雷達(dá)信號識別關(guān)鍵技術(shù)研究
[Abstract]:Radar signal recognition is a key signal processing process in electronic intelligence reconnaissance, and it is also a hot and difficult point in the research of electronic countermeasure signal processing. In the modern electronic warfare environment, radar signals are characterized by complex form, variable parameters and large frequency dynamic range. The dense and complex signal environment will lead to pulse arriving at the receiver at the same time or one after another and overlapping or overlapping together. Therefore, many researchers at home and abroad are devoted to research, analysis and extraction of effective signal features to achieve radar signal recognition. In this paper, the radar signal recognition technology is studied. The key technologies include signal sorting, repetition pattern identification and intra-pulse feature recognition. Based on the feature extraction algorithm of parameter dwell ratio, the tolerance parameter E of the algorithm is modified under the condition that the pulse loss rate is 60% and the false pulse is 5%. When modified to the PRI mean of 9, it can effectively identify five repetition modes. In view of the intra-pulse modulation feature recognition technology, using the decision tree criterion, the phase reconstruction algorithm, the moment kurtosis coefficient in frequency domain and the wavelet coefficient feature, the flow chart suitable for feature extraction in the pulse of mixed radar signal is designed. When the SNR is 5dB, it is proved that the flow chart can effectively separate the mixed radar signal and realize the feature recognition in the pulse of the radar signal.
【學(xué)位授予單位】:西安電子科技大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2014
【分類號】:TN957.51
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