基于四階混合累積量的雷達目標二維超分辨成像
Two-Dimensional Super-Resolution Imaging of Radar Target Based on Fourth-Order Mixed Cumulants
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摘要: 針對高斯色噪聲條件下雷達目標二維成像問題，提出了一種基于四階混合累積量的二維ESPRIT超分辨成像方法。利用四階混合累積量對高斯色噪聲的自動抑制，降低了噪聲對成像質(zhì)量的影響。通過保持目標特征矩陣結(jié)構(gòu)不變，解決了現(xiàn)有方法在長采樣數(shù)據(jù)條件下計算量過大的問題。仿真實驗表明該方法的成像效果和散射點位置估計精度優(yōu)于傳統(tǒng)方法。
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關(guān)鍵詞:
- 二維超分辨成像;四階混合累積量;二維諧波恢復;高斯色噪聲
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. -
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. 戈盧布, C. F. 范洛恩著. 袁亞湘等譯. 矩陣計算. 北京：科學出版社, 2002: 293-294. -
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