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High-precision instantaneous frequency measurement method and device based on channelization

An instantaneous frequency measurement, high-precision technology, applied in the field of radar signal reconnaissance and interference, can solve the problems affecting frequency measurement accuracy, phase measurement ambiguity, etc.

Active Publication Date: 2018-01-09
CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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Problems solved by technology

[0004] However, when the digital channelization is not enough, affected by the noise, the phase difference instantaneous frequency measurement will have the problem of phase measurement ambiguity, which greatly affects the frequency measurement accuracy

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  • High-precision instantaneous frequency measurement method and device based on channelization
  • High-precision instantaneous frequency measurement method and device based on channelization
  • High-precision instantaneous frequency measurement method and device based on channelization

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Embodiment Construction

[0084] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0085] Such as figure 1 As shown, the channelization-based high-precision instantaneous frequency measurement method of the embodiment of the present invention includes the following steps:

[0086] Step S1, performing digital channelization processing on the input radar signal, including: using a polyphase band-pass filter bank to extract and filter the input radar signal, and performing Fourier FFT transform to output sample points of multiple channels, To achieve digital channelization processing to filter out the noise outsi...

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Abstract

The invention provides a high-precision instantaneous frequency measurement method and device based on channelization. The method comprises the following steps: carrying out digital channelization processing on an input radar signal: carrying out extraction and filtering on the input radar signal through a multi-phase band-pass filter group, carrying out fast Fourier transform (FFT), and then, outputting sample points of multiple channels to realize digital channelization processing; carrying out instantaneous frequency measurement on the plurality of paths of signals obtained after digital channelization processing through a phase difference method and an interpolation method respectively; and carrying out ambiguity-resolving processing on the frequency obtained through the phase difference method according to the frequency obtained through the interpolation method to enable the original fuzzy frequency to be corrected into the correct frequency. The method and device can still have higher frequency measurement precision when the digital channelization does not have oversampling.

Description

technical field [0001] The invention relates to the technical field of radar signal reconnaissance and interference in electronic reconnaissance, in particular to a method and device for high-precision instantaneous frequency measurement based on channelization. Background technique [0002] Modern electronic warfare needs to intercept the enemy's electromagnetic spectrum information, the most important of which is to measure the frequency parameter of the enemy's electromagnetic signal. According to this frequency parameter, important indicators such as the frequency range and spectrum width of the frequency agile radar can be obtained. It can Reflect the function and use of radar. In the modern complex electromagnetic environment, in order to implement effective jamming, the signals must be sorted and threat identified first, and the frequency information of the radar is an important basis for sorting and threat identification. [0003] The more common frequency measureme...

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Application Information

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IPC IPC(8): G01R23/02
Inventor 王镪恽建波郭芝源王启智孙龙
Owner CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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