Patent Document ID: 20120007672
Application ID: 12976742
Patent Flag: 0

Claim One:
1 - A linearization device for a power amplifier using adaptive digital baseband predistortion, 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 the power amplifier input, wherein the pre-inverse block includes a first module and a second module receiving the modulus of the complex 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 complex input signal modulus |{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 input signal {tilde over (x)} e (n) by the value F j (|{tilde over (x)} e (n)|), the 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 sets of parameters for each segment of the amplitude domain of the complex input signal modulus |{tilde over (x)} e (n)| by minimizing the error between the input signal {tilde over (x)} p (n) and the output signal {tilde over (y)}(n) of the power amplifier in at least one iteration.