一、方案选择1.数字幅频均衡方案选用FIR滤波器,设计方法以直接逼近所需离散时间系统的频率响应为基础,它几乎完全限于离散时间滤波器的实现问题。所设计出来的系统也具有线性相位,不存在相位失真。FIR滤波器的设计方法有多种,频域采样的设计方法可对局部频谱进行整形,适合幅频均衡的应用。 First, the program options 1 digital amplitude-frequency balance scheme using FIR filter, the design method to direct approximation of the required discrete-time system based on the frequency response, which is almost entirely limited to discrete-time filter implementation. The designed system also has a linear phase, there is no phase distortion. There are many design methods of FIR filter. The design method of frequency domain sampling can shape the local spectrum for the application of amplitude-frequency balance.