发明授权
- 专利标题: Frequency selective predistortion
- 专利标题(中): 频率选择性预失真
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申请号: US14548129申请日: 2014-11-19
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公开(公告)号: US09276784B2公开(公告)日: 2016-03-01
- 发明人: Andrew F. Folkmann , Nadim Khlat
- 申请人: RF Micro Devices, Inc.
- 申请人地址: US NC Greensboro
- 专利权人: RF Micro Devices, Inc.
- 当前专利权人: RF Micro Devices, Inc.
- 当前专利权人地址: US NC Greensboro
- 代理机构: Withrow & Terranova, P.L.L.C.
- 主分类号: H04K1/02
- IPC分类号: H04K1/02 ; H04L25/03 ; H04L25/49 ; H04L25/08 ; H03F3/19 ; H03F3/24 ; H03F1/32 ; H03F1/02
摘要:
A baseband PA predistortion module, which includes a baseband combiner, a baseband PA correction circuit, and a baseband filter, is disclosed. The baseband PA correction circuit replicates behavior of an RF PA by processing a modulation data signal to provide a predistortion data signal. The behavior of the RF PA includes distortion. The modulation data signal is representative of an RF input signal to an RF PA and the predistortion data signal is representative of a correction needed at an output of the RF PA. The baseband filter receives and filters the predistortion data signal to provide a reduced predistortion data signal, such that a low frequency content of the reduced predistortion data signal is less than a low frequency content of the predistortion data signal. The baseband combiner receives and combines the modulation data signal and the reduced predistortion data signal to provide a baseband transmit signal.
公开/授权文献
- US20150139359A1 FREQUENCY SELECTIVE PREDISTORTION 公开/授权日:2015-05-21