TY - GEN

T1 - Opportunistic cooperative diversity protocols for wireless networks

AU - Ding, Zhiguo

AU - Gong, Y.

AU - Ratnarajah, T.

AU - Cowan, C. F.N.

PY - 2007

Y1 - 2007

N2 - In this paper we consider a cooperative communication system where some a priori information of wireless channels is available at the transmitter. Several opportunistic relaying strategies are developed to fully utilize the available channel information. Then an explicit expression of the outage probability is developed for each proposed cooperative scheme as well as the diversity-multiplexing tradeoff by using order statistics. Our analytical results show that the more channel information available at the transmitter, the better performance a cooperative system can achieve. When the exact values of the source-relay channels are available, the performance loss at low SNR can be effectively suppressed. When the source node has the access to the source-relay and relay-destination channels, the full diversity can be achieved by costing only one extra channel used for relaying transmission, and an optimal diversity-multiplexing tradeoff can be achieved d(r) = (N + 1) (1 - 2r), where N is the number of all possible relaying nodes.

AB - In this paper we consider a cooperative communication system where some a priori information of wireless channels is available at the transmitter. Several opportunistic relaying strategies are developed to fully utilize the available channel information. Then an explicit expression of the outage probability is developed for each proposed cooperative scheme as well as the diversity-multiplexing tradeoff by using order statistics. Our analytical results show that the more channel information available at the transmitter, the better performance a cooperative system can achieve. When the exact values of the source-relay channels are available, the performance loss at low SNR can be effectively suppressed. When the source node has the access to the source-relay and relay-destination channels, the full diversity can be achieved by costing only one extra channel used for relaying transmission, and an optimal diversity-multiplexing tradeoff can be achieved d(r) = (N + 1) (1 - 2r), where N is the number of all possible relaying nodes.

KW - Cooperative transmission

KW - Diversity-multiplexing tradeoff

KW - Multiple-input multiple-output

UR - http://www.scopus.com/inward/record.url?scp=47849119283&partnerID=8YFLogxK

U2 - 10.1109/ITWITWN.2007.4318045

DO - 10.1109/ITWITWN.2007.4318045

M3 - Conference contribution

AN - SCOPUS:47849119283

SN - 1424411998

SN - 9781424411993

T3 - Proceedings of the 2007 IEEE Information Theory Workshop on Information Theory for Wireless Networks, ITW

SP - 121

EP - 125

BT - Proceedings of the 2007 IEEE Information Theory Workshop on Information Theory for Wireless Networks, ITW

T2 - 2007 IEEE Information Theory Workshop on Information Theory for Wireless Networks, ITW

Y2 - 1 July 2007 through 6 July 2007

ER -