Method and system for quickly extracting unknown radar target pulse sequence
An extraction method and radar target technology, applied in radio wave measurement systems, instruments, etc., can solve the problems of reduced extraction accuracy, irregular RF parameter changes, and large amount of calculation.
Active Publication Date: 2020-09-04
NAT UNIV OF DEFENSE TECH
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[0004] 1) During the self-extraction of the pulse sample image, all the characteristic parameters should be calculated for the similarity measurement of the two pulses. For a radar signal with a random change in a certain characteristic parameter (such as the RF agile type), the RF parameter changes irregularly. The accuracy of the measurement is affected, reducing the accuracy of the extraction
[0005] 2) When matching two pulses, the similarity of all characteristic parameters is calculated every time, which requires a large amount of calculation and takes a long time
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[0077] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0078] This embodiment provides a fast extraction method for an unknown radar target pulse sequence, refer to figure 1 , the quick extraction method includes the following steps:
[0079] Step 1: Obtain an interleaved full pulse sequence.
[0080] The radar pulse descriptor in this embodiment includes signal azimuth of arrival (DOA) parameters, carrier frequency (RF) parameters, pulse width (PW) parameters and time of arrival (TOA) parameters. Mathematical Model of Full Pulse Sequence Y Expressed as:
[0081] ;
[0082] in, Y is the mathematical model of the full pulse sequence; y n for the first n The characteristic parameter vector of pulses, y n =[ x 1 ( n ), x 2 ( n ), x 3 ( n ), x 4 ( n )], x 1 ( n )~ x 4 ( n ) respectively n DOA parameter value, PW parameter value, RF parameter value and TOA ...
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The invention discloses a method for quickly extracting an unknown radar target pulse sequence. The method comprises the following steps: acquiring an interleaved full pulse sequence; obtaining a DOAparameter peak value of each pulse data in the interleaved full-pulse sequence and carrying out DOA blocking processing; obtaining a PW parameter peak value of each pulse data in each DOA block and carrying out PW block processing; obtaining an RF parameter peak value of each pulse data in each PW block and carrying out RF blocking; determining whether the absolute value of the difference betweenthe RF parameter value and the RF parameter peak value of the unknown radar target pulse is smaller than a threshold value or not, and if yes, carrying out RF-PRI projection sample image extraction and unknown radar target pulse matching processing sequentially on the first pulse data block; and if not, carrying out PRI projection sample image extraction and unknown radar target pulse matching processing on the second pulse data block in sequence. The invention further discloses a storage medium and a system. The pulse sample graph extracted by the method is high in accuracy, small in calculation amount and high in operation efficiency.
Description
technical field [0001] The invention belongs to the technical field of radar pulse stream processing, and in particular relates to a method and system for quickly extracting unknown radar target pulse sequences. Background technique [0002] In the dense radar pulse flow, quickly screen out the pulse signal in a certain working mode of the radar and obtain the signal parameters as comprehensive and accurate as possible, which can win precious time, and can quickly implement targeted interference on the target and update it in real time Information such as parameters, positions, activities, and power-on / off rules of key targets facilitates rapid identification of the threat level of radar targets and the situation of the electromagnetic environment, enabling rapid threat warning. [0003] For the situation that the type of radar signal contained in the full pulse data is unknown, related methods for rapid extraction of radar signals from existing radar signals, such as the ra...
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IPC IPC(8): G01S7/41G01S7/28
CPCG01S7/2813G01S7/41
Inventor 孟祥豪陈晶安永旺毛毅王红军段永胜李媛丽张奎王昊张坤峰
Owner NAT UNIV OF DEFENSE TECH