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This paper studies the cooperative communications in wireless systems with ns source nodes, nr relay nodes, and single destination node. The paper proposes cooperative protocols and analyzes the system performance of the cooperation systems. For ns = 1; nr > 1, the nodes cooperate in a repetition way. The impact of the detection error at the relay node on the system performance is analyzed, and then a relay selection protocol is proposed to compensate for such effect. For ns > 1; nr > 1, the paper proposes a cooperative coding protocol, in which the relay nodes not only decode and forward the symbols from the source nodes, but also encode the incoming symbols according to the pre-assigned cooperative code.

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Format:PDFSize:272 KB
Date:Apr 2007
Pages:12

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