Search

CN-116736229-B - Radar signal identification method, device, equipment and medium

CN116736229BCN 116736229 BCN116736229 BCN 116736229BCN-116736229-B

Abstract

The application relates to a radar signal identification method, a device, equipment and a medium, wherein the method comprises the steps of obtaining signal data of preset frequency, converting time domain data into frequency domain data, calculating a monitoring threshold of a pulse signal according to the frequency domain data, determining time position information of a frequency point exceeding the monitoring threshold in the frequency domain data, taking the pulse signal which is at the same frequency point and has the duration exceeding a preset time period as a preliminary effective pulse signal, monitoring the arrival time of the preliminary effective pulse signal of the frequency point, and determining an effective radar signal when the arrival time difference of the continuous preset number of preliminary effective pulse signals is the same. The method provided by the application can be used for effectively identifying the radar signal under a low-power consumption scene by carrying out preliminary identification and final confirmation on the pulse signal, determining the effective radar signal, completing preliminary search on the signal of the designated frequency band or the frequency point and storing the data meeting the conditions.

Inventors

  • KONG SHUYI
  • WANG XIAOFENG

Assignees

  • 北京博智通宇科技有限公司

Dates

Publication Date
20260505
Application Date
20230531

Claims (8)

  1. 1. A method of radar signal identification, comprising: acquiring signal data of a preset frequency; Selecting time domain data of a preset sampling point in the signal data, and converting the time domain data into frequency domain data; Calculating a monitoring threshold of a pulse signal according to the frequency domain data, and determining time position information of a frequency point exceeding the monitoring threshold in the frequency domain data; according to the time position information, taking pulse signals which are at the same frequency point and have the duration exceeding a preset time period as preliminary effective pulse signals, and determining the arrival time of the preliminary effective pulse signals; Monitoring the arrival time of the preliminary effective pulse signals of the frequency point, and determining the preliminary effective pulse signals as effective radar signals when the arrival time difference of the continuous preset number of the preliminary effective pulse signals is the same in the frequency point; The calculating the monitoring threshold of the pulse signal according to the frequency domain data comprises the following steps: selecting frequency domain data with preset proportion as data to be processed; Calculating the average power of the data to be processed, and calculating a monitoring threshold of a pulse signal according to the average power and a preset coefficient; the preset proportion is 80%, and the selecting the frequency domain data with the preset proportion as the data to be processed includes: And selecting the data of the first 40% of frequency point data and the last 40% of frequency point data of the frequency domain data as data to be processed.
  2. 2. The method of claim 1, wherein the monitoring threshold for the pulse signal is calculated by, Wherein, the Indicating a monitoring threshold value, The preset coefficient is indicated to be the same as the preset coefficient, The frequency point is represented by a frequency point, Indicating the frequency bin position number.
  3. 3. The method of claim 1, wherein the step of determining the position of the substrate comprises, A pulse signal at the same frequency point and with a duration exceeding 2us is used as a preliminary effective pulse signal; When the time difference of the arrival time of the continuous 3 preliminary effective pulse signals exists at the frequency point is the same, the preliminary effective pulse signals are determined to be effective radar signals.
  4. 4. The method as recited in claim 1, further comprising: The valid radar signals are stored.
  5. 5. The method of claim 1, wherein the step of determining the position of the substrate comprises, The time domain data is converted into frequency domain data using FFT.
  6. 6. A radar signal identifying apparatus, comprising: The acquisition module is used for acquiring signal data of preset frequency; The sampling module is used for selecting time domain data of preset sampling points in the signal data and converting the time domain data into frequency domain data; The calculation module is used for calculating a monitoring threshold of the pulse signal according to the frequency domain data and determining time position information of a frequency point exceeding the monitoring threshold in the frequency domain data; The preliminary identification module is used for taking the pulse signals which are at the same frequency point and have the duration exceeding a preset time period as preliminary effective pulse signals according to the time position information, and determining the arrival time of the preliminary effective pulse signals; The identification confirmation module is used for monitoring the arrival time of the preliminary effective pulse signals of the frequency point, and determining that the preliminary effective pulse signals are effective radar signals when the time difference of the arrival time of the continuous preset number of preliminary effective pulse signals exists in the frequency point; the computing module is also used for selecting frequency domain data with preset proportion as data to be processed; Calculating the average power of the data to be processed, and calculating a monitoring threshold of a pulse signal according to the average power and a preset coefficient; the preset proportion is 80%, and the selecting the frequency domain data with the preset proportion as the data to be processed includes: And selecting the data of the first 40% of frequency point data and the last 40% of frequency point data of the frequency domain data as data to be processed.
  7. 7. A computer device comprising a memory and a processor, the memory storing a computer program which, when executed by the processor, causes the processor to perform the radar signal identification method of any one of claims 1 to 5.
  8. 8. A computer storage medium, characterized in that a computer program is stored, which, when being executed by a processor, causes the processor to perform the radar signal identification method according to any one of claims 1 to 5.

