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STC-OFDM系统的post-IDFT多波束形成技术

刘洪武 冯全源

刘洪武, 冯全源. STC-OFDM系统的post-IDFT多波束形成技术[J]. 西南交通大学学报, 2007, 20(5): 604-610.
引用本文: 刘洪武, 冯全源. STC-OFDM系统的post-IDFT多波束形成技术[J]. 西南交通大学学报, 2007, 20(5): 604-610.
LIU Hongwu, FENG Quanyuan. Post-IDFT Multidimensional Beamforming for STC-OFDM Systems[J]. Journal of Southwest Jiaotong University, 2007, 20(5): 604-610.
Citation: LIU Hongwu, FENG Quanyuan. Post-IDFT Multidimensional Beamforming for STC-OFDM Systems[J]. Journal of Southwest Jiaotong University, 2007, 20(5): 604-610.

STC-OFDM系统的post-IDFT多波束形成技术

详细信息
    作者简介:

    刘洪武(1975- ),男,博士研究生,研究方向为空时编码,电话:028-87601143,E-mail:lhwbrike@163.com

Post-IDFT Multidimensional Beamforming for STC-OFDM Systems

  • 摘要: 提出了适用于空时编码-正交频分复用(OFDM)系统的后-逆离散傅立叶变换(post-IDFT)多波束形成技术.该技术通过对空频信道相关矩阵进行特征分解获得多个特征模式,再利用空时分组码(STBC)各发射分支信号的正交性使OFDM系统形成多个post-IDFT波束.接收端根据STBC传输矩阵的正交性对多波束解码.系统获得的空间分集增益为空频信道相关矩阵的特征值之和,最大空间分集增益与子载波波束形成方案相同,误码率比STC-OFDM的低.该技术将复杂度降低到子载波波束形成方案的1/S(S为OFDM系统的子载波数目),而且当波束维数(m)小于发射天线数目(M)时,可进一步减少M-m个IDFT模块

     

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出版历程
  • 收稿日期:  2006-06-29
  • 刊出日期:  2007-10-25

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