Discrete-Time Fourier Transform X(eo )is called the magnitude function e(o)is called the phase function Both quantities are again real functions of o In many applications, the dtfT is called the Fourier spectrum Likewise, X(eJo ) and 0(o)are called the magnitude and phase spectra Copyright C 2001, S K MitraCopyright © 2001, S. K. Mitra 4 Discrete-Time Fourier Transform • is called the magnitude function • is called the phase function • Both quantities are again real functions of w • In many applications, the DTFT is called the Fourier spectrum • Likewise, and are called the magnitude and phase spectra ( ) jw X e (w) ( ) jw X e (w)