www.pudn.com > FCC_UWB.rar > cp0703_generate_mask.m

function [emissionmask]=cp0703_generate_mask(N,fs) 
     df=fs/N; 
     emissionmask=zeros(N/2); 
     n1=round(0.96e9/df); 
     n2=round(1.61e9/df); 
     n3=round(1.99e9/df); 
     n4=round(3.1e9/df); 
     n5=round(10.6e9/df); 
     a(1:n1)=-41.3; 
     b(1:(n2-n1))=-75.3; 
     c(1:(n3-n2))=-53.3; 
     d(1:(n4-n3))=-51.3; 
     e(1:(n5-n4))=-41.3; 
     f(1:(N/2-n5))=-51.3; 
     emissionmask=[a b c d e f]; 
     positivefrequency=linspace(0,fs/2,N/2); 
     semilogx(positivefrequency,emissionmask); 
     axis([8e8 20e9 -78 -40]);