Single-baseline interferometer direction finding method and device

An interferometer and single-baseline technology, which is used in measurement devices, radio wave measurement systems, and direction-determining direction guides, etc., can solve problems such as poor accuracy of estimated time difference, and achieve the effect of improving accuracy and direction finding accuracy.

Active Publication Date: 2019-07-19
36TH RES INST OF CETC
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Problems solved by technology

However, for many typical signals, the signal-to-noise ratios corresponding to different spectral lines are different, and the estimation accuracy of the time difference is poor for the spectral lines in the frequency band where the entire signal is located.

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  • Single-baseline interferometer direction finding method and device
  • Single-baseline interferometer direction finding method and device
  • Single-baseline interferometer direction finding method and device

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[0025] In order to make the objectives, technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0026] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. It should be understood, however, that these descriptions are exemplary only, and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concepts of the present invention.

[0027] The terminology used herein is for the purpose of describing specific embodiments only, and is not intended to limit the present invention. As used herein, the words "a," "an," and "the" and the like shall also include the meanings of "plurality," "plurality," unless the context clearly dictates otherwis...

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Abstract

The invention discloses a single-baseline interferometer direction finding method and device. The device comprises a spectral analysis unit, a first calculation unit, a second calculation unit and anestimation and direction finding unit. The method comprises the steps of: processing a signal received by a single-baseline interferometer to obtain a spectrum of the signal; obtaining a signal to noise ratio and a phase difference measuring result of each spectral line participating time difference estimation according to the spectrum of the signal; obtaining a weight coefficient of each spectralline participating the time difference estimation according to a pre-obtained corresponding relationship between signal to noise ratios of the spectral lines and weight coefficients of the spectral lines; and obtaining a time difference estimated value by utilizing a pre-established time difference estimation model according to the weight coefficient and phase difference measuring result of eachspectral line participating the time difference estimation and an angular frequency of the signal, so as to obtain a direction of the signal according to the time difference estimated value. The method and device are capable of effectively improving the direction finding precision.

Description

technical field [0001] The invention relates to the technical field of interferometer direction finding, in particular to a method and device for direction finding of a single baseline interferometer. Background technique [0002] The interferometer direction finding system is a widely used direction finding system. In general, in order to obtain high precision and low ambiguity rate, multi-baseline interferometers are often used, long baselines are used to obtain high-precision phase difference measurement accuracy, and short baselines are used to solve phase ambiguity, thus forming a series of typical interferometer measurements. To systematic schemes, such as long and short baseline cross array, long and short baseline L-shaped array, uniform five-element circular array, etc. [0003] In some scenarios, when a single baseline interferometer is used due to space, weight, and cost constraints, it is necessary to face the trade-off between direction finding accuracy and dir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S3/48
CPCG01S3/48
Inventor 尤明懿陆安南叶云霞
Owner 36TH RES INST OF CETC
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