TY - GEN
T1 - Diversity-multiplexing tradeoff in cooperative wireless systems
AU - Yuksel, Melda
AU - Erkip, Elza
PY - 2006
Y1 - 2006
N2 - We first examine a system with a single source-destination pair and two relays, each node with a single antenna, and explore whether this virtual multi-input multi-output (MIMO) system can mimic a physical MIMO in terms of diversity-multiplexing tradeoff (DMT). We show that even under the idealistic assumption of full-duplex relays and a clustered network, the relay system can never fully mimic a real MIMO DMT, it is multiplexing gain limited. The limitation comes from the fact that source and destination are connected to relays with finite capacity links. We provide communication strategies that achieve the best DMT of this relay system. We extend our work to cover cooperative systems with multiple sources and multiple destinations and show that the same limitation is still in effect. Our results suggest that while cooperative relaying is able to provide high spatial diversity for low multiplexing gains, it can never mimic a physical MIMO for large multiplexing gains.
AB - We first examine a system with a single source-destination pair and two relays, each node with a single antenna, and explore whether this virtual multi-input multi-output (MIMO) system can mimic a physical MIMO in terms of diversity-multiplexing tradeoff (DMT). We show that even under the idealistic assumption of full-duplex relays and a clustered network, the relay system can never fully mimic a real MIMO DMT, it is multiplexing gain limited. The limitation comes from the fact that source and destination are connected to relays with finite capacity links. We provide communication strategies that achieve the best DMT of this relay system. We extend our work to cover cooperative systems with multiple sources and multiple destinations and show that the same limitation is still in effect. Our results suggest that while cooperative relaying is able to provide high spatial diversity for low multiplexing gains, it can never mimic a physical MIMO for large multiplexing gains.
UR - http://www.scopus.com/inward/record.url?scp=44049106476&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=44049106476&partnerID=8YFLogxK
U2 - 10.1109/CISS.2006.286623
DO - 10.1109/CISS.2006.286623
M3 - Conference contribution
AN - SCOPUS:44049106476
SN - 1424403502
SN - 9781424403509
T3 - 2006 IEEE Conference on Information Sciences and Systems, CISS 2006 - Proceedings
SP - 1062
EP - 1067
BT - 2006 IEEE Conference on Information Sciences and Systems, CISS 2006 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2006 40th Annual Conference on Information Sciences and Systems, CISS 2006
Y2 - 22 March 2006 through 24 March 2006
ER -