Patent ID: 9366750
Filing Date: 2016-06-14
CPC Classification: G01S

Claim Text:
1. A system comprising: a radio frequency transceiver to receive a radio frequency signal on a first channel; an automatic gain control circuit having a gain, wherein the gain i) changes from a normal value in response to the radio frequency transceiver receiving the radio frequency signal, and ii) subsequently returns to the normal value after a period of time, and wherein the automatic gain control circuit is configured to determine a radio signal strength of the radio frequency signal based on the period of time taken by the gain of the automatic gain control circuit to return to the normal value; a clear channel assessment circuit to a radar detector configured to determine whether the radio signal strength of the radio frequency signal exceeds a predetermined threshold; a controller to, in response to i) the radio signal strength of the radio frequency signal exceeding the predetermined threshold and ii) the indication that the radio frequency signal is not a wireless data packet, a dynamic frequency selection circuit to change channel from the first channel to a second channel in response to the radio frequency signal being determined to be a chirp radar signal or a tone radar signal.