×

OFDMA based on cognitive radio

  • US 20070248173A1
  • Filed: 04/25/2006
  • Published: 10/25/2007
  • Est. Priority Date: 04/25/2006
  • Status: Active Grant
First Claim
Patent Images

1. A method of wireless communication between two or more devices at a minimum data rate, the method comprising the acts of:

  • a) determining a minimum number of OFDM subchannels and energy threshold for each subchannel necessary to achieve the minimum data rate; and

    b) tuning a transmitter to a set of one or more subchannels; and

    c) performing energy detection on one or more subchannels from said set of subchannels; and

    d) dropping any subchannels from said set of subchannels whose energy level exceeds a threshold; and

    e) adding one or more subchannels to said set of subchannels for each subchannel that has been dropped; and

    f) repeating acts (c) through (e) until the minimum number of subchannels whose energy is below the threshold has been selected.

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