Feedback Role under Interference
Tues., Sept 22, 2009
2:00 - 3:00 PM
400 Cory (Hughes room)
2:00 - 3:00 PM
400 Cory (Hughes room)
We present how much feedback helps increase capacity in communications. Feedback has been extensively investigated due to the bi-directional property of communication links. However, it has been of little interest in increasing capacity. This is mainly due to Shannon's original result on feedback capacity, where he showed that feedback cannot increase the capacity of point-to-point links. What we showed is a positive result on feedback capacity: when there are two interfering point-to-point links, not only feedback can increase capacity of each link, feedback can in fact provide an unbounded increase in capacity as the signal-to-noise ratio of the links increase. In the process of showing this conclusion, we characterized the feedback capacity of two-user interference channel with a guarantee on one-bit gap to optimality.
Bio:
Changho Suh received the B.S. and M.S. degrees in electrical engineering from Korea Advanced Institute of Science and Technology, Daejeon, Korea, in 2000 and 2002, respectively. From 2002 to 2006, he had been with the Department of Telecommunication R&D Center, Samsung Electronics, Korea, where he was working on a fourth-generation communication project (e.g., WiMAX systems). From 2006, he has been with the Department of Electrical Engineering and Computer Science in the University of California at Berkeley, where he is pursuing the Ph.D. degree under the supervision of Prof. David Tse. He awarded the best student paper award from IEEE International Symposium on Information Theory 2009. He awarded the Vodafone U.S. Foundation Fellowship in 2006 and 2007. Also he received a 6-year fellowship from the government of Korea from 1996 to 2002. His research interests include information theory and wireless communications. Currently he is working on interference management techniques: interference alignment for cellular networks; interference mitigation schemes via feedback.
Bio:
Changho Suh received the B.S. and M.S. degrees in electrical engineering from Korea Advanced Institute of Science and Technology, Daejeon, Korea, in 2000 and 2002, respectively. From 2002 to 2006, he had been with the Department of Telecommunication R&D Center, Samsung Electronics, Korea, where he was working on a fourth-generation communication project (e.g., WiMAX systems). From 2006, he has been with the Department of Electrical Engineering and Computer Science in the University of California at Berkeley, where he is pursuing the Ph.D. degree under the supervision of Prof. David Tse. He awarded the best student paper award from IEEE International Symposium on Information Theory 2009. He awarded the Vodafone U.S. Foundation Fellowship in 2006 and 2007. Also he received a 6-year fellowship from the government of Korea from 1996 to 2002. His research interests include information theory and wireless communications. Currently he is working on interference management techniques: interference alignment for cellular networks; interference mitigation schemes via feedback.
UC Berkeley Networking
Kristen Woyach and Pulkit Grover Last Modification Date: Wednesday, August 19, 2009
Kristen Woyach and Pulkit Grover Last Modification Date: Wednesday, August 19, 2009