Invention Grant
US09252821B2 Adaptive high-order nonlinear function approximation using time-domain volterra series to provide flexible high performance digital pre-distortion
有权
使用时域Volterra系列的自适应高阶非线性函数逼近提供灵活的高性能数字预失真
- Patent Title: Adaptive high-order nonlinear function approximation using time-domain volterra series to provide flexible high performance digital pre-distortion
- Patent Title (中): 使用时域Volterra系列的自适应高阶非线性函数逼近提供灵活的高性能数字预失真
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Application No.: US14318000Application Date: 2014-06-27
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Publication No.: US09252821B2Publication Date: 2016-02-02
- Inventor: Roi M. Shor , Avraham D. Gal , Peter Z. Rashev
- Applicant: Roi M. Shor , Avraham D. Gal , Peter Z. Rashev
- Applicant Address: US TX Austin
- Assignee: Freescale Semiconductor, Inc.
- Current Assignee: Freescale Semiconductor, Inc.
- Current Assignee Address: US TX Austin
- Agency: Terrile, Cannatti, Chambers & Holland, LLP
- Agent Michael Rocco Cannatti
- Main IPC: H04K1/02
- IPC: H04K1/02 ; H04L25/03 ; H04L25/49 ; H04B1/04 ; H04L25/10
Abstract:
A method and apparatus are used to predistort input signal samples according to Volterra Series Approximation Model using one or more digital predistortion blocks (300) having a plurality of predistorter cells (301-303), each including an input multiplication stage (366-367) for combining absolute sample values received from an absolute sample delay line (362) into a first stage output, a lookup table (368) connected to be addressed by the first stage output for generating an LUT output, and a plurality of output multiplication stages (371-372, 373-374) for combining the LUT output with samples received from the amplitude sample delay line (362) and signal sample delay line (363) to generate an output signal sample yQ from said predistorter cell, where the output signal samples yQ from the predistorter cells are combined at an output adder circuit (375) to generate one or more Volterra terms of a combined signal (yOUT[n]).
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