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 Fourier transform in polar coordinates F(n）=|F(e四 Power spectrum P()=F()=R()+I2(u)( ) ( ) j ( ) F F e     = ( ) ( ) ( ) ( ) 2 2 2 P F R I     = = + 4. Fourier Transform of Functions of One Continuous Variable ◼ Representation of Fourier transform in polar coordinates ◼ Power spectrum