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We consider the Gaussian wiretap channel, where two legitimate players Alice and Bob communicate over an additive white Gaussian noise (AWGN) channel, while Eve is eavesdropping, also through an AWGN channel. We propose a coding strategy based on lattice coset encoding. We define the secrecy gain as a design criterion for wiretap lattice codes, expressed in terms of the lattice theta series, which...
In this paper we consider the problem of a two-user multiple-access channel that is different from the conventional one. We require the receiver to provide only a reliable information-mixture of the incoming messages from the two users, not the exact contents. The minimum rate of such mixture is termed the minimal description rate of the channel output. Answers to this problem have many potential...
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