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在分析直升机噪声特性的基础上，利用子波变换对直升机所辐射的噪声信号进行特征提取，并采取ＢＰ网络分类器，成功地识别了干扰背景中的直升机目标，实际数据处理的结果证明了该方法的有效性。
Based on the analysis of helicopter noise characteristics, wavelet transform was used to extract the features of the helicopter noise signal and the BP network classifier was used to successfully identify the helicopter targets in the interference background. The actual data processing results show that the The effectiveness of the method.