Patent ID: 8214420

Claim:
A method of digitizing an analogical signal comprising a data signal in a frequency channel, comprising the steps of: receiving ( 40 , 12 ) said analogical signal, amplifying ( 42 , 18 ) said received analogical signal to obtain an amplified signal having a power (P whole ), filtering ( 46 , 20 ) said amplified signal to cut out frequencies outside the frequency channel of the data signal and to obtain a filtered analogical signal, converting ( 48 , 24 ) said filtered analogical signal into a digital signal, said digital signal having a power (P partial ), measuring ( 44 , 32 ) the power (P whole ) of the amplified signal, after amplification ( 42 ) and before filtering ( 46 ), determining ( 56 , 26 ) an amplification control signal (C 18 ) for the amplification ( 42 ) of the received analogical signal as a function of the power (P whole ) of the amplified signal, amplifying ( 47 , 22 ) the filtered analogical signal before conversion ( 48 ), computing ( 50 , 30 A) a feature of the received analogical signal representative of an amplitude distribution of the received analogical signal, computing ( 52 , 30 B) a reference optimal power (P 0 ) of the power (P partial ) of the digital signal as a function of said feature, and determining ( 56 , 26 ) an amplification control signal (C 22 ) for the amplification ( 47 ) of the filtered signal as a function of said reference optimal power (P 0 ).