| 基于TOFS的宽带信号波束空间DOA估计 |
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| 引用本文： | 谢坚,陈莹莹.基于TOFS的宽带信号波束空间DOA估计[J].电子科技,2012,25(6):60-63,74. |
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| 作者姓名： | 谢坚 陈莹莹 |
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| 作者单位： | (西安电子科技大学 电子工程学院,陕西 西安 710071) |
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| 摘 要： | 频域子空间正交性测试(TOFS)方法是宽带信号DOA估计的一类重要算法。TOFS无需进行聚焦,避免了角度的预估计,在中等信噪比时性能较优,但该方法信噪比门限较高。文中利用均匀线阵模型,将波束空间方法应用于TOFS算法,在降低分辨信噪比门限的同时减少了TOFS算法的运算复杂度。通过仿真验证了新方法性能优于TOFS算法。
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| 关 键 词： | TOFS 波束空间 DOA估计 |
TOFS-based Beam Space Wideband DOA Estimator |
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| XIE Jian,CHEN Yingying.TOFS-based Beam Space Wideband DOA Estimator[J].Electronic Science and Technology,2012,25(6):60-63,74. |
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| Authors: | XIE Jian CHEN Yingying |
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| Affiliation: | (School of Electronic Engineering,Xidian University,Xi'an 710071,China) |
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| Abstract: | Test of orthogonality of frequency subspace(TOFS) is an important method for wideband signal direction-of-arrival(DOA) estimation.Since TOFS avoids focusing operation and preliminary DOA estimation,its performance is better than other methods in middle signal-to-noise ratio(SNR) ranges.However,the SNR resolution threshold for TOFS is higher than others.An improvement based on beam space method is proposed to reduce the SNR threshold and computational complexity.Simulation results show that the proposed method has better performance than TOFS algorithm. |
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| Keywords: | TOFS beam space DOA estimation |
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