Patent ID: 9712121
Date: 2017-07-18
CPC Classifications: H03F,H04B,H04L

Claim:
1. A circuit for linearizing an output signal Sout produced by a non-linear component based on an input signal (x(n)), the circuit comprising: a primary pre-distorter module configured to generate a pre-distorted signal (y(n)) based on the input signal (x(n)) and a primary pre-distortion function g( ) parameterized by a pre-distortion parameter (λ an estimation module configured to receive samples (z(n)) of the output signal Sout, and to determine the pre-distortion parameter (λ wherein the estimation module comprises a secondary pre-distorter module configured to: generate a secondary pre-distorter output signal (r(n)) based on a secondary pre-distortion function g′( )and the samples (z(n)) of the output signal Sout, and determine the pre-distortion parameter (Ak) based on a previously determined pre-distortion parameter stored on a data storage, the secondary pre-distorter output signal (r(n)) and the pre-distorted signal (y(n)) provided by the primary pre-distorted module, wherein the determining comprises correlating the input signal (x(n)) with an error signal between the pre-distorted signal (y(n)) and the secondary pre-distorter output signal (r(n)).