• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>The 17th Asia-Pacific Conference on Communications >On performance of cooperative OFDM/TDM with frequency-domain equalization in a multipath wireless channel
【24h】

On performance of cooperative OFDM/TDM with frequency-domain equalization in a multipath wireless channel

机译：多径无线信道中频域均衡的OFDM / TDM协作性能研究

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

Cooperative transmission, where spatially distributed users form a multi-antenna system and assist in forwarding the information from source to destination node, achieves the diversity gain of a multiple-input multiple-output (MIMO) system. Cooperative network based on OFDM has been proposed to cope with the channel frequency-selectivity but due to high peak-to-average power ratio (PAPR) of OFDM, expensive power amplifier are required. In this paper, we present cooperative network based on OFDM combined with time division multiplexing (OFDM/TDM) using minimum mean square error frequency-domain equalization (MMSE-FDE) in a frequency-selective fading channel. We theoretically analyze the network performance with respect to the bit error rate (BER). The conditional signal-to-interference plus noise ratio (SINR) expressions are derived based on Gaussian approximation of the residual inter-slot interference (ISI) after MMSE-FDE for the given set of channel gains. The average BER performance for OFDM/TDM is evaluated by Monte-Carlo numerical computation method using the derived theoretical expressions and confirmed by computer simulation. The results show that the lower BER is achieved with cooperative OFDM/TDM in comparison with OFDM based cooperative network because OFDM/TDM exploits both cooperative and frequency diversity gains.
机译：在空间分布的用户形成多天线系统并协助将信息从源节点转发到目标节点的协作传输中，实现了多输入多输出（MIMO）系统的分集增益。已经提出了基于OFDM的协作网络来应对信道频率选择性，但是由于OFDM的高峰均功率比（PAPR），因此需要昂贵的功率放大器。在本文中，我们提出了一种在频率选择性衰落信道中使用最小均方误差频域均衡（MMSE-FDE）的，基于OFDM结合时分复用（OFDM / TDM）的协作网络。我们从理论上分析有关误码率（BER）的网络性能。对于给定的信道增益集，基于MMSE-FDE之后剩余时隙间干扰（ISI）的高斯近似，可以得出条件性信号干扰加噪声比（SINR）表达式。 OFDM / TDM的平均BER性能通过蒙特卡洛数值计算方法使用推导的理论表达式进行评估，并通过计算机仿真进行确认。结果表明，与基于OFDM的协作网络相比，使用协作OFDM / TDM可以实现更低的BER，因为OFDM / TDM同时利用了协作和频率分集增益。

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