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Optimizing dual-hop systems under orthogonal transmission and relay selection schemes

机译:在正交传输和中继选择方案下优化双跳系统

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In this paper, we explore resource optimization problem in dual hop multi-carrier amplify and forward (AF) based relay networks. First, we consider an orthogonal transmission where the source and relay stations transmit information in different time slots. We investigate the joint optimization of subcarrier matching over two hops and the power allocation over different subcarriers at the source and the relay nodes. Although the joint optimization problem under power and subcarrier constraints is a mixed integer programming problem, we propose an efficient solution based on the dual decomposition approach. Then, we present a selection scheme where a single best relay is selected for the dual hop communication. Finally, simulation results are provided to corroborate the proposed studies.
机译:在本文中,我们探讨了基于双跳多载波放大和转发(AF)的中继网络中的资源优化问题。首先,我们考虑正交传输,其中源站和中继站在不同的时隙中传输信息。我们研究了两跳子载波匹配的联合优化,以及源节点和中继节点上不同子载波的功率分配。尽管在功率和子载波约束下的联合优化问题是混合整数规划问题,但我们提出了基于对偶分解方法的有效解决方案。然后,我们提出一种选择方案,其中为双跳通信选择单个最佳中继。最后,提供了仿真结果以证实所提出的研究。

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