| 一种用于准静态瑞利衰落信道的空时码设计 |
| |
| 引用本文： | 张坚强,李道本.一种用于准静态瑞利衰落信道的空时码设计[J].重庆邮电学院学报(自然科学版),2003,15(3):84-87,91. |
| |
| 作者姓名： | 张坚强 李道本 |
| |
| 作者单位： | 北京邮电大学信息工程学院 北京100876
(张坚强)，北京邮电大学信息工程学院 北京100876(李道本) |
| |
| 基金项目： | 国家自然科学基金重大项目资助课题 ( 6993 10 5 0 ) |
| |
| 摘 要： | 对准静态瑞利衰落信道的空时码设计准则进行了研究。考察了不同差错路径长度的首事件差错概率，这些概率由不同差错路径长度的码字对之间构成的矩阵的最小行列式决定，综合考虑这些最小行列式，提出一种新准则，使这些最小行列式的和最大化。另外，证明了空时码的几何一致性并使用该特性大大地浅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对比。状态数目更多且／或使用更多发射天线的空时码也可以依据该准则进行搜索。
|
| 关 键 词： | 空时码 首事件差错概率 准静态瑞利衰落信道 |
A Design of Space-Time Code for Quasistatic Rayleigh Fading Channels |
| |
| ZHANG Jian-qiang,LI Dao-ben.A Design of Space-Time Code for Quasistatic Rayleigh Fading Channels[J].Journal of Chongqing University of Posts and Telecommunications(Natural Sciences Edition),2003,15(3):84-87,91. |
| |
| Authors: | ZHANG Jian-qiang LI Dao-ben |
| |
| Abstract: | The design criterion of space-time code(STC) for quasistatic Rayleigh fading channels is investigated. The probabilities of first-event errors with different lengths are evaluated, which are determined by the minimum determinants of all matrices constructed from pairs of distinct codewords with different lengths. A new criterion maximizing the sum of these minimum determinants is proposed. Furthermore, geometrical uniformity of STC is utilized to reduce the complexity of code search greatly. According to the new criterion, some new QPSK STCs are found and the performance comparisons with some existing codes are presented. The new criterion can also be suitably applied to more complex codes with more states and/or more transmit antennas. |
| |
| Keywords: | space-time code first-event error probability quasistatic Rayleigh fading channel |
| 本文献已被 CNKI 维普 等数据库收录！ |
