| MIMO系统中信道估计与序列联合检测 |
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| 引用本文： | 张永健,王东昱. MIMO系统中信道估计与序列联合检测[J]. 太原理工大学学报, 2011, 42(6): 559-562 |
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| 作者姓名： | 张永健 王东昱 |
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| 作者单位： | 1. 国际关系学院信息科技系,北京,100091
2. 北方工业大学信息工程学院,北京,100041 |
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| 基金项目： | 国家自然科学基金，北方工业大学青年重点科研基金 |
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| 摘 要： | 提出了MIMO系统中基于EM(Expectation Maximization)-SD(Sphere Decoding)相结合的信道估计和检测的联合处理算法。在采用EM-SD算法进行联合处理时,首先通过观测数据、训练序列及以前估计的符号对信道信息进行更新,随后把更新后的信道信息及观测数据重新送入SD算法中进行最小距离搜索,从而可以估计发送符号。仿真显示:这种联合估计及检测算法的性能属于次优算法,但是其复杂度会随着搜索而下降。在比较少的迭代次数下,可以获得理想的信道估计和检测结果。
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| 关 键 词： | MIMO EM迭代算法 SD算法 训练序列 完备数据 |
Joint Channel Estimation and Detection under MIMO System |
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| ZHANG Yong-jian,WANG Dong-yu. Joint Channel Estimation and Detection under MIMO System[J]. Journal of Taiyuan University of Technology, 2011, 42(6): 559-562 |
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| Authors: | ZHANG Yong-jian WANG Dong-yu |
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| Affiliation: | ZHANG Yong-jian1,WANG Dong-yu2 (1.College of Information Engineering,North China University of Technology,Beijing 100091,China,2.Department of Information Science and Technology,University of International Relations,Beijing 100041,China) |
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| Abstract: | This paper presents a method for joint channel estimation and symbol detection by using EM(Expectation-Maximization)-SD(Sphere Decoding) joint algorithm under MIMO system.EM-SD method can work iteratively by two steps: the first step,EM uses the previous estimate of the data symbols and the new observations to update the channel information;the second step,the renewed channel estimation uses the improved sphere decoding algorithm to recover the transmitted symbols.Simulations show that EM-SD method is a kin... |
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| Keywords: | MIMO EM iterative algorithm SD algorithm Training sequence complete Data |
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