Patent ID: 8712354

Claim:
An integrated radio receiver comprising: a receive antenna interface; an audio output interface; receive path circuits coupled to the receive antenna interface and audio output interface, wherein the receive path circuits include a receive tuner having a tunable receiving frequency and a receive digital-signal-processing block having controllable channel filtering; a scan system operative to receive signals within a band from the receive antenna interface and to generate a valid channel and a channel filtering control parameter; and a master finite state machine (FSM) coupled to the receive path circuits and the scan system to provide control and communication, wherein the valid channel generated by the scan system is applied to select a receiving frequency for the receive path circuits and the channel filtering control parameter is applied to control the channel filtering, and wherein the scan system comprises: a channel condition assessment (CCA) tuner coupled to the receive antenna interface and operative to tune within the band and operative to generate a tuned analog signal; a CCA analog-to-digital converter (ADC) coupled to the CCA tuner and operative to convert the tuned analog signal to a digital signal; an on-channel selection block responsive to the digital signal and operative to generate a on-channel signal by selecting only on-channel frequencies and substantially disregarding out-of-channel frequencies from the digital signal and operative to generate an on-channel figure of merit (FOM) representing a signal quality measurement of the on-channel signal; and an out-of-channel selection block responsive to the digital signal and operative to generate an out-of-channel signal by selecting only the out-of-channel frequencies and substantially disregarding the on-channel frequencies from the digital signal and operative to generate an out-of-channel FOM representing the signal quality measurement of the out-of-channel signal.