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We consider a Gaussian multiple-access relay channel with multiple sources, a relay and a destination. We assume that the received signals at the relay and the destination from different nodes are orthogonal. Additionally, we assume that the relay performs an instantaneous mapping to compress all received signals from different sources into one output symbol. We refer to this as analog network coding...
We study the three-node Gaussian relay channel consisting of a source, a relay and a destination. We assume that the relay is memoryless, i.e., the transmitted signal from the relay depends only on the currently received signal. Additionally, we focus on dimension expansion relaying, where the relay has access to more channel uses for retransmission. We use the end-to-end mutual information to numerically...
We consider the multiple-access relay channel with two source nodes, one relay node and one destination node. For practical simplicity, we consider orthogonal transmission of the source messages and half-duplex relaying. Further, we assume that the relay is memoryless and is implemented based on a two-to-one deterministic mapping. Essentially the proposed mappings combine the two incoming analog signals...
We study the problem of optimal design of relay mappings for the Gaussian relay channel in order to maximize the reliable transmission rate. We consider both Gaussian and modulation constrained signaling at the source. To optimize the relay mapping, we use an iterative integral equation as a necessary condition for optimality. The optimized relay mappings demonstrate significant rate improvement over...
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