r = rffilter (“FilterType”,“巴特沃斯”,“ResponseType”,“低通”,“实现”,“传递函数”,“PassbandFrequency”《外交政策》,…“PassbandAttenuation”据美联社,,“StopbandFrequency”Fs,“StopbandAttenuation”,);
过滤器的顺序设计滤波器
N = r.DesignData.FilterOrder;sprintf (计算滤波器的顺序是% d ',N)
ans = '计算过滤订单9的
频率为3.0103 dB
F_3dB = r.DesignData.PassbandFrequency / 1 e3;sprintf (频率为3.0103 dB % d kHz的F_3dB)