Suppression of even-numbered harmonic distortion in a non-linear element
AssigneeInfineon Technologies AG
InventorVictor Dias
Life of this patent
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Abstract
In a method for suppression of even-numbered harmonic distortion which occurs in a non-linear element 4, a signal x(n) is linked to a pseudo random noise sequence r(n), and is thus spread, before passing through the non-linear element 4. After passing through the non-linear element 4, the signal y*(n) is once again linked to the pseudo random noise sequence r(n). The signal y*(n) is thus despread while, in contrast, even-numbered order harmonic elements are once again spread, and remain as broadband noise.
Claims20
A method for suppression of even-numbered harmonic distortion which occurs in a non-linear element, comprising the following steps:
- a first linking of a signal to a pseudo random noise sequence before it passes through the non-linear element;
- and
- a second linking of the signal to a sequence which is derived from the pseudo random noise sequence, in particular to the same pseudo random noise sequence, after it passes through the non-linear element wherein the even number harmonics are suppressed by spreading the even number harmonics over a broad bandwidth in the second linking.
An apparatus for suppression of even-numbered harmonic distortion which occurs in a non-linear element comprising:
- a pseudo random noise generator for production of a pseudo random noise sequence,
- a first logic unit which links the pseudo random noise sequence to a signal and produces an input signal for a non-linear element which receives the input signal produced in the first logic unit and emits an output signal, and
- a second logic unit, which links the output signal from the non-linear element to a sequence which is derived from the pseudo random noise sequence, in particular the same pseudo random noise sequence wherein the even number harmonics are suppressed by spreading the even number harmonics over a broad bandwidth.
A method for suppression of even-numbered harmonic distortion which occurs in a non-linear element, comprising the following steps:
- linking of a signal to a pseudo random noise sequence before it passes through the non-linear element;
- and
- linking of the signal to a sequence which is derived from the pseudo random noise sequence, in particular to the same pseudo random noise sequence, after it passes through the non-linear element, wherein the signal is spread by the first linking operation, and is despread by the second linking operation.
Dependencies are inferred from the claim text.