TY - GEN
T1 - On the secure Degrees of Freedom in the k-user Gaussian interference channel
AU - Koyluoglu, Onur Ozan
AU - Gamal, Hesham El
AU - Lai, Lifeng
AU - Poor, H. Vincent
PY - 2008
Y1 - 2008
N2 - This paper studies the K-user Gaussian interference channel with secrecy constraints. Two distinct network models, namely the interference channel with confidential messages and the one with an external eavesdropper, are analyzed. Using interference alignment along with secrecy pre-coding at each transmitter, it is shown that each user in the network can achieve non-zero secure Degrees of Freedoms (DoFs) in both scenarios. In particular, the proposed coding scheme achieves K - 2/2K - 2 secure DoFs for each user in the interference channel with confidential messages model, and K - 2/2K - 2 secure DoFs in the case of an external eavesdropper. The fundamental difference between the two scenarios stems from the lack of channel state information (CSI) about the external eavesdropper. Remarkably, the results establish the positive impact of interference on the secrecy capacity of wireless networks.
AB - This paper studies the K-user Gaussian interference channel with secrecy constraints. Two distinct network models, namely the interference channel with confidential messages and the one with an external eavesdropper, are analyzed. Using interference alignment along with secrecy pre-coding at each transmitter, it is shown that each user in the network can achieve non-zero secure Degrees of Freedoms (DoFs) in both scenarios. In particular, the proposed coding scheme achieves K - 2/2K - 2 secure DoFs for each user in the interference channel with confidential messages model, and K - 2/2K - 2 secure DoFs in the case of an external eavesdropper. The fundamental difference between the two scenarios stems from the lack of channel state information (CSI) about the external eavesdropper. Remarkably, the results establish the positive impact of interference on the secrecy capacity of wireless networks.
UR - http://www.scopus.com/inward/record.url?scp=52349105722&partnerID=8YFLogxK
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U2 - 10.1109/ISIT.2008.4595013
DO - 10.1109/ISIT.2008.4595013
M3 - Conference contribution
AN - SCOPUS:52349105722
SN - 9781424422579
T3 - IEEE International Symposium on Information Theory - Proceedings
SP - 384
EP - 388
BT - Proceedings - 2008 IEEE International Symposium on Information Theory, ISIT 2008
T2 - 2008 IEEE International Symposium on Information Theory, ISIT 2008
Y2 - 6 July 2008 through 11 July 2008
ER -