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Methods and apparatus for selecting between multiple carriers based on signal energy measurements

  • US 20050233746A1
  • Filed: 10/14/2004
  • Published: 10/20/2005
  • Est. Priority Date: 04/15/2004
  • Status: Active Grant
First Claim
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1. A communications method for use in a wireless terminal in an OFDM communication system, the method comprising:

  • receiving a first signal in a first frequency band, said first signal including a plurality of signal tones, each signal tone corresponding to a different frequency;

    performing a time to frequency conversion on said received signal to generate a set of signal components corresponding to different signal tones in the first frequency band;

    determining the energy of each of a plurality of different signal components which correspond to different signal tones within said first frequency band to generate a set of per signal tone energy values, each per signal tone energy value corresponding to a different frequency;

    detecting, from the per tone energy value of said signal components, a signal component corresponding to a beacon signal; and

    determining, based on the frequency of the signal component detected to correspond to a beacon signal, a carrier frequency corresponding to said beacon signal.

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