Patent ID: 8838038

Claim:
A system, comprising: a plurality of filter modules configured to respectively communicate with a plurality of antennas, wherein the plurality of filter modules are arranged in parallel, filter signals received via the plurality antennas from channels other than a communication channel of a first wireless network, wherein the communication channel of the first network includes a first channel and a second channel, and generate a plurality of signals; a sensing module configured to sense, based on the plurality of signals, whether radio frequency signals from a second network are present in at least one of the first channel and the second channel, and generate a plurality of control signals indicating presence or absence of the radio frequency signals in at least one of the first channel and the second channel; and a channel identification module configured to determine, based on the plurality of control signals, that the communication channel is not available for communication in response to the radio frequency signals being present in the first channel, the communication channel is available for communication in response to the radio frequency signals being not present in both the first channel and the second channel, and the first channel is available for communication in response to the radio frequency signals being present only in the second channel.