数字相关器在通信信号处理中实质是起到数字匹配滤波器的作用，它可对特定码序列进行相关处理，从而完成信号的解码，恢复出传送的信息。-Digital correlator signal processing in the communication play in essence a digital matched filter which it can be related to a specific code sequence processing, thereby completing the

根据M值的改变可以产生2、4、8、16PSK数字调制基带信号，且成形滤波器可任选升余弦、根升余弦、高斯。-M may be generated according to a change value 2,4,8,16PSK baseband digital modulation signal, and optionally raised cosine shaping filter, the root raised cosine, Gaussian.

设计一个IIR滤波器，先设计模拟滤波器，再采用脉冲响应不变法和双线性变换法变换为数字滤波器-A IIR filter design, to design analog filter, then using constant impulse response and bilinear transform into a digital filter

用窗函数（矩形窗、汉宁窗、海明窗和布莱克曼窗）法设计FIR数字滤波器-Using the window function (rectangular window and hanning window, hamming window and blackman window) method to design FIR digital filter