With the continuous development of new radar systems towards intelligence,the traditional PDW descriptors can no longer meet the needs of rapid identification and recognition of radar radiation source in com-plex electromagnetic environment.Therefore,the description of radar radiation sources needs to add dimensions to the original basis,forming a new feature description space.A new method for characterizing radar radiation sources based on task attributes is proposed.By constructing a universal feature library for radar radiation sourc-es,a transfer learning based radar radiation source characterization model is proposed to provide technical support for intelligent recognition and cognition of radar radiation sources.
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