Invention Grant
- Patent Title: Adaptive linearizer with narrowband feedback path
- Patent Title (中): 具有窄带反馈路径的自适应线性化
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Application No.: US13669519Application Date: 2012-11-06
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Publication No.: US08836426B2Publication Date: 2014-09-16
- Inventor: Alexander Nikolaevich Lozhkin
- Applicant: Fujitsu Limited
- Applicant Address: JP Kawasaki
- Assignee: Fujitsu Limited
- Current Assignee: Fujitsu Limited
- Current Assignee Address: JP Kawasaki
- Agency: Fujitsu Patent Center
- Priority: JP2011-251130 20111116
- Main IPC: H03F1/26
- IPC: H03F1/26 ; H03F3/24 ; H03F1/32
Abstract:
An ISI Replica unit is provided, which produces interference components similar to one due to LPF into the output of HPA MODEL unit. An HPA MODEL unit models the characteristic of HPA using the output signal of the predistorter and an error signal obtained by subtracting a feedback signal from the output of the ISI Replica so that the error signal approaches zero. The feedback signal is used after filtration by LPF, thereby including interference components. The error signal obtained by the feedback signal after LPF and the output signal of ISI Replica unit includes few interference components, thereby modeling by the HPA MODEL unit becomes accurate and the linearization performances become better.
Public/Granted literature
- US20130120062A1 ADAPTIVE LINEARIZER WITH NARROWBAND FEEDBACK PATH Public/Granted day:2013-05-16
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