首页> 外文会议>2010 International ITG Workshopn Smart Antennas >A combined time-frequency domain beamforming method for OFDM systems
【24h】

A combined time-frequency domain beamforming method for OFDM systems

机译:OFDM系统的时频组合波束形成方法

获取原文
获取原文并翻译 | 示例

摘要

To suppress co-channel interferences in OFDM systems two main schemes namely, the pre-FFT and the post-FFT schemes have been proposed. While pre-FFT is a time-domain beamforming method, post-FFT uses beamforming in frequency domain to suppress directional interferences. It is generally believed that the post-FFT scheme is superior in performance than the pre-FFT method. In this study we first compare these two schemes in pilot-assisted OFDM systems under different channel and system conditions. It is shown that each of these methods shows better performance in a different condition. To take advantage of the strategy of each method, a combined time-frequency method is proposed which produces better results than each of the individual methods while its computational complexity is not much increased compared to the post-FFT scheme. The simple structure of the combined method makes it a suitable choice for interference suppression in the receiver of OFDM systems in practice.
机译:为了抑制OFDM系统中的同信道干扰,已经提出了两种主要方案,即前FFT方案和后FFT方案。前FFT是时域波束成形方法,而后FFT在频域中使用波束成形来抑制方向性干扰。通常认为,后FFT方案的性能优于前FFT方法。在这项研究中,我们首先在不同信道和系统条件下的导频辅助OFDM系统中比较这两种方案。结果表明,这些方法中的每一种在不同条件下均显示出更好的性能。为了利用每种方法的策略,提出了一种时频组合方法,该方法产生的效果比每种方法都好,但与后FFT方案相比,其计算复杂度却没有太大提高。实际上,组合方法的简单结构使其成为OFDM系统接收机中抑制干扰的合适选择。

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