信号经过功率谱运算并滤波后，成为加权的正弦信号的形式，再经过求对数和功率谱变换，就得到了表示直扩信号存在的脉冲输出-Signal after power spectrum operation and filtering, become weighted sine signal form, and then after for logarithmic and power spectral transformation, got said straight expanding signal exis