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首页> 外文期刊>Information Theory, IEEE Transactions on >Achieving Long-Term Fairness and Optimum Multiuser Diversity Gain in Time-Varying Broadcast Channels
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Achieving Long-Term Fairness and Optimum Multiuser Diversity Gain in Time-Varying Broadcast Channels

机译：在时变广播频道中实现长期公平性和最佳多用户分集增益

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摘要

In this paper, a downlink system in which a single-antenna base station communicates with k single antenna users over a time-correlated fading channel is considered. It is assumed that each receiver knows its own channel state, while the rate of the channel variation for all users and the corresponding initial fading gains are known to the base station. The average (per channel use) throughput of the system is studied by applying various adaptive signaling schemes. Assuming a large number of users in the system, it is shown that using a scheduling scheme in which the base station transmits to the user with the maximum initial fading gain, while using a fixed codeword length for all users, achieves the order of the maximum throughput. Moreover, an alternative scheduling scheme is proposed (by accounting for users' delays) and shown to achieve the optimum long-term fairness, while preserving the order of the maximum throughput.
机译：在本文中，考虑了一种下行链路系统，其中单天线基站通过时间相关的衰落信道与k个单天线用户进行通信。假定每个接收机都知道自己的信道状态，而所有用户的信道变化率和相应的初始衰落增益对于基站都是已知的。通过应用各种自适应信令方案来研究系统的平均（每通道使用）吞吐量。假设系统中有大量用户，则表明使用一种调度方案，其中基站以最大的初始衰落增益向用户发送，同时对所有用户使用固定的码字长度，可以达到最大阶数。吞吐量。此外，提出了另一种调度方案（通过考虑用户的延迟），该方案显示出最佳的长期公平性，同时保留了最大吞吐量的顺序。

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