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function [ xc ] = env_uniform(variance, shape, power_db, show_out)

%UNIFORM_EN 此处显示有关此函数的摘要

% 此处显示详细说明

if (nargin==3)

show_out=0;

end

c=10^(power_db/10); % 这里是幅度——功率

xc=c + random('Normal',0,variance,1,shape);

if show_out==1

plot(10.*log(abs(xc))./log(10));

end

end