db2value.m

来自「里面囊括了基于matlab滤波器设计的各种.m文件」· M 代码 · 共 7 行

 
% Convert the db value to real value
% Compute the 10^x by using the taylor series

function f = db2value(x)
y = -x/20.0;
f=1+log(10)*y+(1/2*log(10)^2)*y^2+(1/6*log(10)^3)*y^3+(1/24*log(10)^4)*y^4+(1/120*log(10)^5)*y^5+(1/720*log(10)^6)*y^6+(1/5040*log(10)^7)*y^7;