Title:
DIGITAL PRE-DISTORTION CIRCUIT, DIGITAL PRE-DISTORTION COEFFICIENT ACQUISITION METHOD AND RELATED DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/169997
Kind Code:
A1
Abstract:
The present application discloses a digital pre-distortion (DPD) circuit, a DPD coefficient acquisition method and a related device. Said circuit comprises: a DPD module, a power amplifier, a signal recovery circuit and a band-limited DPD coefficient extraction circuit, wherein an output signal of the DPD module is inputted into the power amplifier, an output signal of the power amplifier is inputted into the signal recovery circuit, an output signal of the signal recovery circuit is inputted into the band-limited DPD coefficient extraction circuit, and an output signal of the band-limited DPD coefficient extraction circuit is inputted into the DPD module; the band-limited DPD coefficient extraction circuit is configured to determine a DPD coefficient according to the output signal of the signal recovery circuit and a first input signal, wherein the first input signal comprises an input signal of the DPD module or the output signal of the DPD module. The present invention can extract a DPD coefficient by means of the band-limited DPD coefficient extraction circuit, thereby reducing a bandwidth during DPD coefficient extraction and reducing power consumption during DPD coefficient extraction.
Inventors:
LIU QIAO (CN)
Application Number:
PCT/CN2021/077667
Publication Date:
September 02, 2021
Filing Date:
February 24, 2021
Export Citation:
Assignee:
HUAWEI TECH CO LTD (CN)
International Classes:
H03F1/32
Foreign References:
| CN107659273A | 2018-02-02 | |||
| CN110166007A | 2019-08-23 | |||
| CN109889166A | 2019-06-14 | |||
| US20050255814A1 | 2005-11-17 | |||
| US20080095265A1 | 2008-04-24 | |||
| US20150180519A1 | 2015-06-25 |
Attorney, Agent or Firm:
SCIHEAD IP LAW FIRM (CN)
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