douglas S. Chan and Brett Douglas, "Performance Evaluation of Quantized Feedback Beamforming in IEEE 802.11n," Conference on Information Sciences and Systems (CISS), Mar 2007.  [Abstract]
• Douglas S. Chan and Toby Berger, "On the Capacity of Infinite Population Multiple Access Protocols with Multipacket Reception Capability," Proc. of Allerton Conference on Communication, Control, and Computing, Sept 2005.  [Abstract]
• Douglas S. Chan and Toby Berger, "Collision Detection for Carrier Sense Multiple Access in Wireless Networks," Proc. of 16th Annual IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC), Sept 2005.  [Abstract]
  
• Douglas S. Chan and Toby Berger, "Performance and Cross-Layer Design of CSMA for Wireless Networks with Multipacket Reception Capability," Conf. Rec. of the 38th Asilomar Conference on Signals, Systems and Computers, vol. 2, pp. 1917-1921, Nov 2004.  [Abstract]
• Douglas S. Chan, Toby Berger and Lang Tong, "On the Stability and Optimal Decentralized Throughput of CSMA with Multipacket Reception Capability," Proc. of Allerton Conference on Communication, Control, and Computing, Sept-Oct 2004.
• Douglas S. Chan, Toby Berger and Raj Bridgelall, "Energy Efficiency of CSMA Protocols for Wireless Packet Switched Networks," Proc. of IEEE Wireless Communications and Networking Conference (WCNC), vol. 1, pp. 447-452, Mar 2004.

• Douglas Chan and Toby Berger, "Insights from CSMA with Multipacket Reception: Achieving >1 Gbps Aggregate Throughput with a Multiuser-based Physical Layer," IEEE 802.11-09/0859r0, July 2009.
• Douglas Chan, Brian Hart, Lian Jiang, Jan Kruys, Malik Audeh, Jorjeta Jetcheva and Stephen Rayment, "VoIP Traffic by Draft-n Greenfield Devices Causes False RADAR Detection on DFS Channels," IEEE 802.11-08/0301r0, Mar 2008.
• Douglas Chan, Prapun Suksompong, Jun Chen and Toby Berger, "Improving IEEE 802.11 Performance with Cross-Layer Design and Multipacket Reception via Multiuser Iterative Decoding," IEEE 802.11-05/0946r0, Sept 2005.

[Complete list of industry standards submissions]

• Douglas S. Chan and Toby Berger, "Methods and Systems for Channel Sensing Multiple Access Communications with Multipacket Reception."
• Innovations that can be applied to enhance performance for CSMA-based wired and wireless communications, including the widely adopted Ethernet and IEEE 802.11 wireless LAN standards. (See whitepaper below for more details.) 
  
• Douglas S. Chan and Toby Berger, "Systems and Methods to Detect Collisions in Channel Sense Multiple Access Communications."
• Innovations for performing collision detection in CSMA-based communications, with focus put on implementing this on wireless systems and those with multipacket reception. (See whitepaper below for more details.) 
  

• Douglas S. Chan, "Technologies Delivering Multiuser Transmission for Next-Generation IEEE 802.11 Wireless Networks," Nov 5, 2007.
• Investigates the impacts that the above two multiuser-based CSMA ideas can effect on the next generation of 802.11 WLAN standard being discussed by the IEEE Very High Throughput Study Group. 
  

• "Insights from CSMA with Multipacket Reception: Achieving >1 Gbps Aggregate Throughput on Next Generation Wireless LANs," Electrical and Computer Engineering Department, University of Virginia, Sep 3, 2009. (Joint work with Toby Berger.)
• "Optimal Decentralized Throughput of CSMA and Multiple Access Protocols on Multipacket Reception Channels," Department of Electrical and Electronic Engineering, The Hong Kong University of Science and Technology, Hong Kong, May 16, 2006. (Joint work with Prapun Suksompong, Jun Chen, Lang Tong and Toby Berger.)
• "Channel Sense Multiple Access and IEEE 802.11 Wireless LANs with Multipacket Reception Capability," Hong Kong Applied Science and Technology Research Institute, Hong Kong, May 15, 2006. (Joint work with Prapun Suksompong, Jun Chen, Lang Tong and Toby Berger.)
• "An Introduction to CU30: Video Encoding and Compression Algorithm," Hong Kong Applied Science and Technology Research Institute, Hong Kong, May 15, 2006. (Joint work with Toby Berger.)
• "Optimal Decentralized Throughput of CSMA and Multiple Access Protocols on Multipacket Reception Channels," Department of Information Engineering, The Chinese University of Hong Kong, May 10, 2006. (Joint work with Prapun Suksompong, Jun Chen, Lang Tong and Toby Berger.)
• "On the Capacity of Infinite Population Multiple Access Protocols on Multipacket Reception Channels," Department of Electrical Engineering and Institute of Communications Engineering, National Tsing Hua University, Taiwan, March 17, 2006. (Joint work with Toby Berger.)
• "Optimal Decentralized Throughput of Channel Sense Multiple Access with Multipacket Reception Capability," Department of Electrical Engineering and Institute of Communications Engineering, National Tsing Hua University, Taiwan, March 17, 2006. (Joint work with Prapun Suksompong, Jun Chen, Lang Tong and Toby Berger.)

• Xiantao Sun, Qi Wang, Lenoard J. Cimini, Larry J. Greenstein and Douglas S. Chan, "ICI/ISI-Aware Beamforming for MIMO-OFDM Wireless Systems," accepted for publication, to appear in IEEE Trans. on Wireless Communications.  [Abstract]
• Xiantao Sun, Lenoard J. Cimini, Larry J. Greenstein and Douglas S. Chan, "Evaluation of Quantized Feedback Beamforming in Wireless LAN Networks for Indoor and Outdoor Environments," (In preparation for submission.)
• Douglas S. Chan and Toby Berger, "On the Capacity of Infinite Population Multiple Access Protocols with Multipacket Reception Capability." (In preparation for submission.)
• Douglas S. Chan, Toby Berger and Lang Tong, "Carrier Sense Multiple Access with Multipacket Reception: Theory and Applications to Wireless Networks." (In preparation for submission.)