Adaptive digital pre-correction of nonlinearities introduced by power amplifiers
AssigneeAlcatel
InventorsAngelo Leva, Sergio Gulino, Gianluigi Redaelli, Arnaldo Spalvieri
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Abstract
A method is described for estimating at least the inverse amplitude characteristic in a high-power amplifier for transmission systems, wherein the estimation is carried out by estimation means receiving the signal samples, possibly demodulated, as inputs present at the input and at the output of the amplifier. The method is characterized in that estimation of the inverse amplitude characteristic occurs by way of a non-recursive algorithm and in that said non-recursive algorithm can be analytically translated into: if α≡(r0(t),A[r0(t)])∈{r(t),A[r(t)]}∀r0(t)∈[a,b]→β≡(A[r0(t)],r0(t))∈{R(t),A−1(R(t))}∀R0(t)∈[A(a),A(b)]
Claims10
A method of estimating at least the inverse amplitude characteristic in an amplifier for transmission systems, in which the estimation is carried out by estimator means receiving as inputs the signal samples, possibly demodulated, present both at the input and at the output of the amplifier, wherein the estimation of the inverse amplitude characteristic occurs through a non recursive algorithm.
A device for estimating at least the inverse amplitude characteristic in an amplifier for transmission systems, wherein said device comprises estimator means receiving as inputs the signal samples, possibly demodulated, present both at the input and at the output of the amplifier and wherein the estimation of the inverse amplitude characteristic occurs through a non recursive algorithm.
A linearizing device comprising a device for estimating at least the inverse amplitude characteristic in an amplifier for transmission systems, wherein said device comprises estimator means receiving as inputs the signal samples, possibly demodulated, present both at the input and at the output of the amplifier and wherein the estimation of the inverse amplitude characteristic occurs through a non recursive algorithm.
Dependencies are inferred from the claim text.