5、willgetitachievedbasedonMATLAB.FinallywewillgettwoapplicationsofFFTandIFFTincludingraisedcosineroll-offandthespectrumanalyzingoftwodeterminedfunctiontoverifytheFFTandIFFTcorrectnessandsuperiorityrespectively.Keywords:MATLAB,FFT,IFFT,Raisedcosinefunction,Trigonometric, Tria