Outage Probability Analysis and Power Allocation for Two-Way Relay Networks with User Selection and Outdated Channel State Information
Outage Probability Analysis and Power Allocation for Two-Way Relay Networks with User Selection and Outdated Channel State Information
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DOI：
10.1109/lcomm.2012.031212.112448
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发表时间：
2012-03
期刊：
影响因子：
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通讯作者：
Lisheng Fan;Xianfu Lei;P. Fan;R. Hu
中科院分区：
文献类型：
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作者：
Lisheng Fan;Xianfu Lei;P. Fan;R. Hu
研究了一个多用户双向中继网络（TWRN），该网络由一个基站（BS）、一个放大转发（AF）中继和K个移动的站（MS）组成，并选择其中的第N个最佳MS与BS进行信息交换。具体来说，我们研究过时的信道状态信息（CSI）的系统在时变瑞利块衰落信道的影响，推导出一个紧密的封闭形式的中断概率的下界。我们还得到了一个渐近中断概率表达式的高信噪比（SNR）。此外，通过最小化渐近中断概率，我们优化网络节点之间的功率分配（PA）。数值和模拟结果合作所提出的研究。
This paper considers a multiuser two-way relay network (TWRN) consisting of one base station (BS), one amplify-and-forward (AF) relay and K mobile stations (MSs) among which the Nth-best MS is selected to exchange information with the BS. Specifically, we study the impact of outdated channel state information (CSI) on the system over time-varying Rayleigh block-fading channels by deriving a tight closed-form lower bound for the outage probability. We also obtain an asymptotic outage probability expression for high signal-to-noise ratio (SNR). Moreover, by minimizing the asymptotic outage probability, we optimize the power allocation (PA) among the network nodes. Numerical and simulation results collaborate the proposed studies.