Opportunistic Interference Management in MIMO Broadcast Channels

February 26, 2010
Professor Hamid R. Sadjadpour
Electrical Engineering Department, University of California, Santa Cruz


We introduce a technique to achieve dirty paper coding (DPC) capacity asymptotically with minimum feedback required reported to date in literature.

Our approach called opportunistic interference management, is based on a new multiuser diversity scheme designed for wireless cellular networks. When there are M antennas at the base station with K mobile users in the cell, the proposed technique only requires M integer numbers related to channel state information (CSI) between mobile users and base station. The encoding and decoding complexity of this scheme is the same as that of point-to-point communications. We introduce techniques to guarantee fairness and to incorporate opportunistic interference management into existing TDMA standards. We also introduce an antenna selection diversity to reduce the minimum required mobile users in a cell for a given multiplexing gain.


Hamid R. Sadjadpour Hamid R. Sadjadpour received his B.S. and M.S. degrees from Sharif University of Technology and Ph.D. degree from University of Southern California in 1986, 1988 and 1996, respectively. After graduation, he joined AT&T as a member of technical staff and finally as a Principal member of technical staff at AT&T Lab. in Florham Park, NJ until 2001. In fall 2001, he joined University of California, Santa Cruz (UCSC) where he is now an Associate Professor.

Dr. Sadjadpour has served as chair and technical program committee member in numerous conferences. His research interests include scaling laws for wireless ad hoc networks, performance analysis of ad hoc and sensor networks, and design of MAC and routing protocols for MANETs. He has more than 130 publications. He is the co-recipient of International Symposium on Performance Evaluation of Computer and Telecommunication Systems (SPECTS) 2007 best paper award and the IEEE Fred W. Ellersick Award for Best Unclassified Paper at the 2008 Military Communications (MILCOM) conference. He holds more than 13 patents, one of them accepted in spectrum management of T1.E1.4 standard.