Invention Grant
- Patent Title: Method of and circuit for predistortion for a power amplifier
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Application No.: US15354858Application Date: 2016-11-17
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Publication No.: US09866269B1Publication Date: 2018-01-09
- Inventor: Hongzhi Zhao , Christopher H. Dick , Hemang M. Parekh
- Applicant: Xilinx, Inc.
- Applicant Address: US CA San Jose
- Assignee: XILINX, INC.
- Current Assignee: XILINX, INC.
- Current Assignee Address: US CA San Jose
- Agent David O'Brien
- Main IPC: H04B1/62
- IPC: H04B1/62 ; H04L25/03

Abstract:
A digital predistortion (DPD) system includes an input configured to receive a DPD input signal. The DPD system includes a first predistortion circuit configured to provide a first signal path coupled to the input to generate a first predistortion signal. The first predistortion circuit includes a first infinite impulse response (IIR) filter. A second predistortion circuit is configured to provide a second signal path coupled to the input in parallel with the first signal path to generate a second predistortion signal. The second predistortion circuit includes a second IIR filter. A combiner circuit is configured to combine the first predistortion signal and the second predistortion signal to generate a DPD output signal.
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