| 基于迭代QR分解的DOA估计技术 |
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| 引用本文： | 杨代明,龚诚,郑世宝.基于迭代QR分解的DOA估计技术[J].航空电子技术,2007,38(1):1-4. |
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| 作者姓名： | 杨代明 龚诚 郑世宝 |
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| 作者单位： | 上海交通大学电子工程系,上海,200030;中国航空无线电电子研究所,上海,200233;中国航空无线电电子研究所,上海,200233;上海交通大学电子工程系,上海,200030 |
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| 摘 要： | 提出了一种基于迭代QR分解的信源到达角(DOA)估计技术.DOA估计的子空间方法主要是通过估计信号协方差矩阵的信号子空间或者噪声子空间来求出信号的DOA参数.估计这些子空间通常需要大量的计算,采用ASIC实现时其成本会非常昂贵.本文采用迭代QR分解方法进行子空间分解,可以利用较少量的计算资源完成处理任务.仿真实验结果达到0.23毫弧度,说明该算法比较可靠有效.
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| 关 键 词： | DOA估计 子空间 迭代QR分解 幂法 |
| 文章编号： | 1006-141X(2007)01-0001-04 |
| 修稿时间： | 2006年12月20 |
DOA Estimation via Iterated QR Decomposition |
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| YANG Dai-ming,GONG Cheng,ZHENG Shi-bao.DOA Estimation via Iterated QR Decomposition[J].Avionics Technology,2007,38(1):1-4. |
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| Authors: | YANG Dai-ming GONG Cheng ZHENG Shi-bao |
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| Abstract: | A Direction of Arrival(DOA)estimation algorithm based on iterative QR decomposition is proposed in this paper.Conventional subspace based algorithms for DOA evaluation estimate the DOA parameters by tracking either the signal subspace or noise subspace of the covariance matrix of the received signal.This approach needs huge volumes of computation,and is hence also very expensive with ASIC implementation.In this paper,the iterative QR decomposition is employed to perform the eigenvalue decomposition(EVD)to obtain the noise subspace of the covariance matrix.It significantly reduces the hardware resource in ASIC implementation.Simulation results indicate that a 0.23mrad estimation accuracy is achieved at a 10dB SNR,and so this approach is effective and reliable. |
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| Keywords: | DOA estimation sunspace iterative QR decomposition power method |
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