| 基于循环延迟分集的差分空时频编码方案 |
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| 引用本文： | 陈宇燕,张海滨,张红伟.基于循环延迟分集的差分空时频编码方案[J].高技术通讯,2007,17(2):130-134. |
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| 作者姓名： | 陈宇燕 张海滨 张红伟 |
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| 作者单位： | 上海交通大学,电子工程系,上海,200240 |
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| 基金项目： | 国家高技术研究发展计划(863计划)
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国家自然科学基金 |
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| 摘 要： | 结合正交空时码的分集优势,将正交空时码应用到差分空频系统中,提出了一种基于循环延迟分集的多流差分空时频编码新方法,在差分系统中同时获得了空间和频率分集.该差分编码方法在满足信道的时间和频率选择性前提下,只需要发送很少的参考矩阵用于非相干检测.仿真结果表明,正交空时码的引入,可以有效提高整个系统的分集增益,从而在很大程度上改善整个差分MIMO-OFDM系统的误码性能.
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| 关 键 词： | 多输入多输出 正交频分复用 差分空时频 循环延迟分集 |
| 收稿时间： | 2006-01-17 |
| 修稿时间： | 2006-01-17 |
Differential space-time-frequency modulation based on cyclic delay diversity |
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| Chen Yuyan,Zhang Haibin,Zhang Hongwei.Differential space-time-frequency modulation based on cyclic delay diversity[J].High Technology Letters,2007,17(2):130-134. |
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| Authors: | Chen Yuyan Zhang Haibin Zhang Hongwei |
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| Affiliation: | Department of Electronic Engineering, Shanghai Jiaotong University, Shanghai 200240 |
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| Abstract: | A new multistream differential space-time-frequency (DSTF) coding structure was proposed through the combination of orthogonal space time code and CDD based differential space frequency systems, which obtained space-time and space-frequency diversity simultaneously. The structure can well satisfy the time and frequency selectivity of the channel and only need to send a few reference matrix for the differential detection. Based on the simulation in the frequency selective channel, it is concluded that the orthogonal space time code can introduce much more space-time diversity into the differential CDD structure, thus highly improve the error performance of the whole MIMO-OFDM system. |
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| Keywords: | MIMO OFDM differential space-time-frequency(DSTF) cyclic delay diversity(CDD) |
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