Patent ID: 7643812

Claim:
An apparatus for a radio receiver, the apparatus comprising: an RF processor providing a first IF output according to an RF signal received from an antenna; an RF/IF processor providing a second IF output from the first IF output according to an IF gain signal; an ADC for converting the second IF output to a digital output; a first signal processing pathway for processing the digital output of the ADC according to a first multiplexing method, and comprising a first DAGC for level-adjusting the digital output of the ADC according to a first DAGC signal; a second signal processing pathway for processing the digital output of the ADC according to a second multiplexing method, and comprising a second DAGC for level adjusting the digital output of the ADC according ton second DAGC signal; an IF gain decision circuit for determining an IF gain value for the RF/IF processor; a first DAGC control circuit for determining a first DAGC gain value for the first DAGC; a second DAGC control circuit for determining a second DAGC gain value for the second DAGC; and a gain distributor for controlling the IF gain signal, the first DAGC signal and the second DAGC signal according to the IF gain value, first DAGC gain value and second DAGC value, wherein the first multiplexing method is time-division multiplexing (TDM), and the second multiplexing method is coded orthogonal frequency-division multiplexing (COFDM).