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Estimation method of broadband signal amplitude ratio

A wideband signal and amplitude ratio technology, applied in direction finders using radio waves, radio wave direction/deviation determination systems, etc., to achieve good application value and fast extraction effects

Active Publication Date: 2020-06-12
36TH RES INST OF CETC
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Problems solved by technology

The time-domain quadrature correlation method can only be used for amplitude and amplitude ratio estimation of a single wideband signal

Method used

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  • Estimation method of broadband signal amplitude ratio
  • Estimation method of broadband signal amplitude ratio
  • Estimation method of broadband signal amplitude ratio

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Embodiment Construction

[0046] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the application and together with the embodiments of the present invention are used to explain the principle of the present invention and are not intended to limit the scope of the present invention.

[0047] The embodiment of this specification provides a method for estimating the amplitude ratio of wideband signals, which is used to realize the comparison of the amplitude ratios of broadband signals received by multiple antennas in a direction finding system, that is, to compare the amplitude ratios of wideband signals measured by two direction finding antennas.

[0048] It should be noted that the broadband signal mentioned in this embodiment may refer to a signal radiated in space, or may refer to a signal coupled and responded by an antenna, which needs to be analyzed according to the co...

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Abstract

The invention provides an estimation method of a broadband signal amplitude ratio. The estimation method comprises the following steps: estimating a spectral line position corresponding to a broadbandsignal; for the broadband signals received by the two sampling channels, respectively adopting fast Fourier transform to obtain the amplitude of each spectral line position; and calculating the amplitude ratio of the two sampling channels according to the amplitudes of the two sampling channels at each spectral line position. The amplitude ratios of a plurality of signals can be quickly estimatedat one time on a relatively wide bandwidth, and the amplitude ratio of the broadband signal can be quickly extracted. The method is not only suitable for single-tone signals, but also has good application value in amplitude method comparison direction finding.

Description

technical field [0001] The invention relates to the field of ratio-amplitude direction-finding technology and signal parameter estimation technology, in particular to a method and device for estimating the amplitude ratio of wideband signals. Background technique [0002] In the direction finding by the amplitude comparison method, the amplitude difference between each channel is not large, and there is a large human error when measuring the signal amplitude of each channel with an oscilloscope, which may cause direction finding errors. [0003] In order to solve the aforementioned problems, the digital signal amplitude measurement technology has been developed and applied. The digital signal amplitude estimation methods include the maximum likelihood method, the least square method and the orthogonal correlation method. Among them, the maximum likelihood method and the least squares method not only have a large amount of calculation, but also need to accurately estimate the...

Claims

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Application Information

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IPC IPC(8): G01S3/14
CPCG01S3/14
Inventor 叶云霞陆安南黄凯
Owner 36TH RES INST OF CETC
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