Multifrequency Doppler: improving the quality of spectral estimation by making full use of the information present in the backscattered RF echoes

Loupas T.; Gill R.W.

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Multifrequency Doppler: improving the quality of spectral estimation by making full use of the information present in the backscattered RF echoes

机译：多频多普勒：通过充分利用反向散射RF回波中存在的信息来提高频谱估计的质量

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This paper investigates the application of the two-dimensional Fourier transform in the context of pulsed wave Doppler. It is shown that two-dimensional spectral analysis of the backscattered RF echoes provides individual Doppler spectra corresponding to the whole range of transmitted frequencies which can be combined, after proper scaling, to form a "multifrequency" spectral estimate. Theoretical expressions are derived for the signal-to-noise ratio of the multifrequency sonogram which predict substantial gains over the conventional (one-dimensional) approach for Doppler processing. These predictions are verified by means of extensive simulations, which also provide an insight into the effect of electronic noise.

机译：本文研究了二维傅里叶变换在脉冲多普勒背景下的应用。示出了对反向散射的RF回波的二维频谱分析提供了对应于整个发射频率范围的单独的多普勒频谱，这些频谱可以在适当缩放之后进行组合以形成“多频”频谱估计。推导了针对多频声波图的信噪比的理论表达式，该理论表达式预测了与用于多普勒处理的常规（一维）方法相比的实质性增益。这些预测通过广泛的模拟进行了验证，这些模拟还可以洞悉电子噪声的影响。

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《IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control》 |1994年第4期|P.522-531|共10页
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Loupas T.; Gill R.W.;
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1. Multifrequency Doppler: improving the quality of spectralestimation by making full use of the information present in thebackscattered RF echoes [J] . Loupas T., Gill R.W. IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control . 1994,第4期

机译：多频多普勒：通过充分利用反向散射RF回波中存在的信息来提高频谱估计的质量
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Multifrequency Doppler: improving the quality of spectral estimation by making full use of the information present in the backscattered RF echoes

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