主要讲述了FPGA在数字滤波器 特别是FIR滤波器方面的设计 ，仿真以及实现，还分别介绍了乘法 加法的原理及框图-Focuses on the FPGA in the digital filter in particular aspects of FIR filter design, simulation and realization, but also introduced the principle of addition and multiplication diagram