电子科发女学光电科学与工程学院 SCHOOL OF OPTOELECTRONIC SCIENCE AND ENGINEERING OF UESTC 4.Fourier Transform of Functions of One Continuous Variable Representation of complex numbers F(4)=R(4)+jI(u) Magnitude(frequency spectrum) F(=VR()+IP(4) Phase angle I(四 R()F R jI (   ) = + ( ) ( ) ( ) ( ) ( ) 2 2 F R I    = + ( ) ( ) ( ) arctan I u R      =     4. Fourier Transform of Functions of One Continuous Variable ◼ Representation of complex numbers ◼ Magnitude (frequency spectrum) ◼ Phase angle