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Single channel radar signal sorting method

A radar signal sorting and single-channel technology, which is applied in the field of signal processing, can solve problems such as the failure of radar sorting methods, and achieve the effects of wide application range, high sorting accuracy and low price

Active Publication Date: 2016-01-27
TSINGHUA UNIV
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Problems solved by technology

Due to the movement of the satellite position, the pulse repetition frequency of the radar signal will change to a certain extent. At the same time, some radar pulses will also intentionally add a certain range of jitter, and some radars use a staggered pulse repetition interval method. These will lead to traditional radar sorting. method failure

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Embodiment Construction

[0014] The present invention will be described in detail below in conjunction with the accompanying drawings. However, it should be understood that the accompanying drawings are provided only for better understanding of the present invention, and they should not be construed as limiting the present invention.

[0015] Such as figure 1 As shown, the single-channel radar signal sorting method provided by the present invention comprises the following steps:

[0016] 1. Based on the satellite platform, use a single antenna and a single receiver channel to receive the pulse signal of the ground radar radiation source, obtain the TOA (time of arrival) sequence by estimating and measuring the time of arrival of the pulse signal, and then select a certain length N The TOA sequence constitutes the original pulse arrival time series set, such as figure 2 shown.

[0017] 2. Perform multi-dimensional difference processing on the original pulse arrival time series, that is, perform dif...

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Abstract

The invention relates to a single channel radar signal sorting method, which comprises the following steps: 1) selecting one N-length section of arrival time sequence to form an original pulse arrival time sequence set; 2) performing a multidimensional difference processing for the original pulse arrival time sequence; 3) performing grouping for the time interval obtained by difference processing for each arrival time, and performing statistical counting; 4) drafting a PRI clustering statistical histogram according to the statistical counting result of the time interval obtained by difference processing for the arrival time included in each group, and comparing the PRI clustering statistical histogram with a detection threshold to obtain possible PRI estimated values; 5) rejecting the harmonic component of the possible PRI estimated values to obtain eligible PRI estimated values; and 6) successively extracting the corresponding arrival time sequence from the original pulse arrival time sequence according to each eligible PRI estimated value, forming a sequence of the extracted arrival times according with the same PRI estimated value in time order, and finishing the signal sorting process.

Description

technical field [0001] The invention relates to the technical field of signal processing, in particular to a single-channel radar signal sorting method. Background technique [0002] Radar signal sorting is a technology that uses certain methods to complete signal sorting by receiving the signal radiated by the radar radiation source itself. Radar signal sorting is the basis of radar signal analysis and identification. Only after the pulse sequences of different radars are sorted, can different radars be accurately identified and parameter estimated, thereby judging the type and threat attribute of the radar. Radar signal sorting is an important aspect in the field of radar countermeasures, especially the unknown radar signal sorting technology in complex electromagnetic environments. Due to its strong applicability and good concealment, it has been favored by various countries in recent years attention. [0003] The traditional radar signal sorting method is to use the sa...

Claims

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Application Information

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IPC IPC(8): G01S7/02
CPCG01S7/02
Inventor 黄振陈曦梁凯强何加智胡德秀张尚煜
Owner TSINGHUA UNIV
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