Invention Grant
- Patent Title: Techniques for adaptive predistortion direct current offset correction in a transmitter
- Patent Title (中): 发射机中自适应预失真直流偏移校正技术
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Application No.: US12195910Application Date: 2008-08-21
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Publication No.: US08412132B2Publication Date: 2013-04-02
- Inventor: Clive K. Tang , Bing Xu
- Applicant: Clive K. Tang , Bing Xu
- Applicant Address: US TX Austin
- Assignee: Freescale Semiconductor, Inc.
- Current Assignee: Freescale Semiconductor, Inc.
- Current Assignee Address: US TX Austin
- Agency: Yudell Isidore Ng Russell PLLC
- Main IPC: H04B1/04
- IPC: H04B1/04
Abstract:
A technique for performing adaptive predistortion in a transmitter includes receiving, at a first input of an error signal unit, a delayed version of a baseband input signal. The technique also includes receiving, at a second input of the error signal unit, a power amplifier feedback signal from an output of a power amplifier. An input error signal that corresponds to a difference between the delayed version of the baseband input signal and the power amplifier feedback signal is then provided at an output of the error signal unit. The input error signal is then received at an input of a signal conditioner. An adjusted error signal that has a lower direct current offset than the input error signal is provided at an output of the signal conditioner.
Public/Granted literature
- US20100048149A1 Techniques for Adaptive Predistortion Direct Current Offset Correction in a Transmitter Public/Granted day:2010-02-25
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