Ultra-wideband time domain RCS measurement signal processing method based on Hilbert-Huang transform

The invention relates to an ultra-wideband time domain RCS measurement signal processing method based on Hilbert-Huang transform, and aims to solve the defect that the frequency domain measurement method has the disadvantages of cumbersome test steps, large test cost, and fluctuating test results since an existing RCS measurement method is difficult to find a suitable test environment. The methodcomprises the following steps of: performing empirical mode decomposition on an original radar echo signal to obtain all IMF components and residual components; calculating approximate entropy of theoriginal radar echo signal; and using the approximate entropy as a threshold, and superposing the obtained IMF components to reconstruct the original radar echo signal. The invention is suitable for accurate detections of the radar target RCS. 本发明涉及种基于Hilbert-Huang变换的超宽带时域RCS测量信号处理方法，是为了解决现有的RCS测量方法很难寻找到合适测试环境，因而导致频域测量方法存在测试步骤繁琐、测试成本较大、测试结果易波动等缺点而提出的，包括对原始雷达回波信号进行经验模态分解，得到所有IMF分量以及残差分量；计算所述原始雷达回波信号的近似熵；近似熵作为阈值，将前述得到的IMF分量进