#### DTFT of Real Signals

The previous section established that the spectrum of every real signal satisfies(3.16) |

*I.e.*,

(3.17) |

In other terms, if a signal is real, then its spectrum is

*Hermitian*(``conjugate symmetric''). Hermitian spectra have the following equivalent characterizations:

- The real part is even, while the imaginary part is odd:

- The magnitude is even, while the phase is odd:

**Next Section:**

Real Even (or Odd) Signals