This method can not only minimize the stopband energy of the prototype filter , but also determines the inter symbol interference power and the transition band energy , which can be used to design prototype filters for both the critically sampled fmt system and the non - critically sampled fmt system 该方法不仅可以最小化原型滤波器的阻带能量,还界定了符号干扰功率、过渡带能量,适用于严格采样和非严格采样滤波多音调制系统。