Open AccessDual‐feedback digital linearisation structure with phase noise mitigation
Author(s) -
Liu Ying,
Quan Xin,
Pan Wensheng,
Tang Youxi
Publication year - 2016
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2016.0046
Subject(s) - predistortion , phase noise , electronic engineering , noise (video) , amplifier , computer science , power (physics) , control theory (sociology) , engineering , physics , artificial intelligence , control (management) , cmos , quantum mechanics , image (mathematics)
A digital predistortion (DPD) architecture is proposed to mitigate the phase noise of the local oscillator (LO). In this architecture, a novel dual‐feedback structure is designed to simultaneously capture the input and output signals of the power amplifier (PA) to perform the PA modelling and DPD linearisation, and thus relax the requirement on the LO phase noise. Experimental results validate the superior performances of the proposed linearisation architecture over the conventional DPD with LO phase noise. It is verified that the proposed DPD can achieve satisfactory performances even with low‐quality LOs of high phase noise levels.