Description

Radar signal identification method, device, equipment and medium Technical Field The invention belongs to the technical field of big data processing, and particularly relates to a radar signal identification method, device, equipment and medium. Background With the development of radar technology, radar radiation source signals of various new systems are dominant, meanwhile, the density of electromagnetic environment signals is increasingly dense, and radar radiation source signal identification is a key processing process in electronic information reconnaissance, electronic support reconnaissance and radar threat alarming systems, and is also a premise and a foundation of electronic interference, and the identification level is an important sign for measuring the technical advancement degree of radar countermeasure equipment. In the related art, a channelized receiver and various sorting algorithms are mainly used for identifying radar signals, and the identification method of the radar signals occupies more resources, so that the radar signals cannot be effectively identified in a low-power consumption scene. Disclosure of Invention In view of the above, the present invention aims to overcome the shortcomings of the prior art, and provide a method, a device and a medium for identifying radar signals, so as to solve the problem that the radar signals cannot be effectively identified in a low-power consumption scene in the prior art. In order to achieve the purpose, the invention adopts the following technical scheme that the radar signal identification method comprises the following steps: acquiring signal data of a preset frequency; Selecting time domain data of a preset sampling point in the signal data, and converting the time domain data into frequency domain data; Calculating a monitoring threshold of a pulse signal according to the frequency domain data, and determining time position information of a frequency point exceeding the monitoring threshold in the frequency domain data; according to the time position information, taking pulse signals which are at the same frequency point and have the duration exceeding a preset time period as preliminary effective pulse signals, and determining the arrival time of the preliminary effective pulse signals; And monitoring the arrival time of the preliminary effective pulse signals of the frequency point, and determining the preliminary effective pulse signals as effective radar signals when the arrival time difference of the continuous preset number of the preliminary effective pulse signals of the frequency point is the same. Further, calculating a monitoring threshold of the pulse signal according to the frequency domain data includes: selecting frequency domain data with preset proportion as data to be processed; and calculating the average power of the data to be processed, and calculating a monitoring threshold of the pulse signal according to the average power and a preset coefficient. Further, the monitoring threshold of the pulse signal is calculated in the following way, Wherein P thre represents a monitoring threshold, beta represents a preset coefficient, X' i represents a frequency point, and M represents a frequency point position number. Further, the preset proportion is 80%, and the selecting the frequency domain data of the preset proportion as the data to be processed includes: And selecting the data of the first 40% of frequency point data and the last 40% of frequency point data of the frequency domain data as data to be processed. Further, a pulse signal at the same frequency point and with a duration exceeding 2us is used as a preliminary effective pulse signal; When the time difference of the arrival time of the continuous 3 preliminary effective pulse signals exists at the frequency point is the same, the preliminary effective pulse signals are determined to be effective radar signals. Further, the method further comprises the following steps: The valid radar signals are stored. Further, FFT is employed to convert the time domain data into frequency domain data. The embodiment of the application provides a radar signal identification device, which comprises: The acquisition module is used for acquiring signal data of preset frequency; The sampling module is used for selecting time domain data of preset sampling points in the signal data and converting the time domain data into frequency domain data; The calculation module is used for calculating a monitoring threshold of the pulse signal according to the frequency domain data and determining time position information of a frequency point exceeding the monitoring threshold in the frequency domain data; The preliminary identification module is used for taking the pulse signals which are at the same frequency point and have the duration exceeding a preset time period as preliminary effective pulse signals according to the time position information, and determining the arrival time of the pr