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首页> 外文期刊>IEEE Transactions on Communications >On Power Allocation and Relay Selection for a Two-Way Amplify-and-Forward Relaying System
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On Power Allocation and Relay Selection for a Two-Way Amplify-and-Forward Relaying System

机译：两路放大转发中继系统的功率分配和中继选择

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摘要

In this paper, we investigate power allocation and relay selection problems for a two-way amplify-and-forward (AF) relaying system. We first derive asymptotic overall symbol error probabilities (AOSEPs) for the case of one relay cooperating with two sources with respect to the second-order channel statistics for both M-ary quadrature amplitude modulation (M-QAM) and M-ary phase-shift keying (M-PSK), and then present the corresponding optimal power allocation and relay selection schemes that minimize the AOSEPs. To achieve the full diversity order, we further propose alternative power allocation and relay selection methods by simply replacing the statistical channel information of the first scheme with instantaneous one. The diversity order of the second scheme is then verified by deriving the lower and upper bounds of the corresponding asymptotic overall outage probability. Computer simulation results are also given to support the analytical results.
机译：在本文中，我们研究了双向放大转发（AF）中继系统的功率分配和中继选择问题。对于一个中继与两个源协作的情况，我们首先得出关于M元正交幅度调制（M-QAM）和M元相移的二阶信道统计量的渐近总体符号错误概率（AOSEP）键控（M-PSK），然后提出使AOSEP最小化的相应最佳功率分配和中继选择方案。为了达到全分集阶数，我们进一步提出了一种替代性的功率分配和中继选择方法，即简单地将第一种方案的统计信道信息替换为瞬时方案。然后，通过推导相应渐近总体中断概率的下限和上限来验证第二种方案的分集阶数。还给出了计算机仿真结果以支持分析结果。

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