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Limited Feedback Design for Multiuser Networks

机译：多用户网络的有限反馈设计

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摘要

In this dissertation, the potential of limited feedback in multiuser/multinode networks is explored, and our goal is to design efficient and practical quantizers to mitigate the perfor- mance loss brought by limited feedback. For the multiple amplify-and-forward relay network, we propose variable-length quantizers (VLQs) with random infinite-cardinality codebooks in contrast to the fixed-length quantizers (FLQs) with finite-cardinality codebooks that cannot attain the full-channel-state-information (full-CSI) performance. We validate through both theoretical proofs and numerical simulations that the proposed VLQs can achieve the full- CSI outage probabilities with finite average feedback rates. We also apply the idea of VLQ to the multicast network, and show that the global VLQ can achieve the minimum full-CSI outage probability with a low average feedback rate. For the two-user interference network where interferences are treated as noise, we introduce the idea of cooperative quantization to allow multiple rounds of feedback communication in the form of conferencing between receivers. For both time-sharing and concurrent transmission strategies, the proposed co- operative quantizers are able to achieve the full-CSI network outage probability of sum-rate and the full-CSI network outage probability of minimum rate, respectively, with only finite average feedback rates. For non-orthogonal multiple access (NOMA) which is recognized as a key technique for 5G, we propose efficient quantizers using variable-length encoding, and prove that in the typical application with two receivers, the losses in the minimum rate and outage probability decay at least exponentially with the minimum feedback rate. In addition, a sufficient condition for the quantizers to achieve the maximum diversity order is provided. For NOMA with K receivers where K > 2, the minimum rate maximization problem is solved within an accuracy of epsilon in time complexity of O(Klog(1/epsilon).
机译：本文探讨了多用户/多节点网络中有限反馈的潜力，我们的目标是设计有效且实用的量化器以减轻有限反馈带来的性能损失。对于多重放大转发中继网络，我们提出了带有随机无限基数密码本的可变长度量化器（VLQ），而带有有限基数密码本的固定长度量化器（FLQ）却无法达到全信道。状态信息（full-CSI）性能。通过理论证明和数值模拟，我们验证了所提出的VLQ能够以有限的平均反馈速率实现CSI完全中断的可能性。我们还将VLQ的概念应用于多播网络，并表明全局VLQ可以以最低的平均反馈率实现最小的全CSI中断概率。对于将干扰视为噪声的两用户干扰网络，我们引入了协作量化的思想，以接收方之间的会议形式进行多轮反馈通信。对于分时和并发传输策略，所提出的协作式量化器能够仅通过有限的平均反馈分别实现总速率的全CSI网络中断概率和最小速率的全CSI网络中断概率。费率。对于公认是5G关键技术的非正交多路访问（NOMA），我们提出了使用可变长度编码的高效量化器，并证明了在具有两个接收器的典型应用中，最小速率损耗和中断概率衰减至少与最小反馈率成指数关系。另外，提供了量化器达到最大分集阶数的充分条件。对于具有K> 2的K个接收器的NOMA，在O（Klog（1 / epsilon））的时间复杂度的epsilon精度内解决了最小速率最大化问题。

著录项

  • 作者

    Lui, Xiaoyi.;

  • 作者单位

    University of California, Irvine.;

  • 授予单位 University of California, Irvine.;
  • 学科 Electrical engineering.
  • 学位 Ph.D.
  • 年度 2017
  • 页码 173 p.
  • 总页数 173
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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