A Detection Method of Radar Signal with Staggered Repetition Frequency

A detection method and radar signal technology, applied in radio wave measurement systems, instruments, etc., can solve problems such as easy sorting into jitter signals

Active Publication Date: 2021-07-06
扬州健行电子科技有限公司
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Problems solved by technology

When there are many missing pulses or the total number of input pulses is too small (for example: when the narrowband receiver works in the scanning search mode for the wide frequency band, the number of pulses received in one scan of a certain sub-band will be relatively small), the traditional The sorting method is easy to sort into dithered signals in this case

Method used

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  • A Detection Method of Radar Signal with Staggered Repetition Frequency
  • A Detection Method of Radar Signal with Staggered Repetition Frequency

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Embodiment 1

[0043]In order to achieve real-time and full-pulse processing of the input pulse stream, the present embodiment is based on FPGA and a hardware architecture of dual CPUs (CPPUA, CPUB), wherein FPGA is used for real-time collection and buffering of PDW from the receiver; CPUA sends to FPGA PDW performs pre-sorting, cluster analysis according to RF, PW, and DOA parameters, and forms multiple channels according to correlation, that is, the initial signal tracking table, which is regularly switched to CPUB for detailed analysis; CPUB uses various algorithms to perform initial signal switching from CPUA The signal tracking table conducts further analysis, extracts the signals of each radiation source, and solves the detailed parameters of each radiation source signal. The sorting method of the present invention is implemented in the CPUB, and is used for confirmation and extraction of repeated frequency staggered signals. The specific implementation steps are as follows:

[0044] ...

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PUM

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Abstract

The invention discloses a method for detecting radar signals with repeated frequency fluctuations. The steps of the method are as follows: perform a histogram analysis on the TOA of the input pulse stream PDW, and count the number of all valid subcycles PRITotal and the value PRIValue[i] of each valid subcycle, the number of occurrences PRIN[i] and the pulse address pair PRIAddr[ i]; for each effective sub-period PRI, count all the time intervals in which the effective sub-period PRI occurs in the PDW sequence; count the minimum time interval for each effective sub-period PRI to reappear; determine whether to repeat the staggered signal, if so then Determine the frame period, and go to the next step; if not, exit the detection, indicating that there is no staggered signal in the input PDW; determine the number of effective sub-periods and the true value of each effective sub-period, and complete the sorting of the repeated frequency staggered signal and the signal Repeat frequency parameter statistics. The present invention can correctly and effectively detect the repetition frequency staggered signal when the input pulse stream loses many pulses or the total input pulse number is too small.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic environment signal monitoring, in particular to a method for detecting radar signals with staggered repetition frequencies. Background technique [0002] In the traditional sorting of PRI staggered signals, the number of sub-periods and each sub-period are generally determined according to the statistics of the histogram. The statistics are accurate. When there are many missing pulses or the total number of input pulses is too small (for example: when the narrowband receiver works in the scanning search mode for the wide frequency band, the number of pulses received in one scan of a certain sub-band will be relatively small), the traditional The sorting method is easy to sort into dithered signals in this case. Contents of the invention [0003] The purpose of the present invention is to provide a detection method for radar signals with repeated frequency staggering, which can also com...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/02
CPCG01S7/02
Inventor 邱灿灿蒋建华郭宇鹏
Owner 扬州健行电子科技有限公司
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