.3 Mm Band Transient Signal Acquisition And Processing

This paper is a part of the important national defence research project-Research on the technique of three millimeter pulsed Radar. In this paper, the problem of the transient signal sampling and disposing of three millimeter wave band is systematically investigated.According to the practical condition, a feasible collecting scheme is proposed, and an economical collecting system of the transient signal of millimeter wave is designed and completed, which supplied many real datum for later work in the paper.Wavelet analysis and neural network are introduced to the target recognition of transient signal in the paper, in order to extract the information that can reflect target in the transient signal of millimeter wave and raise the recognition rate of target. At first, all levels energy of wavelet decomposed in the transient are extracted by the means of wavelet analysis, then the extracted feature vectors are classified with RBF neural network. A ameliorating arithmetic is taken on the RBF neural network of RBF center to further improve the classifying stability, in the end, which achieves satisfied recognition results.The transient signal collecting system which is constructed in the paper supplies convenience for the research of the target recognition of millimeter radar. A hopeful new way is explored for extracting feature of target and raising the target recognition rates by combined wavelet analysis with neural network.