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非圆信号二维测向ERARE算法的精度分析 被引量:2

Performance Analysis of ERARE Algorithm for 2 - D DOA Estimation of Noncircular Signals
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摘要 已经提出的扩展秩损(ERARE)算法,基于双平行线阵的阵列结构,通过一维搜索得到方位角后利用最小二乘方法得到信号的俯仰角,仿真验证其测向性能较优。为了得到ERARE算法的理论性能,对其空间谱函数进行一阶泰勒展开,令其偏导等于零得到测向误差的表达式,再利用投影矩阵扰动与协方差矩阵扰动之间的关系得到测向均方误差的表达式。仿真实验表明,理论结果与ERARE算法随信噪比、快拍数、非圆相位差的仿真性能相吻合。 The formerly proposed ERARE (Extended Rank Reduction) algorithm, which gives the azimuth by 1 - D search and the elevation by least-square method, performs well in the case of noncircular signals. The mean error function of the estimation of the directions of arrival (DOA) can be derived by solving the equations that the first-order perturbation expansion of the spectrum functions equal to zeros. Then the root mean square errors (RMSE) of the DOAs can be obtained by using the relationship between the projection matrix perturbation and the covariance matrix perturbation. Simulation results show the correctness of the above analysis.
出处 《电子对抗》 2011年第1期21-26,共6页 Electronic Warfare
基金 国家自然科学基金资助项目(60802053),航空科学基金资助项目(20090196001),学院博士启动基金资助项目(DG080806)
关键词 阵列信号处理 测向 非圆信号 秩损算法 性能分析 array signal processing direction finding noncircular signals rank reduction performance analysis
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参考文献15

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共引文献18

同被引文献21

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