×

Systems and method for orthogonal frequency divisional multiplexing

  • US 8,089,853 B2
  • Filed: 10/29/2007
  • Issued: 01/03/2012
  • Est. Priority Date: 02/06/1995
  • Status: Expired due to Fees
First Claim
Patent Images

1. A multi-carrier modem, the modem comprising:

  • a receiver configured to de-modulate symbols from at least one of a plurality of spectrally overlapping carrier signals;

    a transmitter configured to modulate symbols onto at least one of a plurality of the spectrally overlapping carrier signals;

    a processor coupled to the transmitter, wherein the processor outputs data for transmission by the transmitter, wherein the processor applies an inverse Fourier transform to the data transmitted by the transmitter;

    a controller programmed to instruct the receiver to scan a first range of the plurality of spectrally overlapping carrier signals for a first time period, wherein when an predetermined identifier is not received during the first time period, the controller is programmed to instruct the receiver to scan a second range of the plurality of spectrally overlapping carrier signals.

View all claims
  • 3 Assignments
Timeline View
Assignment View
    ×
    ×