【摘要】 根据无线电引信回波多普勒信号功率主要集中在低频部分的特点,对淹没在噪声中的无线电引信回波信号进行小波分解,提取低频段不同频带内信号能量作为特征,用Fisher判别方法对目标进行检测。针对不同信噪比,对某典型无线电引信回波信号进行定量研究,实验结果表明该方法是有效的。更多还原

【Abstract】 Feature extraction of radio fuze signal using wavelet transform is discussed in this paper. The signal is first decomposed by wavelet transform,and on the basis,the decomposed coefficicients are reconstructed to form a new time series,from which some energy parameters can be extracted by time-domain analysis. The target signal is detected by Fisher discrimination criterion. The effectiveness of the method is verified by a typical radio fuze signals with different signal to noise ratio( SNR).更多还原