Method for predistorting signals for non-linear components in the presence of long term memory effects
AssigneeKeysight Technologies, Inc.
InventorJan Verspecht
Life of this patent
Estimating the term…
Abstract
A method and system for predistorting signals provides a test signal to model a non-linear component. Model kernels representative of static and dynamic parts of the model are extracted from an output of the non-linear component responsive to the test signal. The dynamic part represents memory effects of the non-linear component. The model kernels are then used to calculate an inverse memory model component model. An input signal is predistorted using the inverse memory model.
Claims26
A non-transitory computer readable medium that stores a program executable by a computer for predistorting signals, the computer readable medium comprising:
- a generating code segment for generating a test signal;
- a system model code segment for generating a system model of a system from an output signal of the system generated in response to the test signal, the system model including a dynamic part that characterizes memory effects of the system;
- a memory model code segment for generating an inverse memory model from the system model;
- and
- a predistorting code segment for predistorting an input signal using the inverse memory model,
- wherein the inverse memory model is insensitive to changes in modulation bandwidth of the input signal.
A method, comprising:
- generating a test signal;
- generating a system model of a system from an output signal of the system generated in response to the test signal, the system model including a dynamic part that characterizes memory effects of the system;
- generating an inverse memory model from the system model;
- and
- predistorting an input signal using the inverse memory model,
- wherein the inverse memory model is insensitive to changes in modulation bandwidth of the input signal.
A predistorting system comprising:
- an input device for receiving an input signal;
- a processing device configured to generate a system model of a system from an output signal of the system generated in response to a test signal and to generate an inverse memory model from the system model, wherein the system model includes a dynamic part that characterizes the memory effects of the system;
- and
- a predistorter configured to predistort the input signal using the inverse memory model,
- wherein the inverse memory model is insensitive to changes in modulation bandwidth of the input signal.
Dependencies are inferred from the claim text.