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首页> 外文期刊>IEEE Transactions on Signal Processing >Performance analysis of direction finding using lag redundancy averaging
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Performance analysis of direction finding using lag redundancy averaging

机译:使用滞后冗余平均的测向性能分析

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摘要

The lag redundancy averaging (LRA) method for processing linear equispaced arrays is examined. LRA is a simple procedure for estimating Toeplitz covariance matrices, which can be computed efficiently by means of spatial fast Fourier transform (FFT) algorithms. The effect of LRA on the performance of the MUSIC method for uncorrelated sources is investigated. Closed-form expressions for the asymptotic bearing accuracy are obtained. It is shown, for the single source case, that the LRA method is asymptotically efficient. For two equipowered sources, it is shown that while the resolution threshold of the LRA method is superior to that of standard MUSIC, its asymptotic accuracy is inferior.
机译:研究了用于处理线性等距阵列的滞后冗余平均(LRA)方法。 LRA是估算Toeplitz协方差矩阵的简单过程,可以通过空间快速傅立叶变换(FFT)算法高效地进行计算。研究了LRA对不相关源的MUSIC方法性能的影响。获得了渐近轴承精度的闭式表达式。对于单源情况,它表明LRA方法是渐近有效的。对于两个等功率源,结果表明,虽然LRA方法的分辨率阈值优于标准MUSIC,但其渐近精度较差。

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