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Concurrent dual‐band digital predistortion method for wideband power amplifier with large carrier spacing two‐carrier signal
Author(s) -
Xiang Haixia,
Yu Cuiping,
Gao Jinchun,
Li Shulan,
Wu Yongle,
Su Ming,
Liu Yuanan
Publication year - 2014
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.28136
Subject(s) - predistortion , adjacent channel power ratio , dbc , wideband , adjacent channel , amplifier , multi band device , electronic engineering , offset (computer science) , electrical engineering , linearization , engineering , cmos , physics , computer science , nonlinear system , quantum mechanics , antenna (radio) , programming language
A concurrent dual‐band three‐layered biased memory polynomial (DB‐TLBMP) model is proposed for the linearization of wideband power amplifiers driven by large carrier spacing two‐carrier signals. The DB‐TLBMP model is derived by extending the TLBMP model to the concurrent dual‐band mode, and the least square algorithm is used for coefficients extraction of each layer. Using a two‐carrier wideband code division multiple access signal with 40‐MHz carrier spacing at 2.65 GHz, whose peak‐to‐average power ratio is 7.74 dB, the adjacent channel leakage ratios (ACLRs) improvement of more than 17 dBc are achieved to give the ACLRs below −50 dBc at the offset of ±5 MHz and an average output power of 37 dBm. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:594–597, 2014
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