Patent ID: 7933344

Claim:
A method of wireless communication between two or more devices at a data rate, the method comprising: a) receiving a request for communication at the data rate; b) determining a minimum number of OFDM subchannels and energy threshold for each subchannel necessary to achieve the data rate; and c) selecting a set of the OFDM subchannels; d) tuning a transmitter to one or more of the subchannels in the set; and e) performing energy detection on one or more subchannels from said set of OFDM subchannels; and f) dropping any subchannels from said set of OFDM subchannels whose energy level exceeds the threshold; and g) comparing the number of OFDM subchannels in the set after dropping in (f) to the determined minimum number of OFDM subchannels; and h) when the comparing in (g) indicates that the set contains less than the determined minimum number of OFDM subchannels, adding one or more subchannels to said set of OFDM subchannels; and i) repeating (f) through (h) until the comparing in (g) indicates that set contains the determined minimum number of OFDM subchannels; and j) transmitting on a channel consisting of the set of OFDM subchannels.