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The paper presents the reasonable environment cognition model for multifunction phased array radar based on time-frequency analysis and high order spectra analysis. At first, typical radar waveforms for different functions are introduced. Aim to extract the signal modulation characteristics corresponding to special radar task, the WVD-Hough transform and Bispectrum estimation are proposed. The WVD-Hough...
This paper presents a task priority assignment model based on Gaussian Process (GP) multitask classification which resolve the problem of phased array radar resource scheduling in complex electromagnetic environment. According to the work mode and task of the phased array radar, a task model on GP multitask classifier was established and used to preprocess the factors of amount, position of geometry...
Multifunction radar has been applied broadly because of its great performance. But the multifunction radar has a wide variety of signal types. How to recognition of multifunction radar is the most puzzled aspect of the whole environment cognition. This paper presents a signal cognition algorithm based on wavelet transform used to analyze and estimate the modulation types of signals in complex electromagnetic...
A method based on Smoothness Pseudo Wigner-Ville distribution and kernel principle component analysis is proposed to extract features of radar emitter signals. Then, these discriminative and low dimensional features achieved were fed to the classifier which is designed based on fuzzy Support Vector Machines (SVMs). In simulation experiments, the classification of two-class LFM signals was compared...
In this paper, a novel method based on kernel principle component analysis is proposed to extract features of radar emitter signals image of Choi-Williams distribution. Then these discriminative and low dimensional features obtained were fed to the classifier designed for different radar LFM signals which is based on fuzzy support vector machines (FSVMs). In simulation experiments, the classifier...
In this paper, the modern radar signal waveforms are introduced. For improving the detection capability and reducing the probability of interception, the more complex signal waveforms are applied in the modern radar system. Some basic principles are provided in the design of the LPI signal waveforms. Some novel waveforms with complex modulation are introduced. The WVD-Hough transform are used to analysis...
In this paper, a novel feature extraction method for radar emitter signals is introduced. The modern radar signal waveforms are used for experiment simulation such as the linear frequency modulation, FSK and PSK-coded. The wavelet ridges and higher-order statistics are used to extract signal features. These features extracted by proposed methods are discriminative and suitable for radar emitter classification,...
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