Patent ID: 8451917

Claim:
A system for enabling a plurality of communication systems to share frequency spectrum, comprising: an incumbent communication system utilizing orthogonal frequency division multiplexing (OFDM); and a cognitive radio (CR) communication system comprising; a plurality of CR units comprising at least one CR subscriber and at least one CR base station, at least one of the plurality of CR units having an orthogonal frequency division multiplexing (OFDM) detection engine, the OFDM detection engine detecting the presence and absence of OFDM signals within the frequency spectrum and utilizing the detection of the presence of OFDM signals to determine the presence of the incumbent communication system or other CR system operating in a frequency spectrum of interest, the OFDM detection engine receiving and updating a channel list and configuration vector from the at least one CR base station so as not to interfere with the incumbent communication system wherein vector configuration data of the configuration vector comprises: delay values; number of delay multiplier (DM) units; and weighting coefficient data.