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Rethinking MIMO for Wireless Networks: Linear Throughput Increases with Multiple Receive Antennas

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Per teresa.san.jose Darrera modificació 14-11-2008 20:58

Speaker: Nihar Jindal, Ph.D. Affiliation: University of Minnesota, Dept. of Electrical & Computer Engineering

Què Seminari
Quan 19-11-2008
de 10:00 a 10:45
On CTTC Room Auditorium
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SPEAKER: Nihar Jindal (S’99-M’04) received the B.S. degree in Electrical Engineering and Computer Science from U.C. Berkeley in 1999, and the M.S. and Ph.D. degrees in Electrical Engineering from Stanford University in 2001 and 2004. He is an assistant professor in the Department of Electrical and Computer Engineering at the University of Minnesota. His research spans the fields of information theory and wireless communication, with specific interests in multiple-antenna/multi-user channels, dynamic resource allocation, and sensor and ad-hoc networks. Dr. Jindal was the recipient of the 2005 IEEE Communications Society and Information Theory Society Joint Paper Award, the McKnight Land-Grant Professorship in 2007, and the NSF CAREER award in 2008.

ABSTRACT: In this talk we investigate the benefit of multiple antenna communication in wireless ad hoc networks. The primary finding is that throughput can be made to scale linearly with the number of receive antennas, even if each transmitting node uses only a single antenna. The linear throughput gain is achieved by (i) using the receive antennas to cancel the signals of nearby interferers as well as to increase signal power (i.e., for array gain), and (ii) maintaining a constant per-link rate and increasing the spatial density of simultaneous transmissions linearly with the number of antennas at each receiver. Numerical results show that even a few receive antennas provide substantial throughput gains, thereby illustrating that the asymptotic linear scaling result is also indicative of performance for reasonable numbers of antennas.

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