北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2009, Vol. 32 ›› Issue (2): 85-88.doi: 10.13190/jbupt.200902.85.dongy

• 研究报告 • 上一篇    下一篇

准正交空时分组码的自适应设计

董宇 赵慧 刘洋 王文博   

  1. 北京邮电大学电信工程学院 北京邮电大学电信工程学院 北京邮电大学电信学院 北京邮电大学电信学院
  • 收稿日期:2008-09-19 修回日期:2008-12-23 出版日期:2009-04-28 发布日期:2009-04-28
  • 通讯作者: 董宇

Adaptive Design for Quasi-Orthogonal Space-Time Block Codes

  • Received:2008-09-19 Revised:2008-12-23 Online:2009-04-28 Published:2009-04-28

摘要:

为了能在满足空时分组码完全分集的同时尽可能降低译码复杂度,提出了准正交空时分组码的自适应设计方案. 在准正交空时分组码的编码结构上添加自适应系数,根据当前信道状态信息计算自适应系数的具体数值. 设计的目的是保证传输的数据符号之间相互正交,彼此没有干扰,从而实现完全分集,并能采用复杂度低的单符号译码方法. 仿真结果表明,准正交空时分组码自适应方案的误码率性能要明显好于采用星座旋转的准正交空时分组码方案,只需要采用有限反馈的方法就能实现近似理想反馈的误码率性能.

关键词: 准正交空时分组码, 自适应, 完全分集, 单符号译码, 有限反馈

Abstract:

To achieve full diversity and decrease decoding complexity, an adaptive design for quasiorthogonal spacetime block codes is proposed. Known of channel state information, the adaptive parameter can be calculated, and the input symbols can be coded in the designed structure. With the particular spacetime codes structure, symbols on different antenna are orthogonal to each other, and the received symbols can be singlesymbol decoded. Simulation shows that the adaptive scheme has obvious advantage compared with constellation rotation scheme. The limited feedback scheme is feasible and has almost the same optimal performance as the ideal full feedback scheme.

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