采用加法树设计8位乘法器，具有流水线结构7阶FIR滤波器，输入序列信号字长4位表示，并且是无符号数。(An adder tree is used to design the 8 bit multiplier, which has a pipelined 7 order FIR filter. The input sequence signal is 4 bits, and it is an unsigned number.)