Patent Document ID: 8432220
Application ID: 12976742
Patent Status: 1

Claim One:
1. A linearization device for a power amplifier using adaptive digital baseband predistortion, the linearization device comprising: a pre-inverse block receiving a complex discretized input signal {tilde over (x)} e (n) and restoring a complex predistorted signal {tilde over (x)} p (n) at an input of the power amplifier, wherein the pre-inverse block includes a first module and a second module receiving a modulus of the complex discretized input signal |{tilde over (x)} e (n)| at the input whose value is included in an amplitude domain varying between two minimum and maximum values A min and A max , the amplitude domain being split into a plurality of segments, the first module including a correspondence table associating with each value of the modulus of the complex discretized input signal |{tilde over (x)} e (n)| contained in a given segment, a predefined set of a plurality of parameters defining a parametric model implemented in the second module via a function Fj, the second module restoring a value F j |{tilde over (x)} e (n)|, the complex predistorted signal resulting from multiplying the complex discretized input signal {tilde over (x)} p (n) by the value F j (|{tilde over (x)} e (n)|), an identification of the pre-inverse block being based on an indirect architecture formed by an identification block arranged in parallel with the power amplifier, the identification block identifying the predefined set of the plurality of parameters for each segment of the amplitude domain of the modulus of the complex discretized input signal |{tilde over (x)} e (n)| by minimizing an error between the complex predistorted signal {tilde over (x)} p (n) and an output signal {tilde over (y)}(n) of the power amplifier in at least one iteration.