Somewhat less old school

• Direct Sequence Spread Spectrum

• • Used in state of the art mid-to-late 90s wireless lan technology (e.g. 802.11b)
  • The information being modulated is multiplied together with a pseudo-random bit pattern and is sprayed across the entire-frequency range used by the carrier.
  • Looks a lot like FM except the edges are much more heavily used.
  • In the case of 802.11 the channel is 22Mhz wide.