| 慢变平坦衰落信道下空时码设计准则的改进 |
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| 引用本文： | 张坚强,李道本. 慢变平坦衰落信道下空时码设计准则的改进[J]. 电路与系统学报, 2004, 9(4): 13-16 |
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| 作者姓名： | 张坚强 李道本 |
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| 作者单位： | 北京邮电大学 信息工程学院,北京,100876 |
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| 基金项目： | 国家自然科学基金重大项目资助课题(69931050) |
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| 摘 要： | 对用于慢变平坦瑞利衰落信道的空时码设计准则进行了研究。考察了不同长度的首事件差错概率，并基于这些概率推出误帧率的上界，进而提出一种使误帧率的上界最小化的新准则。另外，证明了空时码的几何一致性并使用该特性大大地减少了空时码搜索的复杂度。依据该准则搜索得到一些新码，并与现有好码进行性能比较。
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| 关 键 词： | 空时码 首事件差错概率 误帧率 慢变平坦瑞利衰落信道 |
| 文章编号： | 1007-0249(2004)04-0013-04 |
| 修稿时间： | 2003-02-28 |
Improvement of Design Criterion of Space-time Code for Slow Flat Fading Channels |
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| ZHANG Jian-qiang,LI Dao-ben. Improvement of Design Criterion of Space-time Code for Slow Flat Fading Channels[J]. Journal of Circuits and Systems, 2004, 9(4): 13-16 |
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| Authors: | ZHANG Jian-qiang LI Dao-ben |
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| Abstract: | The design criterion for space-time coded (STC) slow flat Rayleigh fading channels is investigated. The probabilities of first-event errors with different lengths are evaluated, and based on these probabilities a new criterion is proposed to minimize the upper bound of frame error ratio (FER). Furthermore, geometrical uniformity of STC is utilized to reduce the complexity of code searching greatly. According to the new criterion, some new QPSK STCs are found and the performance comparisons with some existing codes are presented. |
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| Keywords: | space-time code first-event error probability frame error ratio slow flat Rayleigh fading channel |
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