| This paper mainly studies the millimeter-wave active/passive combined detecting system based on divided-IF for runway recognition, and the system is demonstrated and parameters are fixed on. The paper contributes to the research of runway recognition.Firstly, the article presents the theories of the millimeter wave active/passive combined detecting system based on divided-IF. The parameters of system in the active /passive mode are assigned based on the system demand. The signal analysis of active/passive mode is accomplished, and we can describe the signals in detail.Secondly, the wavelet analysis and neural network arithmetic are introduced to the paper for target recognition in order to improve target recognition rate. And the paper designs the information fusion scheme based on wavelet neural network.Finally, the paper studies the signal processing of the detecting system , the key point of which is the design of intermediate frequency amplifiers. After debugging , the amplifiers meet the system demand. |
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