标签: windowed-sinc

Windowed-sincfiltersareusedtoseparateonebandoffrequenciesfromanother.Theyareverystable,producefewsurprises,andcanbepushedtoincredibleperformancelevels.Theseexceptionalfrequencydomaincharacteristicsareobtainedattheexpenseofpoorperformanceinthetimedomain,includingexcessiverippleandovershootinthestepresponse.Whencarriedoutbystandardconvolution,windowed-sincfiltersareeasytoprogram,butslowtoexecute.Chapter18showshowtheFFTcanbeusedtodramaticallyimprovethecomputationalspeedofthesefilters.CHAPTERWindowed-SincFilters16Windowed-sincfiltersareusedtoseparateonebandoffrequenciesfromanother.Theyareverystable,producefewsurprises,andcanbepushedtoincredibleperformancelevels.Theseexceptionalfrequencydomaincharacteristicsareobtainedattheexpenseofpoorperformanceinthetimedomain,includingexcessiverippleandovershootinthestepresponse.Whencarriedoutbystandardconvolution,windowed-sincfiltersareeasytoprogram,butslowtoexecute.Chapter18showshowtheFFTcanbeusedtodramaticallyimprovethecomputationalspeedofthesefilters.StrategyoftheWindowed-SincFigure16-1illustratestheideabehindthewindowed-sincfilter.In(a),thef……

Decisions,decisions,decisions!Withallthesefilterstochoosefrom,howdoyouknowwhichtouse?Thischapterisahead-to-headcompetitionbetweenfilters;we'llselectchampionsfromeachsideandletthemfightitout.Inthefirstmatch,digitalfiltersarepittedagainstanalogfilterstoseewhichtechnologyisbest.Inthesecondround,thewindowed-sincismatchedagainsttheChebyshevtofindthekingofthefrequencydomainfilters.Inthefinalbattle,themovingaveragefightsthesinglepolefilterforthetimedomainchampionship.Enoughtalk;letthecompetitionbegin!CHAPTERFilterComparison21Decisions,decisions,decisions!Withallthesefilterstochoosefrom,howdoyouknowwhichtouse?Thischapterisahead-to-headcompetitionbetweenfilters;we'llselectchampionsfromeachsideandletthemfightitout.Inthefirstmatch,digitalfiltersarepittedagainstanalogfilterstoseewhichtechnologyisbest.Inthesecondround,thewindowed-sincismatchedagainsttheChebyshevtofindthekingofthefrequencydomainfilters.Inthefinalbattle,themovingaveragefightsthesinglepolefilterforthetimedomainchampionship.Enoughtalk;letthecompetitionbegin!Match#1:Analogvs.DigitalFiltersMostdigitalsignalsoriginateinanalogelectronics.Ifthesignal……