TY - GEN
T1 - Amplify-and-forward based cooperation for secure wireless communications
AU - Dong, Lun
AU - Han, Zhu
AU - Petropulu, Athina P.
AU - Poor, H. Vincent
PY - 2009
Y1 - 2009
N2 - A physical layer approach to security for wireless networks is considered. In single-antenna wireless systems, such approaches are hampered by channel conditions in the presence of one or more eavesdroppers. Cooperation has the potential to overcome this problem and improve the security of of wireless communications. In this paper, an amplify-andforward based cooperative protocol is proposed. Assuming availability of global channel state information, system design that maximizes the secrecy capacity is considered. Since the optimal solution to this problem is intractable, suboptimal closed-form solutions are proposed that optimize bounds on secrecy capacity for the case of a single eavesdropper, or that introduce additional constraints, such as nulling of signals at all eavesdroppers, for the case of multiple eavesdroppers.
AB - A physical layer approach to security for wireless networks is considered. In single-antenna wireless systems, such approaches are hampered by channel conditions in the presence of one or more eavesdroppers. Cooperation has the potential to overcome this problem and improve the security of of wireless communications. In this paper, an amplify-andforward based cooperative protocol is proposed. Assuming availability of global channel state information, system design that maximizes the secrecy capacity is considered. Since the optimal solution to this problem is intractable, suboptimal closed-form solutions are proposed that optimize bounds on secrecy capacity for the case of a single eavesdropper, or that introduce additional constraints, such as nulling of signals at all eavesdroppers, for the case of multiple eavesdroppers.
KW - Amplify-and-forward
KW - Cooperation
KW - Physical layer based wireless security
KW - Secrecy capacity
UR - http://www.scopus.com/inward/record.url?scp=70349218031&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=70349218031&partnerID=8YFLogxK
U2 - 10.1109/ICASSP.2009.4960158
DO - 10.1109/ICASSP.2009.4960158
M3 - Conference contribution
AN - SCOPUS:70349218031
SN - 9781424423545
T3 - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
SP - 2613
EP - 2616
BT - 2009 IEEE International Conference on Acoustics, Speech, and Signal Processing - Proceedings, ICASSP 2009
T2 - 2009 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2009
Y2 - 19 April 2009 through 24 April 2009
ER -