说明：  讨论了"’+,- 调制时应用不同类型和参数的滤波器对系统性能的影响/针对"’+,- 的特点.采用 了存储波形累加求和法来代替一般的滤波成形.提高了调制速度/并利用其相位对称的特点将波形存储表压 缩为原容量的"0$.有效地节约了存储空间
(Applications are discussed " ' +,- modulation type and parameters of different filters on the system performance/characteristics for " ' +,-. Waveforms using cumulative summation of storage instead of the general filter shape. Improved modulation Speed/and use the phase symmetry of the table compression waveform storage capacity for the original " 0 $. effectively saves storage space)