包括单边带、双边带、载波抑制及四倍频,最终的权值矩阵就是滤波器的系数，窗函数法设计一个数字带通FIR滤波器。- Including single sideband, double sideband, suppressed carrier and quadruple, The final weight matrix is ??the filter coefficient, A window function design FIR digital band-pass filter.