【摘要】 针对MR/GPS制导火箭弹测量的地磁信号较弱、附加干扰噪声大的特点,运用小波分析的方法,设计了小波滤波器。提出对含脉冲干扰多的信号先采用中值滤波,再采用小波强制滤波的方法。仿真结果表明,该方法算法简单、易于实现。用小波变换处理后的地磁测量信号,与用FFT数字滤波器或数据平滑方法相比,不仅滤波效果更为理想,而且滤波后的信号能量损失很小。更多还原

【Abstract】 Aimed at the poor geomagnetic signal with a big interference noise measured in the MR/GPS guidance system, the wavelet filter is designed by the wavelet analysis method. In filtering, the medium filtering is first adopted to analyze the signal with much impulsive interference, then wavelet is compliably filtered. Simulation results show that the method is simple and easy to be realized, the filtering results of the geomagnetic signal by the wavelet transform are more ideal compared with the FFT digital filter or the data smooth method. And the energy loss of the filtered signal is little.更多还原