DocumentCode :
1468958
Title :
Compensation for Power Amplifier Nonlinearity in the Presence of Local Oscillator Coupling Effects
Author :
Ahn, Seung Hyeok ; Choi, Sungho ; Jeong, Eui-Rim ; Lee, Yong H.
Author_Institution :
Dept. of Electr. Eng., KAIST (Korea Adv. Inst. of Sci. & Technol.), Daejeon, South Korea
Volume :
16
Issue :
5
fYear :
2012
fDate :
5/1/2012 12:00:00 AM
Firstpage :
600
Lastpage :
603
Abstract :
We consider the design of a digital predistortion (DPD) scheme when there is a crosstalk between a local oscillator (LO) and a power amplifier (PA) called LO self-coupling. We first develop a baseband equivalent model for a direct conversion transmitter afflicted by LO self-coupling. Based on this model, a two-stage process, consisting of a feedback equalizer (FBEQ) and DPD, is proposed for the joint compensation of PA nonlinearity and LO self-coupling. The advantage of the proposed DPD over conventional DPD is demonstrated through computer simulation.
Keywords :
crosstalk; distortion; oscillators; power amplifiers; baseband equivalent model; computer simulation; crosstalk; digital predistortion scheme; direct conversion transmitter; feedback equalizer; joint compensation; local oscillator self-coupling effect; power amplifier nonlinearity compensation; Baseband; Couplings; Equalizers; Local oscillators; Transceivers; Transmitters; Wireless LAN; Coupling; digital predistortion; local oscillator; nonlinear distortion; power amplifier;
fLanguage :
English
Journal_Title :
Communications Letters, IEEE
Publisher :
ieee
ISSN :
1089-7798
Type :
jour
DOI :
10.1109/LCOMM.2012.030912.112100
Filename :
6168866
Link To Document :
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