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- Title
基于参数选择的数字预失真处理.
- Authors
缪 翔; 万发雨; 王 磊; 李彬鸿
- Abstract
For digital predistortion of a power amplifier(PA), its precision is determined by the order of included memory polynomial directly, and higher-order polynomial is required in the digital predistortion for complex PA, which will lead to enormous calculation. To solve this problem, this paper proposes a new digital predistortion method with parameter-selecting and applies the low-order polynomial to complex digital predistortion to avoid increasing calculation. The proposed method is simulated with the collected data from a real PA, and it is confirmed that the proposed method provides higher precision than common ways with the same polynomial order. By setting orthogonal frequency division multiplexing(OFDM) signal as input and simulating the predistortion structure, the adjacent channel power ratio(ACPR) of PA's output decreases by 21 dB, which is 6 dB better than that of the common ways.
- Subjects
ORTHOGONAL frequency division multiplexing; POWER amplifiers; ORTHOGONALIZATION; BACOPA monnieri; POLYNOMIALS; COMMON good
- Publication
Telecommunication Engineering, 2019, Vol 59, Issue 12, p1464
- ISSN
1001-893X
- Publication type
Article
- DOI
10.3969/j.issn.1001-893x.2019.12.015