| 4根发射天线MIMO-OFDM系统中速率为2的全分集空时频编码设计 |
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| 引用本文： | 麻清华,杨绿溪,何振亚. 4根发射天线MIMO-OFDM系统中速率为2的全分集空时频编码设计[J]. 应用科学学报, 2007, 25(6): 589-593 |
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| 作者姓名： | 麻清华 杨绿溪 何振亚 |
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| 作者单位： | 东南大学,信息科学与工程学院,江苏,南京,210096 |
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| 基金项目： | 国家重点基础研究发展计划(973计划);国家自然科学基金;国家自然科学基金;国家高技术研究发展计划(863计划);江苏省自然科学基金 |
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| 摘 要： | 为了利用频率选择性准静态块衰落的MIMO-OFDM系统中的完全分集度,利用代数空时码和Hadamard变换,给出一种空时频分组码,分集度为发射天线数Mt与接收天线数Mr和准静态块衰落抽头数L的乘积.当发射天线数为4时,这种空时频码符号传输速率能达到2.针对4根发射天线的系统,本文所提出的STFC与其他STFC方案相比,可以在符号传输速率为1的STFC与符号传输速率为4的STFC之间达到一个很好的性能和复杂度折中.实验仿真结果验证了该结论.
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| 关 键 词： | 空时频分组编码 分集 正交频分复用 频率选择性衰落 |
| 文章编号： | 0255-8297（2007）06-0589-05 |
| 修稿时间： | 2006-12-15 |
A Rate-Two Full Diversity Space-Time-Frequency Block Code (STFBC) for 4-Tx MIMO-OFDM Systems |
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| MA Qing-hua,YANG Lu-xi,HE Zhen-ya. A Rate-Two Full Diversity Space-Time-Frequency Block Code (STFBC) for 4-Tx MIMO-OFDM Systems[J]. Journal of Applied Sciences, 2007, 25(6): 589-593 |
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| Authors: | MA Qing-hua YANG Lu-xi HE Zhen-ya |
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| Affiliation: | School of Information Science and Engineering, Southeast University, Nanfing 210096, China |
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| Abstract: | To get full diversity available in the MIMO-OFDM systems with frequency selective quasi-static block fading,the algebraic space-time coding and Hadamard transform are utilized to get a new space-time-frequency block coding(STFBC) to get full diversity.The full diversity is a product of the number of the transmit antenna M_t,receiver antenna M_r and channel taps L in a quasi-static block fading channel.When there are 4 transmitting antennas,the proposed STFBC can reach symbol transmission rate of two.Compared with other STFCs,it makes a good tradeoff between rate-one STFC and rate-four STFC in 4-transmitter MIMO-OFDM systems.Simulation results show validity of our technique. |
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| Keywords: | space time frequency block coding(STFBC) diversity orthogonal frequency division multiplexing frequency-selective fading |
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