Xilinx, Inc.

Stephen Summerfield

Christopher H Dick

Vincent C Barnes

A method of generating parameters for a predistortion circuit in an integrated circuit using a matrix is disclosed. The method comprises storing a first column of a first matrix; generating the remaining columns of the first matrix based upon the first column of the matrix; generating a plurality of rows of a second matrix by performing a first set of calculations; and generating the remaining rows of the second matrix by selectively shifting the first rows of the second matrix.

Method of and circuit for generating parameters for a predistortion circuit in an integrated circuit using a matrix

A circuit for receiving a sample of an input signal to be used to calculate parameters for a predistortion circuit in an integrated circuit is described. The circuit comprises a power measurement circuit coupled to receive the input signal; a first port of a dual port random access memory for receiving data associated with power of the input signal over a predetermined period of time; and a second port of a dual port random access memory for generating the data associated with the power of the input signal stored over the predetermined period of time. A method of receiving a sample of an input signal to be used to calculate parameters for a predistortion circuit in an integrated circuit is also described.

Method of and circuit for receiving a sample of an input signal to be used to calculate parameters for a predistortion circuit in an integrated circuit

A method of accepting a sample of an input signal to be used to calculate parameters for a predistortion circuit in an integrated circuit is disclosed. The method comprises accumulating data associated with an input signal over a period of time; detecting the sample of the input signal at a predetermined time; comparing the sample of the input signal to the accumulated data; and determining whether the sample of the input signal is acceptable to be used to calculate parameters for the predistortion circuit. A circuit for accepting a sample of an input signal to be used to calculate parameters for a predistortion circuit in an integrated circuit is also disclosed.

Method of and circuit for accepting a sample of an input signal to be used to calculate parameters for a predistortion circuit in an integrated circut

A method of adapting parameters for a predistortion circuit in an integrated circuit is disclosed. The method comprises receiving, at the predistortion circuit, an input signal to be amplified by a power amplifier; determining a value associated with an information tag for the input signal; applying parameters to the predistortion circuit based upon the determined value; receiving an output of the power amplifier at an input of the integrated circuit; comparing an output of the predistortion circuit with the output of the power amplifier; and generating updated parameters to be applied to the predistortion circuit. An integrated circuit having a circuit for adapting parameters for a predistortion circuit of the integrated circuit is also disclosed.

Method of and circuit for adapting parameters for a predistortion circuit in an integrated circuit

A method of generating parameters for a predistortion circuit in an integrated circuit is disclosed. The method comprises receiving, at the predistortion circuit, an input signal to be amplified by a power amplifier; receiving an output of the power amplifier at an input of the integrated circuit; comparing an output of the predistortion circuit with the output of the power amplifier; conforming the output of the power amplifier with the output of the predistortion circuit; and generating parameters to be applied to the predistortion circuit based upon the conformed output of the power amplifier and the predistortion circuit. An integrated circuit having a circuit for generating parameters for a predistortion circuit of the integrated circuit is also disclosed.

Method of and circuit for generating parameters for a predistortion circuit in an integrated circuit

An integrated circuit having a circuit for reducing distortion in a power amplifier is disclosed. The integrated circuit comprises a predistortion circuit coupled to receive a signal to be amplified; sample capture buffers coupled to an output of the predistortion circuit and an input/output port of the integrated circuit; and an estimator circuit coupled to the sample capture buffers, wherein the estimator circuit generates parameters for the predistortion circuit based upon the output of the predistortion circuit and an output of the power amplifier received at the input/output port of the integrated circuit. A method of reducing distortion in a power amplifier is also disclosed.

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San Jose, CA, United States of America

Stephen Summerfield