基于verilog的fir滤波器设计，用的并行结构。在前面基础上加入四级流水（加法器，并行乘法器，乘法结果相加两级），通过验证。-Verilog-based design of fir filter using the parallel architecture. In front of the basis of adding four water (adder, parallel multiplier, multiply the result of the sum of two), throu