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- W2963125765 abstract "In this paper, we study a diamond-relay channel where the source is connected to $M$ relays through orthogonal links and the relays transmit to the destination over a wireless multiple-access channel in the presence of an eavesdropper. The eavesdropper not only observes the relay transmissions through another multiple-access channel but also observes a certain number of source-relay links. The legitimate terminals know neither the eavesdropper’s channel state information nor the location of source-relay links revealed to the eavesdropper except the total number of such links. For this wiretapped diamond-relay channel, we establish the optimal secure d.o.f. In the achievability part, our proposed scheme uses the source-relay links to transmit a judiciously constructed combination of message symbols, artificial noise symbols, and fictitious message symbols associated with secure network coding. The relays use a combination of beamforming and interference alignment in their transmission scheme. For the converse part, we take a genie-aided approach assuming that the location of wiretapped links is known." @default.
- W2963125765 created "2019-07-30" @default.
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- W2963125765 date "2018-11-01" @default.
- W2963125765 modified "2023-09-24" @default.
- W2963125765 title "The Wiretapped Diamond-Relay Channel" @default.
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- W2963125765 doi "https://doi.org/10.1109/tit.2018.2866146" @default.
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