Title :
Adaptive calibration method for AM/PM distortion in nonlinear devices
Author :
Han, Sang-Min ; Popov, Oleg ; Park, Sun-Ju ; Ahn, Dal ; Lim, Jongsik ; Yoon, Won-Sang ; Pyo, Seongmin ; Kim, Young-Sik
Author_Institution :
Dept. of Info. & Comm. Eng., Soonchunhyang Univ., Asan, South Korea
fDate :
Jan. 9 2009-Dec. 11 2009
Abstract :
A novel adaptive phase calibration method is proposed for nonlinear amplifiers. Based on the adaptive process of simple phase vector calculations, the AM/PM distortion can be significantly reduced for various input power. The performance of the proposed method is evaluated for up to 80% improvements in AM/PM distortions compared with the distortion of a conventional amplifier. Moreover, by means of an additional envelope-compensation technique, the improvement of the adjacent channel power ratio (ACPR) is presented.
Keywords :
calibration; intermodulation distortion; power amplifiers; AM-PM distortion; adaptive phase calibration method; adjacent channel power ratio; envelope-compensation technique; nonlinear amplifiers; nonlinear devices; various input power; Calibration; Digital signal processing; Nonlinear distortion; Peak to average power ratio; Phase distortion; Phase measurement; RF signals; Radio frequency; Research and development; Silicon;
Conference_Titel :
Radio-Frequency Integration Technology, 2009. RFIT 2009. IEEE International Symposium on
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-5031-2
Electronic_ISBN :
978-1-4244-5032-9
DOI :
10.1109/RFIT.2009.5383748
