Invention Grant
- Patent Title: Digital hybrid mode power amplifier system
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Application No.: US14271881Application Date: 2014-05-07
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Publication No.: US09768739B2Publication Date: 2017-09-19
- Inventor: Wan Jong Kim , Kyoung Joon Cho , Shawn Patrick Stapleton , Jong Heon Kim , Dali Yang
- Applicant: DALI SYSTEMS CO. LTD.
- Applicant Address: KY George Town
- Assignee: Dali Systems Co. Ltd.
- Current Assignee: Dali Systems Co. Ltd.
- Current Assignee Address: KY George Town
- Agency: Kilpatrick Townsend & Stockton LLP
- Main IPC: H04B1/04
- IPC: H04B1/04 ; H03F1/32 ; H03F3/24 ; H03F3/19 ; H03F3/20

Abstract:
A RF-digital hybrid mode power amplifier system for achieving high efficiency and high linearity in wideband communication systems is disclosed. The present invention is based on the method of adaptive digital predistortion to linearize a power amplifier in the RF domain. The power amplifier characteristics such as variation of linearity and asymmetric distortion of the amplifier output signal are monitored by the narrowband feedback path and controlled by the adaptation algorithm in a digital module. Therefore, the present invention could compensate the nonlinearities as well as memory effects of the power amplifier systems and also improve performances, in terms of power added efficiency, adjacent channel leakage ratio and peak-to-average power ratio. The present disclosure enables a power amplifier system to be field reconfigurable and support multi-modulation schemes (modulation agnostic), multi-carriers and multi-channels. As a result, the digital hybrid mode power amplifier system is particularly suitable for wireless transmission systems, such as base-stations, repeaters, and indoor signal coverage systems, where baseband I-Q signal information is not readily available.
Public/Granted literature
- US20140327481A1 DIGITAL HYBRID MODE POWER AMPLIFIER SYSTEM Public/Granted day:2014-11-06
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