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论文:2012,Vol:30,Issue(1):108-111 |
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引用本文： |
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杜金香, 冯西安, 杜金燕. 一种基于波束域最大非冗余矩阵的四阶高分辨DOA估计算法[J]. 西北工业大学 |
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Du Jinxiang, Feng Xi'an, Du Jinyan. A Better High Resolution Fourth-Order DOA Algorithm Based on Beamspace Maximal Set of Nonredundant Cumulant[J]. Northwestern polytechnical university |
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| 一种基于波束域最大非冗余矩阵的四阶高分辨DOA估计算法 |
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| 杜金香, 冯西安, 杜金燕 |
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| 西北工业大学 航海学院,陕西 西安 710072 |
| 摘要: |
| 在非白噪声背景下,基于二阶统计量的高分辨方法性能较差。基于四阶累积量的高分辨方法能较好地抑制空间高斯噪声,但其运算量较大。文献[9] 提出了一种基于四阶累积量的波束域MUSIC方法,降低了运算量,但其四阶累积量矩阵仍存在较多的冗余元素。为了进一步降低运算量,提出了一种波束域最大非冗余四阶累积量矩阵。仿真分析和实验结果表明,与波束域四阶累积量MUSIC方法相比,论文所提方法在保证估计性能的同时减小了运算量。 |
| 关键词:
四阶累积量
波束域
最大非冗余
MUSIC方法
方位估计
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| A Better High Resolution Fourth-Order DOA Algorithm Based on Beamspace Maximal Set of Nonredundant Cumulant |
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| Du Jinxiang, Feng Xi'an, Du Jinyan |
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| College of Marine Engineering,Northwestern Polytechnical University,Xi'an 710072,China |
| Abstract: |
| Aim.Refs.4 through 7 are,in our opinion,somewhat deficient in either direction-of-arrival(DOA) es-timation performance or computation load in the spatially correlated Gaussian noise environment.Ref.9 solves the a-bove problem to a certain extent,but the computation load is still not satisfactory.We propose a method that,webelieve,is better.Section 2 of the full paper briefs the beamspace fourth-order cumulant(BFOC) method in Ref.9that uses beamspace data to build a full set of cumulant matrix.Section 3 explains in some detail our fourth-ordercumulant method using beamspace maximal set of nonredundant cumulant(BMSNC).The core of section 4 is thatour better method deals with the BMSNC matrix of the beams'output signals and therefore leads to less computationcost.Section 5 presents the simulation results,which are given in Figs.1 through 4,and compares the resolutionand estimation precision of our method with those of the BFOC method in Ref.9.The comparison shows preliminari-ly that our method has just as good DOA estimation performance as the BFOC method but quite importantly at lesscomputation cost. |
| Key words:
algorithms
analysis
approximation theory
arrays
beamforming
calculations
direction of arrival
efficiency
errors
estimation
Gaussian noise
models
parameter estimation
probability
redundan-cy
signal processing
signal to noise ratio
simulation
spectrum analysis
stability
statistics
fourth-order cumulant
MUSIC algorithm．
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| 收稿日期: 2011-04-18
修回日期:
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| DOI: |
| 通讯作者:
Email： |
| 作者简介: 杜金香(1977-),女,西北工业大学讲师、博士,主要从事水下信号检测、参数估计及目标识别等的研究
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参考文献: |
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