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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

A Rate-Two Full Diversity Space-Time-Frequency Block Code (STFBC) for 4-Tx MIMO-OFDM Systems
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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. 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,, receiver antenna Mr 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.
作者 麻清华 杨绿溪 何振亚
机构地区 东南大学信息科学与工程学院
出处 《应用科学学报》 CAS CSCD 北大核心 2007年第6期589-593,共5页 Journal of Applied Sciences
基金 国家"973"重点基础研究发展计划项目(2007CB310603) 国家自然科学基金(60672093) 国家重大基金(60496310) 国家"863"高技术研究发展计划项目(2007AA01Z262) 江苏省自然科学基金(BK2005061)资助项目
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 space time frequency block coding （STFBC） diversity orthogonal frequency division multiplexing frequency-selective fading
分类号 TN911.5 [电子电信—通信与信息系统]
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参考文献9

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二级参考文献18

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应用科学学报
2007年 第6期

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