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Rapid signal detection and search method based on spectrum dispersion analysis

A search method and dispersion technology, applied in the field of signal processing, can solve the problems of DS signal concealment, unreasonable threshold setting, signal missing detection, etc., and achieve easy engineering implementation, convenient follow-up filter design, and strong robustness Effect

Active Publication Date: 2021-03-02
XIAN INSTITUE OF SPACE RADIO TECH
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Problems solved by technology

Due to the uncertainty of the frequency position and amplitude of the unknown target signal, or the direct spread signal is hidden in the noise, it is easy to cause the problem of unreasonable threshold setting and missed signal detection.

Method used

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  • Rapid signal detection and search method based on spectrum dispersion analysis
  • Rapid signal detection and search method based on spectrum dispersion analysis
  • Rapid signal detection and search method based on spectrum dispersion analysis

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Embodiment Construction

[0043]In order to better understand the above technical solutions, the technical solutions of the present application will be described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present application and the specific features in the embodiments are detailed descriptions of the technical solutions of the present application. It is not a limitation on the technical solutions of the present application. The embodiments of the present application and the technical features in the embodiments can be combined with each other if there is no conflict.

[0044]In the following, in conjunction with the accompanying drawings of the specification, a method for rapid detection and search of signals based on spectral dispersion analysis provided by the embodiments of the present application will be described in further detail.figure 1 Shown):

[0045]Spectrum is the abbreviation of frequency spectral density, and is the...

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Abstract

The invention discloses a rapid signal detection and search method based on spectrum dispersion analysis, belongs to the technical field of signal processing, and particularly relates to satellite-borne wide-area electronic reconnaissance large-bandwidth signal processing which is used for detection and search of target signals in an electronic reconnaissance large-bandwidth range. The method comprises the following steps: firstly, dividing a detection frequency band, rapidly determining a sub-segment where a target signal is located by adopting a method of taking a ratio of variance of adjacent sub-segments according to the fact that the dispersion of the segmented sub-segment containing the target signal is different from that of a pure noise sub-segment (the dispersion is represented byvariance), re-dividing the sub-segment, and repeating the process, and finally rapidly positioning the target signal. In addition, the method can effectively identify the pure noise sub-segment and the direct sequence spread spectrum signal, and can realize rapid detection and search of the conventional signal and the direct sequence spread spectrum signal at the same time. The method is simple in principle and easy for engineering realization, and can realize detection automation and avoid signal missing detection. The method has passed on-orbit verification and is good in effect.

Description

Technical field[0001]The invention relates to a signal rapid detection and search method based on spectrum dispersion analysis, which belongs to the technical field of signal processing, in particular to the large-bandwidth signal processing of satellite-borne wide-area electronic reconnaissance, which is used for detection and search of target signals in the large-bandwidth range of electronic reconnaissance.Background technique[0002]The degree of dispersion refers to the index used to measure the degree of risk by randomly observing the degree of difference between the values ​​of a variable. By measuring the degree of dispersion between the values ​​of random variables, it can reflect the size of the differences between the individual observations, which can also reflect the representativeness of the value of each observation variable by the index of the distribution center. By measuring the degree of dispersion between the values ​​of random variables, it can reflect the thinnes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/707H04B7/185
CPCH04B7/18513H04B1/707Y02D30/70
Inventor 杜宇杨伟超张建华袁素春肖化超
Owner XIAN INSTITUE OF SPACE RADIO TECH
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