Power allocation strategies across N orthogonal channels for singe-relay networks at both source and relay

Y. Ko, M. Ardakani, S. Vorobyov
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引用次数: 1

Abstract

We consider a wireless relay network with one source, one relay and one destination, where communications between nodes are preformed over N orthogonal channels. This, for example, is the case when orthogonal frequency division multiplexing is employed for data communications. Since the power available at the source and relay is limited, we study optimal power allocation strategies at the source and relay in order to maximize the overall source-destination capacity. Depending on the availability of the channel state information at both the source and relay or only at the relay, power allocation is performed at both the source and relay or only at the relay. Considering different setups for the problem, various optimization problems are formulated and solved. Some properties of the optimal solution are also proved.
单中继网络中N个正交信道的功率分配策略
我们考虑一个具有一个源、一个中继和一个目的地的无线中继网络,其中节点之间的通信通过N个正交信道进行。例如,当数据通信采用正交频分复用时就是这种情况。由于源端和中继端的可用功率是有限的,为了使源端和中继端的总容量最大化,我们研究了源端和中继端的最优功率分配策略。根据信道状态信息在源端和中继端的可用性或仅在中继端的可用性,在源端和中继端或仅在中继端执行功率分配。针对问题的不同设置,制定并求解了各种优化问题。并证明了最优解的一些性质。
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