more errors.... whoops! > sinc(t)=sin(pi*t)/t sinc(t)=sin(pi*t)/(pi*t) > (2/N)*[1+sum{ j=1:N/2 ; cos(pi*t*fs*j) } (2/N)*[0.5+sum{ j=1:N/2 ; cos(pi*t*fs*j) } ]