Alex- > I was posting to GNURadio about an year ago but I got busy and then I > stopped. I > have again started reading about GNURadio and hope to devote my free time this > entire year on GNURadio. > > So I have started reading Discrete Time Signal Processing by Oppenheim / > Schafer / > Buck. > > Chapter 4/ Page 168 says : - > > x_s(t)=x_c(t)s(t) > =x_c(t) Sigma ( from n = -inf to inf ) [ delta (t-nT) ] > > Through the sifting property of the impulse function , x_s(t) can be > expressed as : > > x_s(t) = Sigma (from - inf to inf ) [ x_c(nT) delta ( t-nT) ] > > Now this version of the sifting property is for the DISCRETE impulse function > NOT > the continuous Dirac delta function, but just before the discussion starts it > says > that delta(t) is the unit impulse function or the Dirac delta function. Is > this a > typo ? Shouled this have been the discrete delta function? If it is'nt, how > do the > above steps hold?
Well, if you have the first printing, you can check here first: ftp://ftp.prenhall.com/pub/esm/electrical_and_computer_engineering.s-045/oppenheim/DTSP/errata1pph.pdf But otherwise, my comment would be... a typo in an Oppenheim & Schafer book? 9 years after being published and after countless peer reviews? And you found it? One thing for sure is you're not lacking audacity and enthusiasm. Keep going. -Jeff _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio