Title:
DIGITAL PREDISTORTION STRUCTURE FOR HYBRID LARGE-SCALE MIMO ARRAY BASED ON SPATIAL DOMAIN FEEDBACK
Document Type and Number:
WIPO Patent Application WO/2020/238208
Kind Code:
A1
Abstract:
Provided are a digital predistortion structure and method for a hybrid large-scale MIMO array based on spatial domain feedback. The digital predistortion structure comprises multiple sub arrays; each sub array comprises a digital domain portion that performs predistortion processing on an input signal according to a feedback signal so as to obtain a predistortion signal, and an analog domain portion that comprises an analog beamforming network, a transmitting unit, a near-field feedback unit or a far-field feedback unit, and a feedback signal synthesizer; the analog beamforming network performs processing on the predistortion signal; the transmitting unit transmits a processed predistortion signal; the near-field feedback unit or the far-field feedback unit receives a transmit signal of the transmitting unit to generate a receive signal; the feedback signal synthesizer receives the receive signal of the near-field feedback unit or the far-field feedback unit to obtain the feedback signal, and transmits same to the digital domain portion.
Inventors:
CHEN WENHUA (CN)
LIU XIN (CN)
LIU XIN (CN)
Application Number:
PCT/CN2019/130500
Publication Date:
December 03, 2020
Filing Date:
December 31, 2019
Export Citation:
Assignee:
UNIV TSINGHUA (CN)
International Classes:
H04B7/06
Foreign References:
| CN110190885A | 2019-08-30 | |||
| CN107566306A | 2018-01-09 | |||
| CN109617842A | 2019-04-12 | |||
| CN105556913A | 2016-05-04 | |||
| US20180183509A1 | 2018-06-28 |
Other References:
ZHAO XIA; LI ZHAN-NING: "Polynomial Model with Feedback for Digital Predistortion of Power Amplifiers", JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOMMUNICATIONS, vol. 40, no. 5, 31 October 2017 (2017-10-31), pages 75 - 81, XP009524798, ISSN: 1007-5321, DOI: 10.13190/j.jbupt.2017-054
Attorney, Agent or Firm:
CHINA SCIENCE PATENT & TRADEMARK AGENT LTD. (CN)
Download PDF:
Previous Patent: ENVIRONMENT-FRIENDLY HEAT PIPE WORKING FLUID
Next Patent: AUDIO PROCESSING METHOD, SYSTEM AND RELATED DEVICE
Next Patent: AUDIO PROCESSING METHOD, SYSTEM AND RELATED DEVICE