• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>2010 IEEE International Symposium on Broadband Multimedia Systems and Broadcasting (BMSB 2010) >Performance analysis of OFDMA uplink synchronization based on phase shift of channel responses between adjacent subcarriers
【24h】

Performance analysis of OFDMA uplink synchronization based on phase shift of channel responses between adjacent subcarriers

机译：基于相邻子载波之间信道响应相移的OFDMA上行同步性能分析

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

Time offset estimation is one of the main tasks of the initial ranging process in orthogonal frequency-division multiple access (OFDMA)-based network. Recently, the multiuser time offset estimation based on phase shift over adjacent subcarriers has been presented. This method can reduce the huge computation complexity of the timing recovery based on peak correlation searching of long PN codes. The performance of this multiuser uplink synchronization method under the multipath fading environment is investigated in this paper. Specifically, the dependence of time offset estimation error on subcarrier spacing, SNR and frequency selectivity of the channel impulse response is studied. Simulation results show that with the increase of subcarrier spacing, the accuracy of time offset estimation will be improved. However, the maximum time offset delay to be estimated will be reduced. Furthermore, this method is very sensitive to SNR when the subcarrier spacing is small and the accuracy of time offset estimation will be reduced with the increasing of multipath delay spread.
机译：在基于正交频分多址（OFDMA）的网络中，时间偏移估计是初始测距过程的主要任务之一。最近，已经提出了基于相邻子载波上的相移的多用户时间偏移估计。这种方法可以减少基于长PN码的峰值相关性搜索的定时恢复的巨大计算复杂性。本文研究了在多径衰落环境下这种多用户上行同步方法的性能。具体地，研究了时间偏移估计误差对子载波间隔，信噪比和信道脉冲响应的频率选择性的依赖性。仿真结果表明，随着子载波间隔的增加，时移估计的精度将会提高。但是，将减少要估计的最大时间偏移延迟。此外，当子载波间隔较小时，该方法对SNR非常敏感，并且随着多径延迟扩展的增加，时间偏移估计的精度将降低。

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