首页> 外文OA文献 >Per-subcarrier antenna selection for OFDMA-based cognitive radio systems
【2h】

Per-subcarrier antenna selection for OFDMA-based cognitive radio systems

机译:基于OFDMA的认知无线电系统的每子载波天线选择

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。

摘要

The performance of an OFDM system can be improved by performing per-subcarrier antenna selection, which facilitates the exploitation of frequency and spatial diversity in the wireless channel. In this paper, we extend the concept of per-subcarrier antenna selection to a multiuser cognitive radio environment and present a practical subcarrier and antenna selection algorithm that exploits the multiuser, frequency and spatial diversities inherent in such systems while requiring only limited channel knowledge. The problem is formulated as an integer programming (IP) problem. We demonstrate that a linear relaxation of the problem still leads to an optimal solution, thus reducing the computational complexity relative to other approaches found in the literature. Simulation results demonstrate that the proposed resource allocation problem leads to an improvement in secondary users' link qualities, compared to a single-input single-output system and, at the same time, limits the interference to the primary user.
机译:OFDM系统的性能可以通过执行每个子载波的天线选择来提高,这有助于开发无线信道中的频率和空间分集。在本文中,我们将每子载波天线选择的概念扩展到多用户认知无线电环境,并提出一种实用的子载波和天线选择算法,该算法可利用此类系统中固有的多用户,频率和空间分集,而仅需要有限的信道知识。该问题被表述为整数编程(IP)问题。我们证明问题的线性松弛仍然导致最优解,从而相对于文献中发现的其他方法降低了计算复杂性。仿真结果表明,与单输入单输出系统相比,所提出的资源分配问题导致二级用户的链路质量得到改善,同时限制了对主要用户的干扰。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

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