Urgent-Can anyone help me implement this two-variable function in matlab??

Matlab experts,

I have a 2 variable function: dirac(x)*(2*pi*dirac(y)-sum(dirac(y-2*pi*n)) convolve with (sinc(x)*sinc(y)). The sum here is from -inf to inf and is wrt to n. This is a analytical Fourier Transform of an aperture function. What I need to do is to implement this function in matlab and then plot it in the x-y plane. Can anyone help me please??