J4 ›› 2009, Vol. 36 ›› Issue (4): 649-654.

• 研究论文 • 上一篇    下一篇



  1. (1. 西安电子科技大学 综合业务网理论及关键技术国家重点实验室,陕西 西安  710071;
    2. 中国空间技术研究院 总体部,北京  100094)
  • 收稿日期:2008-08-31 出版日期:2009-08-20 发布日期:2009-09-28
  • 通讯作者: 黑永强
  • 基金资助:


Beamforming detector for group space-time coded systems

HEI Yong-qiang1;LI Xiao-hui1;YI Ke-chu1;YANG Hong2   

  1. (1. State Key Lab. of Integrated Service Networks, Xidian Univ., Xi'an  710071, China;
    2. Chinese Academy of Space Tech. Quality Tech. Dept., Beijing  100094, China)
  • Received:2008-08-31 Online:2009-08-20 Published:2009-09-28
  • Contact: HEI Yong-qiang



关键词: 波束成形, 分组空时编码, 波束选择, 分集增益


According to the characteristic of group space-time coded systems, a new detecting algorithm based on beamforming is proposed. By utilizing the unitary matrix, the transmitter decouples the input signal into spatial orthogonal beam directions with the matched filters in beam directions in the receiver, and the gain obtained by each data block can be equivalent to the sum of the projection from the channel matrix to the corresponding beam directions. Beam selection is adopted to maximize the minimum gains of all the blocks, which can improve the system diversity gain efficiently. Moreover, a multiple-rate group space-time coded scenario is presented. Theoretical analysis and simulation results reveal that the proposed algorithm has a better capacity and error performance with lower decoding complexity.

Key words: beamforming, group space-time code, beam selection, diversity gain


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