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A Parameter Estimation Method for Tracking Radiation Source Based on Passive Radar Seeker and Its Application

A passive radar and parameter estimation technology, applied in the field of tracking radiation source parameter estimation of radar, can solve the problems of increasing the difficulty of target recognition, poor, inability to agile frequency pulse PRI estimation and other problems, and improve the time continuity. and reliability, improve accuracy, and improve the effect of anti-interference performance

Active Publication Date: 2021-10-22
无锡国芯微电子系统有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

(3) Jammers and decoy systems are deployed near radar and communication stations, which increases the difficulty of target identification
[0006] Therefore, the present invention provides a method for estimating parameters of tracking radiation sources based on passive radar seekers and its application in radio reconnaissance, so as to solve the problems that traditional methods cannot estimate the frequency-agile pulse PRI and have poor anti-jamming performance

Method used

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  • A Parameter Estimation Method for Tracking Radiation Source Based on Passive Radar Seeker and Its Application

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Experimental program
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Embodiment 1

[0034] like figure 1 As shown, a method for estimating parameters of a tracking radiation source based on a passive radar seeker, when there is one radar and several interference sources in the tracking direction, the radar signal is screened out through the following steps, and the pulse parameters are estimated:

[0035] Step 1: Save the PDW (Pulse Description Word) of the pulse in the tracking direction; calculate the deviation between the arrival direction of each input pulse and the tracking direction, and save the PDW of the pulses whose deviation is less than the tolerance in order according to the arrival time;

[0036] Step 2: Calculate the leading edge frequency and leading edge slope of each pulse in the tracking direction, and save it to PDW; calculate the first-order difference of the delay phase difference of 8 sampling points at the leading edge of each pulse, divide it by the sampling interval, and obtain the leading edge frequency; calculate each pulse The sec...

Embodiment 2

[0047] An application of the passive radar seeker-based tracking radiation source parameter estimation method described in Embodiment 1 in radio reconnaissance.

[0048] In summary, the present invention can effectively estimate the PRI of the agile frequency pulse by first eliminating the fixed frequency pulse, and then dividing the agile frequency pulse into the same subspace, which overcomes the inability of the traditional method to estimate the PRI of the agile frequency pulse It improves the time continuity and reliability of the estimation method. The classification parameters adopted by the present invention are pulse front frequency and front slope, which are more reliable than the average frequency and pulse width adopted by the traditional method in the interference environment, improve the anti-interference performance of the estimation method, and improve the accuracy of parameter estimation at the same time.

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Abstract

The invention discloses a method for estimating parameters of a tracking radiation source based on a passive radar seeker and its application in radio reconnaissance. When there is one radar and several interference sources in the tracking direction, the radar signal is screened out through the following steps and estimated Pulse parameters: Step 1: Save the PDW of the pulse in the tracking direction; Step 2: Calculate the leading edge frequency and leading edge slope of each pulse in the tracking direction, and save it to PDW; Step 3: Cluster the pulses in the tracking direction according to the leading edge frequency and leading edge slope; Step 4: Perform PRI sorting on the pulses in the grid whose number of pulses exceeds the threshold; Step 5: Determine the fixed frequency pulse; Step 6: Perform slope clustering on the pulses in the tracking direction; The pulses in the threshold box are sequentially sorted by PRI; step 8: judgment of frequency-agile pulses. The invention solves the problems that the traditional method cannot estimate the frequency-agile pulse PRI and has poor anti-interference performance, and improves the time continuity, anti-interference performance and parameter estimation accuracy of the estimation method.

Description

technical field [0001] The invention relates to a radio detection technology, in particular to a passive radar seeker-based tracking radiation source parameter estimation method and its application. Background technique [0002] The passive radar seeker obtains the information of the radiation source by receiving the electromagnetic signal radiated by the radiation source (radar, communication station) in space, and guides the attacking weapon to hit the radiation source. performance. [0003] Modern passive radar seekers have the following characteristics: (1) The working distance is long. The passive radar seeker has high sensitivity, large dynamic range, fast automatic gain control capability, and can intercept radar signals from radar side lobes and back lobes. (2) The active frequency bandwidth can cover the working frequency of most air defense radars. (3) The accuracy of angle measurement is high, and it has a memory function. Even if the opponent's radar is turned...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/292
CPCG01S7/292
Inventor 温帅李晓婷
Owner 无锡国芯微电子系统有限公司