基于四阶混合累积量的雷达目标二维超分辨成像
Two-Dimensional Super-Resolution Imaging of Radar Target Based on Fourth-Order Mixed Cumulants
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摘要: 针对高斯色噪声条件下雷达目标二维成像问题，提出了一种基于四阶混合累积量的二维ESPRIT超分辨成像方法。利用四阶混合累积量对高斯色噪声的自动抑制，降低了噪声对成像质量的影响。通过保持目标特征矩阵结构不变，解决了现有方法在长采样数据条件下计算量过大的问题。仿真实验表明该方法的成像效果和散射点位置估计精度优于传统方法。Abstract: A new method for two-dimensional super-resolution imaging of radar target in colored Gaussian noise, called two-dimensional FOMC (Fourth-Order Mixed Cumulants) based ESPRIT (2d-FOMCESPRIT) , is presented in this paper. The image is improved for the FOMC could eliminate the Gaussian noise automatically. Additionally this method is computationally much less intensive by holding the dimensions of the feature matrix in the presence of long records. Simulation results show that this method has better image quality than other methods.
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Potter L C, Moses R L. Attributed scattering centers for SAR ATR[J].IEEE Trans. on Image Processing.1997, 6(1):79-91[2]Hua Y. Estimating two-dimensional frequencies by matrix enhancement and matrix pencil[J].IEEE Trans. on Signal Processing.1992, 40(9):2267-2280[3]Sacchini J J, Steedly W M. Two-dimensional prony modeling and parameter estimation[J].IEEE Trans. on Signal Processing.1993, 41(11):3127-3136[4]Rouquette S, Najim M. Estimation of frequencies and damping factors by two-dimensional ESPRIT type methods[J].IEEE Trans. on Signal Processing.2001, 49(1):237-245[5]Wang J. Feature extraction of localized scattering centers using the modified TLS-Prony algorithm and its applications. Journal of Systems Engineering and Electronics, 2002, 13(3): 31-39.[6]Anderson J M M, Giannakis G B, Swami A. Harmonic retrieval using higher order statistics: a deterministic formulation[J].IEEE Trans. on Signal Processing.1995, 43(8):1880-1889[7]Ruiz D P, Carrion M C, Gallego A, Medouri A. Parameter estimation of exponentially damped sinusoids using a higher order correlation-based approach[J].IEEE Trans. on Signal Processing.1995, 43(11):2665-2677[8]G. H. 戈卢布, C. F. 范洛恩著. 袁亚湘等译. 矩阵计算. 北京：科学出版社, 2002: 293-294. -
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