Power allocation for OFDM transmisson with DF relaying
Power allocation for OFDM transmisson with DF relaying
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具有 DF 中继的 OFDM 传输的功率分配
DOI：
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发表时间：
2007
期刊：
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通讯作者：
A. Zaidi
中科院分区：
文献类型：
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作者：
L. Vandendorpe;R. T. Duran;J. Louveaux;A. Zaidi
在本文中，我们考虑一个正交频分复用（OFDM）传输方案与中继。由源发送的符号在第二时隙期间可以由中继重传或不重传，中继被假设为解码转发（DF）类型。对于每个载波，目的地实现最大比率合并。在假设信道状态信息（CSI）完备的情况下，研究了该方案中速率最大化的功率分配问题。这两种情况下的总和功率约束，并在源和在继电器的个人功率约束处理。这两种类型的约束的理论分析所示的数值结果。
In this paper we consider an OFDM (orthogonal frequency division multiplexing) transmission scheme with a relay. Symbols sent by the source may or may not be retransmitted during a second time slot by the relay, which is assumed to be of the decode-and-forward (DF) type. For each carrier the destination implements maximum ratio combining. Assuming perfect CSI (channel state information) knowledge the paper investigates the power allocation problem for rate maximization of the scheme. Both cases of a sum power constraint, and of individual power constraints at the source and at the relay are tackled. The theoretical analysis is illustrated by numerical results for both types of constraints.