| 一种具有快速译码结构和优化编码增益的全分集空频码 |
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| 引用本文： | 王欣,傅冰,李颖,魏急波.一种具有快速译码结构和优化编码增益的全分集空频码[J].电子与信息学报,2008,30(9):2193-2197. |
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| 作者姓名： | 王欣 傅冰 李颖 魏急波 |
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| 作者单位： | 1. 国防科技大学电子科学与工程学院,长沙,410073
2. 海军工程大学电子工程学院,武汉,430033 |
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| 摘 要： | 本文通过将一个对角空时码乘以一个压缩映射矩阵(Compact Mapping Matrix,CMM)从而得到一个空频码字,在获得空时码原有空间分集性能的基础上可以获得指定阶数的频率分集,从而提高了频率选择性信道下相干空频编码MIMO-OFDM的性能,该文还对码字的编码增益进行了优化,进一步提高了系统性能.同时,利用对角星座的快速译码研究的新成果,该方法设计的码字其译码过程得到了大大的简化,有利于系统的硬件实现.
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| 关 键 词： | 频率选择性衰落信道 空频编码 全分集 |
| 收稿时间： | 2007-1-24 |
| 修稿时间： | 2007-7-16 |
A Full-Diversity Space-Frequency Codes with Fast Decoding Structure and Optimized Coding Gains |
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| Wang Xin,Fu Bin,Li Ying,Wei Ji-bo.A Full-Diversity Space-Frequency Codes with Fast Decoding Structure and Optimized Coding Gains[J].Journal of Electronics & Information Technology,2008,30(9):2193-2197. |
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| Authors: | Wang Xin Fu Bin Li Ying Wei Ji-bo |
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| Affiliation: | (School of Electronic Science and Engineering, National University of Defense Technology Changsha 410073, China) (Naval University of Engineering, Wuhan 430033, China) |
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| Abstract: | Using a Compact Mapping Matrix (CMM) to transform a diagonal space-time coding, a design method for full-diversity space-frequency codes is proposed. Without losing the inherent space diversity of the space-time coding, the proposed space-frequency coding obtains extra frequency diversity provided by the frequency-selective fading channels and improve the performance. Further improvement is obtained by optimizing the coding gains. Exploring the diagonal structure of space-timing coding and the new research results, the proposed codes can be decoded with polynomial complexity. This facilitates the hardware implementation of the system. |
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| Keywords: | MIMO-OFDM |
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