题目内容
采用双线性变换法设计一个巴特沃斯数字高通滤波器，技术指标为：通带下限频率为fpHz，阻带上限为fsHz，通带最大衰减为αpdB，阻带最小衰减为αsdB，采样周期为T，试写出设计的具体步骤。
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