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Navigation radar signal sorting method based on envelope analysis

A navigation radar and envelope analysis technology, applied in the field of navigation radar signal sorting based on envelope analysis, can solve problems such as false alarms

Active Publication Date: 2020-03-24
扬州船用电子仪器研究所
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  • Abstract
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  • Application Information

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Problems solved by technology

However, the traditional signal sorting and fusion method does not effectively deal with the characteristics of navigation radar signals, so there are serious false alarms

Method used

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  • Navigation radar signal sorting method based on envelope analysis
  • Navigation radar signal sorting method based on envelope analysis
  • Navigation radar signal sorting method based on envelope analysis

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Experimental program
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Embodiment

[0091] A navigation radar signal sorting method based on envelope analysis, the specific steps are:

[0092] Step 1, in this embodiment, the original pulse descriptor set X={x containing the navigation frequency band signal 1 ,x 2 ,...,x n ,...,x N}, where N is the total number of original pulse samples, Represents the nth original pulse description word, rf is the carrier frequency, pw is the pulse width, doa is the azimuth, pa is the amplitude, and toa is the arrival time. set rf min is the lower limit of the carrier frequency of the navigation radar, rf max is the upper limit of carrier frequency of navigation radar, pw max The upper limit of the pulse width of the navigation radar, according to the characteristics of the navigation radar signal, carry out carrier frequency and pulse width filtering on the input original pulse description word set, and obtain the navigation pulse description word set Y, satisfying the following conditions:

[0093]

[0094] Among...

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Abstract

The invention discloses a navigation radar signal sorting method based on envelope analysis, and the method comprises the steps: carrying out the carrier frequency and pulse width filtering of an original pulse description word set, and obtaining a navigation pulse description word set; carrying out carrier frequency orientation parameter clustering on the navigation pulse description word set, carrying out envelope division on the obtained pulse cluster set, and extracting envelope description words of a single scanning envelope exceeding a pulse number threshold; establishing a navigation target table; traversing the navigation target table, backtracking the navigation pulse description word set, and calculating the scanning period of each batch of targets in the target table; and traversing the navigation target table again, calculating a navigation display mark of the target table, setting the navigation display mark of the batch number corresponding to the maximum amplitude as 1,setting the rest matched batch numbers as reflection signals, setting the navigation display mark as 0, and sending the radiation source parameters of the batch number corresponding to the display mark as 1 to navigation display. According to the method, the accuracy of the sorting result is effectively improved.

Description

technical field [0001] The invention belongs to the field of radar reconnaissance electronic warfare signal processing, in particular to a navigation radar signal sorting method based on envelope analysis. Background technique [0002] The complex electromagnetic environment at sea is generally composed of two types of radar radiation sources, which are many and simple, and few and complex: one is a large number of navigation radar radiation sources in the form of simple signals, and the other is military complex system radar radiation sources. There are a large number of maritime navigation radar radiation sources, and they are all concentrated in a small frequency range. The navigation radar signals have serious frequency overlap and many reflectors. [0003] The research on the traditional radar signal sorting method began in the 1970s, and its representative sorting algorithms include sequence search method, small box matching method with parameter quantization tolerance...

Claims

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Application Information

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IPC IPC(8): G01S7/41
CPCG01S7/41Y02A90/10
Inventor 吴连慧宋新超秦长海陈旭王澍陈浩
Owner 扬州船用电子仪器研究所
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