• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Communications, IET >Rateless space–time block code for mitigating pilot contamination effects in multi-cell massive MIMO system with lossy links
【24h】

Rateless space–time block code for mitigating pilot contamination effects in multi-cell massive MIMO system with lossy links

机译：无速率空时分组码，用于减轻具有损耗链路的多小区大规模MIMO系统中的导频污染影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Massive multiple-input multiple-output (MIMO) is a breakthrough wireless transmission technique proposed for future wireless standards due to its spectrum and energy efficiencies. However, pilot contamination constitutes a particularly significant impairment in multi-cell systems that utilise reciprocity-based channel estimation. This phenomenon results from the non-orthogonality of the pilot sequences in different cells. Given a large number of antennas employed in massive MIMO systems, conventional channel estimation schemes cannot mitigate this problem effectively without high computational complexity. In this study, a simple rateless space-time block code (RSTBC) is employed in the downlink transmission of a lossy multi-cell massive MIMO system to mitigate the effects of signal-to-interference-and-noise ratio (SINR) degradation resulting from pilot contamination. Specifically, a robust optimisation problem is formulated to maximise the minimum downlink SINR among all users. Simulation and analytical results for large numbers of antenna elements at the base station (BS) are provided to demonstrate the usefulness of the proposed scheme. The SINR and spectral efficiency analyses indicate that RSTBC can effectively mitigate downlink SINR degradation that is caused by pilot contamination. Experimental results for the proposed scheme are also included for a 2 × 2 MIMO system, and it agrees closely with the simulation.
机译：大规模多输入多输出（MIMO）是一种突破性的无线传输技术，由于其频谱和能源效率而被提议用于未来的无线标准。然而，在利用基于互易性的信道估计的多小区系统中，导频污染构成特别严重的损害。这种现象是由于不同小区中导频序列的非正交性引起的。给定大规模MIMO系统中使用的大量天线，如果没有很高的计算复杂度，常规的信道估计方案就无法有效地缓解这一问题。在这项研究中，在有损多小区大规模MIMO系统的下行链路传输中采用了一种简单的无速率空时分组码（RSTBC），以减轻信号干扰噪声比（SINR）降低所产生的影响来自飞行员的污染。具体而言，制定了鲁棒的优化问题以使所有用户之间的最小下行链路SINR最大化。提供了针对基站（BS）上大量天线元件的仿真和分析结果，以证明所提出方案的有用性。 SINR和频谱效率分析表明，RSTBC可以有效减轻由导频污染引起的下行SINR下降。该方案的实验结果也包括在2×2 MIMO系统中，与仿真非常吻合。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号