计算机科学 ›› 2015, Vol. 42 ›› Issue (9): 78-82.doi: 10.11896/j.issn.1002-137X.2015.09.016
包建东,徐威利,胡伟伟,谢小敏
BAO Jian-dong, XU Wei-li, HU Wei-wei and XIE Xiao-min
摘要： 针对常规子空间类算法在低信噪比、小快拍数情况下分辨力差的问题,分别对信号和噪声子空间提出加权投影算法来加以改善。对于信号子空间,采用主特征值与噪声功率之差的倒数对其特征向量加权；对于噪声子空间,将导向矢量在噪声子空间正交基各元素上的投影值作为权值,对正交基各元素加权。仿真实验表明,这两种算法能有效降低信源分辨的信噪比和快拍数门限,在低信噪比与小快拍条件下具有较好的分辨力和测量精度。
| [1] Haykin S,Reilly J P,Kezys V,et al.Some aspects of array signalprocessing [J].IEE Proceedings Radar and Signal Processing ,1992,139(l):1-26 [2] Krim H,Viberg M.Two decades of array signal processing research:the parametric approach [J].IEEE Signal Processing Magazine,1996,13(4):67-94 [3] Capon J.High-resolution frequency wave-number spectrumanalysis [J].Proceeding of the IEEE,1969,57(8):1408-1418 [4] Schmidt R O.Multiple emitter location and signal parameter estimation [J].IEEE Transactions on Antennas and Propagation,1986,34(3):276-280 [5] Bohme J F.Estimation of source parameters by maximum likelihood and nonlinear regression[C]∥ICASSP.1984,9:271-274 [6] Cadzow J A.A high resolution direction-of-arrival algorithm for narrow-band coherent and incoherent sources [J].IEEE Trans.on ASSP,1988,36(7):965-979 [7] McCloud M L,Scharf L L.A new subspace identification algorithm for high resolution DOA estimation [J].IEEE Trans.on Antenna and Propagation,2002,50(10):1382-1390 [8] Mestr,Lagunas.Modified subspace algorithms for DOA estimation with large arrays [J].IEEE Trans.on Signal Processing,2008,56(2):598-614 [9] 王布宏,王永良,陈辉.利用局域子空间投影提高子空间类DOA估计算法的谱分辨力[J].电子学报,2003,1(3):459-463 Wang Bu-hong,Wang Yong-liang,Chen Hui.Improving spectral resolution of subspace-based DOA estimation algorithms by localized subspace projection[J].ACTA Electronica Sinica,2003,31(3):459-463 [10] 游鸿,黄建国,金勇,等.基于加权信号子空间投影的MUSIC改进算法[J].系统工程与电子技术,2008,0(5):792-794 You Hong,Huang Jian-guo,Jin Yong,et al.Improving MUSIC performance in snapshot deficient scenario via weighted signal-subspace projection [J].Systems Engineering and Electronics,2008,30(5):792-794 [11] 司伟建,蓝晓宇.基于谱函数二阶导数的波达方向估计算法[J].系统工程与电子技术,2011,3(7):1434-1437 Si Wei-jian,Lan Xiao-yu.Algorithm for DOA Estimation using second derivative of Spectrum [J].Systems Engineering and Electronics,2011,33(7):1434-1437 |
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