- Patent Title: Method of and circuit for predistortion for a cable TV amplifier
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Application No.: US16142295Application Date: 2018-09-26
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Publication No.: US10944444B2Publication Date: 2021-03-09
- Inventor: Christopher H. Dick , Hongzhi Zhao , Hemang M. Parekh , Xiaohan Chen
- Applicant: Xilinx, Inc.
- Applicant Address: US CA San Jose
- Assignee: Xilinx, Inc.
- Current Assignee: Xilinx, Inc.
- Current Assignee Address: US CA San Jose
- Agency: Haynes and Boone, LLP
- Main IPC: H04B3/06
- IPC: H04B3/06 ; H04B1/04 ; H04N7/10 ; H04L25/03

Abstract:
A digital predistortion (DPD) system includes an input configured to receive a DPD input signal. In some embodiments, a non-linear datapath is coupled to the input, where the non-linear datapath includes a plurality of parallel datapath elements each coupled to the input. By way of example, each of the plurality of parallel datapath elements is configured to add a different inverse non-linear component to the DPD input signal corresponding to a non-linear component of an amplifier. In various examples, a first combiner combines an output of each of the plurality of datapath elements to generate a first predistortion signal. In some embodiments, the DPD system further includes a linear datapath coupled to the input in parallel with the non-linear datapath to generate a second predistortion signal. In addition, a second combiner combines the first predistortion signal and the second predistortion signal to generate a DPD output signal.
Public/Granted literature
- US20200099416A1 METHOD OF AND CIRCUIT FOR PREDISTORTION FOR A CABLE TV AMPLIFIER Public/Granted day:2020-03-26
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