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MIMO-OFDM系统的信道盲估计算法

Blind Channel Identification in MIMO-OFDM Systems
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摘要 正交频分复用(OFDM)在宽带多天线通信系统中的使用显著地降低了接收端设计的复杂度,接收端信号经过OFDM调制后能将有限冲激响应信道的识别简化为一系列的无记忆系统识别问题。采用盲信源分离算法在频域中对信道进行盲估计,并利用相邻子载波间信号在时间上的相关性,消除多天线系统盲信道估计中幅度和排列识别模糊问题。该算法不需要在发送数据中插入导频和训练序列,提高了系统的频带利用率。 Orthogonal Frequency Division Multiplexing(OFDM)significantly reduces the complexity of the receiver in wirelesss broadband systems.It has recently been used in wireless broadband multiantenna systems.The OFDM modulation simplifies the finite-impulse-response channel estimation into several memoryless systems.The proposed method uses BSS in each subcarrier to indentify the channel in the frequency domain.The source order and scaling indeterminacies inherent to BSS methods are overcome by exploiting the cross correlation between the subcarriers introduced by convolutional encoding.We assume that the channels are unknown and training sequences are not sent.
作者 吕鑫 吕振肃 靳天玉
机构地区 兰州大学信息科学与工程学院
出处 《电子科技大学学报》 EI CAS CSCD 北大核心 2007年第S2期1051-1053,共3页 Journal of University of Electronic Science and Technology of China
关键词 信道估计 正交频分复用 联合近似特征矩阵对角化算法 多输入多输出 blind channel identification frequency division multiplexing joint approximate diagonalization of eigen-matrices multi-input multi-output
分类号 TN919.3 [电子电信—通信与信息系统]
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参考文献9

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共引文献210

电子科技大学学报
2007年 第S2期

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