求翻译：在此基础上，提出了一种序贯的瞬时频率估计方法，提取了目标回波时频图中的微多普勒信号，提取了不同海面目标的微多普勒特征，最后提出了基于微多普勒特征的角反射器干扰鉴别方法，分别采用了某导引头外场实测数据和仿真数据进行验证，表明性能良好。是什么意思？

The micro Doppler characteristics of micro-Doppler frequency diagram On this basis, the instantaneous frequency of a sequential estimation method to extract the target echo signal, extract the different sea targets Finally based micro Doppler characteristics of the corner reflectors interference ide

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This based Shang, made has a sequence sequential of instantaneous frequency estimated method, extraction has target echo Shi frequency figure in the of micro-more general Doppler signal, extraction has different sea target of micro-more general Doppler features, last made has based on micro-more gen

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