Method for detecting pulse repetition interval (PRI) staggering radar signals

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

Active Publication Date: 2018-06-29
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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  • Method for detecting pulse repetition interval (PRI) staggering radar signals
  • Method for detecting pulse repetition interval (PRI) staggering radar signals

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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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Abstract

The invention discloses a method for detecting pulse repetition interval (PRI) staggering radar signals. The method comprises the following steps: performing histogram analysis on TOA (time of arrival) of input pulse stream PDW, and counting all effective sub-cycle numbers PRITotal as well as a value PRIValue[i], an appearing number PRIN[i] and a pulse address pair PRIAddr[i] of each effective sub-cycle; with respect to each effective sub-cycle PRI, counting all time intervals appearing in the effective sub-cycles PRI in the PDW sequence; counting the minimum interval at which each effective sub-cycle PRI repeatedly appears; determining whether PRI staggering signals exist, if so, determining frame cycles, and transferring to the next step; if not, exiting from detection, and indicating that no PRI staggering signal exist in the input PDW; determining the number of the effective sub-cycles and truth values of the various effective sub-cycles, and completing sorting of the PRI staggering signals and PRI parameter statistics of the signals. According to the method disclosed by the invention, when more pulse is lost in the input pulse stream or the total input pulse number is too small, and the PRI staggering signals can be accurately and effectively detected.

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 Applications(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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