| PN码准正交原则下的MIMO-OFDM系统信道估计 |
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| 引用本文： | 牛德智,陈长兴,王博,卞东亮.PN码准正交原则下的MIMO-OFDM系统信道估计[J].计算机工程与设计,2012,33(9):3342-3346. |
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| 作者姓名： | 牛德智 陈长兴 王博 卞东亮 |
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| 作者单位： | 空军工程大学理学院,陕西西安,710051 |
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| 基金项目： | 陕西省电子信息综合集成重点实验室基金项目(201107Y16);军内武器系统科研基金项目(KJ2010182) |
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| 摘 要： | 研究了多输入多输出-正交频分复用 (multiple input multiple output-orthogonal frequency division multiplexing,MIMO-OFDM)系统的信道估计问题.在分析正交导频估计的基础上,设计多天线上的PN导频分布,提出了准正交原则下的PN码导频信道估计方法,给出了该方法实现信道估计的数学推导过程,分PN码长度大于、等于发射天线数目两种不同情况进行了讨论.仿真实验表明,当PN码长度等于发射天线数目时,所得的信道估计和正交导频信道估计的性能相当；当伪随机序列码(pseudo-noise code,PN)码长度大于发射天线数目时,其信道估计的性能优于正交导频信道估计方法.这为MIMO-OFDM技术在4G通信中应用所要解决的核心问题提供了一种思路.
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| 关 键 词： | MIMO-OFDM(多输入多输出-正交频分复用) 信道估计 正交导频 PN码 4G通信 |
Channel estimation of MIMO-OFDM system based on PN code under quasi-orthogonal regulation |
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| NIU De-zhi
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CHEN Chang-xing
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WANG Bo
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BIAN Dong-liang.Channel estimation of MIMO-OFDM system based on PN code under quasi-orthogonal regulation[J].Computer Engineering and Design,2012,33(9):3342-3346. |
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| Authors: | NIU De-zhi CHEN Chang-xing WANG Bo BIAN Dong-liang |
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| Affiliation: | (Science College,Air-Force Engineering University,Xi’an 710051,China) |
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| Abstract: | Channel estimation(CE) problem of MIMO-OFDM(multiple input multiple output-orthogonal frequency division multiplexing) system is studied.Based on orthogonal pilot method,PN(pseudo-noise code) pilot code’s station is designed and one CE method of PN pilot under quasi-orthogonal regulation is put forward.Mathematic evolvement process how to achieve CE is given.The discussion is done in the case that length of PN code is more than or equal number of transmitting antennas.Simulation results show the method is superior to the orthogonal one,and the method provides a new way which can resolve the key problem for MIMO-OFDM system in the 4th communication. |
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| Keywords: | MIMO-OFDM CE orthogonal pilot PN code 4th communication |
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