Patent ID: 8140038

Claim:
An adaptive receiver for receiving a radio frequency (RF) signal and converting the RF signal at a frequency F RF toward an intermediate frequency (IF) signal at a frequency F IF,AD , the adaptive receiver comprising: a pair of band pass filters, each with a nominal center frequency at F IF , a two-dimensional look-up table configured to provide frequency offset (Δ f ) values of the center frequency of the band pass filters for environmental temperature and process corner variations; a temperature sensing device to provide temperature information; a micro controller configured to, based on the frequency offset (Δ f ) values from the look-up table, the temperature information from the temperature sensing device and pre-stored information on the process corner, estimate an adaptive intermediate frequency F IF,AD equal to the nominal center frequency of the band pass filter, F IF , plus the frequency offset Δ f ; and a local oscillator to generate sinusoidal signals at a frequency F LO equal to F RF minus F IF,AD .