发明授权
US08633769B2 Dual loop adaptation digital predistortion architecture for power amplifiers
有权
用于功率放大器的双环适配数字预失真架构
- 专利标题： Dual loop adaptation digital predistortion architecture for power amplifiers
- 专利标题（中）： 用于功率放大器的双环适配数字预失真架构
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申请号： US13593693申请日： 2012-08-24
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公开(公告)号： US08633769B2公开(公告)日： 2014-01-21
- 发明人: Chunlong Bai , Yuxing Zhang , Sai Mohan Kilambi
- 申请人： Chunlong Bai , Yuxing Zhang , Sai Mohan Kilambi
- 申请人地址： SE Stockholm
- 专利权人： Telefonaktiebolaget L M Ericsson (publ)
- 当前专利权人： Telefonaktiebolaget L M Ericsson (publ)
- 当前专利权人地址： SE Stockholm
- 代理机构： Coats and Bennett PLLC
- 主分类号： H03F1/26
- IPC分类号： H03F1/26
摘要：
One or more embodiments of a method and apparatus taught herein provide a predistortion system to compensate for the non-linearity of a power amplifier. The system includes an outer predistorter, an inner predistorter, and a first adaptation circuit. The predistorter predistorts an input signal to generate a first output signal, and uses a first memory model that models power amplifier memory effects within a first range of time constants. The inner predistorter predistorts the first output signal to generate a second output signal, and uses a second memory model that models power amplifier memory effects within a second range of time constants that is greater than the first range of time constants. The second output signal is provided as an input to the power amplifier, and the first adaptation circuit adapts the outer predistorter responsive to feedback from the power amplifier.
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