选择三个不同频段的信号对其进行频谱分析，根据信号的频谱特征设计三个不同的数字滤波器，将三路信号合成一路信号，分析合成信号的时域和频域特点，然后将合成信号分别通过设计好的三个数字滤波器，分离出原来的三路信号，分析得到的三路信号的时域波形和频谱，与原始信号进行比较，说明频分复用的特点。-Choice of three different signal-band spectral analysis carried out, according to the characteristics of the

　针对一个匀速直线运动目标的跟踪设计最小二乘滤波器，了解跟踪滤波的基本方法以及参数估计方法的应用。-For a uniform linear least squares moving target tracking filter designed to learn the basic methods of tracking filter and parameter estimation method applied.

利用FIR滤波原理，设计了一个带通型的FIR滤波器，用于实现语音去噪。-According to the principles of FIR filtering,a type of bandpass FIR filter has been designed to achieve the goal of speech enhancement

设计满足下列条件的模拟BW型高通滤波器 fp 5kHz, fs 1kHz, Ap 1dB, As 40dB。-Designed to meet the following conditions simulate BW-type high-pass filter fp 5kHz, fs 1kHz, Ap 1dB, As 40dB.