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Re: Filtering of the higher frequency terms.
Well, I am not a Mathematica Expert but still... you can use simplify in Mathematica... What I got is this: (G^2 Sin[ptx - td w + rtx w1 + t (w - w1 - w2) + rdtx w2 + rtx w2 - wt])/(4 K^2) then I think you can use Perl Script... If I find something really useful, I will tell you... Meanwhile, what you can try is solve for x==0, so you will find poles and zeros, and then designing a filter should be straightforward... Bye.