Invention Grant
- Patent Title: Methods for computing predistortion values for wireless systems
- Patent Title (中): 计算无线系统预失真值的方法
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Application No.: US14449976Application Date: 2014-08-01
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Publication No.: US09300333B2Publication Date: 2016-03-29
- Inventor: Gurusubrahmaniyan Subrahmaniyan Radhakrishnan
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Treyz Law Group, P.C.
- Agent Jason Tsai; Joseph F. Guihan
- Main IPC: H04B3/46
- IPC: H04B3/46 ; H04B1/04 ; H04W52/02

Abstract:
Methods for performing predistortion calibration on wireless communications circuitry are provided. The wireless communications circuitry may be adjusted using a digital gain setting and a radio gain index setting. A particular channel in a given band exhibiting the maximum dynamic range may be selected for measurement. Predistortion coefficient values may be computed based on measured results in the select channel. A power list may be obtained for the selected channel based on a maximum peak power level. A reference power list may then be obtained based on the minimum dynamic range in the given band. The predistortion coefficients associated with the selected channel may be translated from its power list to the reference power list. Predistortion coefficients for the remaining channels in the given band may similarly be computed by interpolating/extrapolating based on the values in their respective power lists and the reference power list.
Public/Granted literature
- US20160036471A1 Methods for Computing Predistortion Values for Wireless Systems Public/Granted day:2016-02-04
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