Characteristic extraction method of radar in-pulse modulation signals

A feature extraction and internal modulation technology, applied in the field of signal feature extraction, can solve the problems of difficult extraction of edge information of time-frequency distribution images, insufficient mining of rich information of time-frequency distribution images, etc., to achieve high recognition rate and good robustness and noise immunity characteristics
CN101587186AInactive Publication Date: 2009-11-25南京宇音力新电子科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
南京宇音力新电子科技有限公司
Publication Date
2009-11-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a characteristic extraction method of radar in-pulse modulation signals. The characteristic extraction method of radar in-pulse modulation signals comprises the following steps: decomposing the time frequency of the received radar in-pulse modulation signals to obtain a corresponding time-frequency distribution image; and then, analyzing principal components of the time-frequency distribution image after two-dimensional wavelet discomposition to obtain characteristic parameters of each class of radar in-pulse modulation signals so as to construct a corresponding classifier. The extracted signal characteristic parameters have favorable robustness and stronger anti-noise capability, and the generated classifier can be utilized to obtain higher signal identification rate, therefore, the characteristic extraction method can be effectively applied to the identification of the radar in-pulse modulation signals.
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Description

technical field

[0001] The invention relates to a feature extraction method of a signal, in particular to a feature extraction method of a radar intrapulse modulation signal. Background technique

[0002] Radar intrapulse modulation refers to a specific modulation pattern adopted by radar to improve its detection performance and anti-jamming measures. With the continuous development of modern radar technology, more and more radars work with various complex intrapulse modulation methods, which brings new challenges to the detection, sorting and identification of radar signals. At present, the general methods of radar signal intrapulse modulation characteristic analysis are time domain autocorrelation method, modulation domain analysis method, spectral correlation method, time domain cepstrum method, etc. The characteristics of the signals are clearly distinguished, so as to achieve the purpose of signal classification and recognition, so they are interpenetrated and interrel...

Claims

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