Patent ID: 7974592

Claim:
Method of processing a signal in a transmission chain comprising: a power amplifier adapted for receiving as input a signal to be amplified S W (t) and adapted for providing as output an amplified signal D W (t); a predistortion module comprising, on the one hand, a linearization unit adapted for applying a predistortion coefficient W(t) to an input signal S(t), and, on the other hand, a unit for determining said predistortion coefficient; said processing method comprising the following steps implemented at the level of the predistortion module: /a/ at the level of the unit for determining the predistortion coefficient, receiving, on the one hand, the input signal S(t) and, on the other hand, the amplified signal D W (t) through a return pathway, and determining the predistortion coefficient on the basis of a comparison between the input signal S(t) and the amplified signal D W (t); /b/ at the level of the linearization unit, applying the predistortion coefficient W(t) to the input signal S(t), so as to provide as output the signal to be amplified D W (t); in which the predistortion coefficient W(t) is determined, in step /a/, on the basis of a first-order approximation of the input signal.