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- W1965903274 abstract "We show that the sum secure degrees of freedom (d.o.f.) of the K-user Gaussian multiple access (MAC) wiretap channel is K(K-1)/K(K-1)+1. Our achievability is based on real interference alignment and structured cooperative jamming. Each user divides its message into K - 1 sub-messages, and sends a linear combination of signals carrying these sub-messages together with a structured cooperative jamming signal. All cooperative jamming signals are aligned in a single dimension at the legitimate receiver allowing for reliable decoding of the message carrying signals by the legitimate receiver. Each cooperative jamming signal is aligned with K-1 message signals at the eavesdropper limiting the information leakage rate to the eavesdropper. We provide a matching converse establishing the exact sum secure d.o.f. of the Gaussian MAC wiretap channel as K(K-1)/K(K-1)+1." @default.
- W1965903274 created "2016-06-24" @default.
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- W1965903274 date "2013-07-01" @default.
- W1965903274 modified "2023-10-16" @default.
- W1965903274 title "Secure degrees of freedom of the Gaussian multiple access wiretap channel" @default.
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- W1965903274 doi "https://doi.org/10.1109/isit.2013.6620444" @default.
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