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Power-Efficient Resource Allocation for Time-Division Multiple Access Over Fading Channels

机译:衰落信道上时分多址的高能效资源分配

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摘要

We investigate resource allocation policies for time-division multiple access (TDMA) over fading channels in the power-limited regime. For frequency-flat block-fading channels and transmitters having full channel state information (CSI), we first minimize power under a weighted sum average rate constraint and show that the optimal rate and time allocation policies can be obtained by a greedy water-filling approach with linear complexity in the number of users. Subsequently, we pursue power minimization under individual average rate constraints and establish that the optimal resource allocation also amounts to a greedy water-filling solution. Our approaches not only provide fundamental power limits when each user can support an infinite-size capacity-achieving codebook (continuous rates), but also yield guidelines for practical designs where users can only support a finite set of adaptive modulation and coding modes (discrete rates).
机译:我们研究功率限制机制中衰落信道上的时分多址(TDMA)资源分配策略。对于频率平坦的块衰落信道和具有完整信道状态信息(CSI)的发射机,我们首先在加权和平均速率约束下最小化功率,并表明可以通过贪婪的注水方法获得最佳速率和时间分配策略用户数量线性复杂。随后,我们追求在单个平均速率约束下的功率最小化,并确定最佳资源分配也相当于贪婪的注水解决方案。我们的方法不仅在每个用户可以支持无限大小的容量实现码本(连续速率)时提供基本功率限制,而且还为实际设计提供指导,其中用户只能支持有限的一组自适应调制和编码模式(离散速率) )。

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