Title :
Performance Improvement of Power Amplifiers with Digital Linearization Technology
Author :
Jiang, Wei ; Xing, Bo ; Wang, Jingqi ; Ni, Yan ; Peng, Chong ; Zhu, Xiaowei ; Hong, Wei
Author_Institution :
Dept. of Radio Eng., Southeast Univ., Nanjing
Abstract :
In this paper, a digital linearization platform which consists of digital predistortion (DPD) and Crest factor reduction (CFR) is presented, which is applied to improve the efficiency and linearity of GaAs power amplifier (PA) modules. For a 16W GaAs PA module driven by a two-carrier WCDMA input signal with 12.6dB peak average power ratio (PAPR), the output power is improved from 28.8dBm to 32.8dBm while the adjacent channel leakage ratio (ACLR) is kept as -45dBc@5MHz is achieved after using the digital linearization technology.
Keywords :
adjacent channel interference; code division multiple access; gallium arsenide; linearisation techniques; power amplifiers; Crest factor reduction; WCDMA input signal; adjacent channel leakage ratio; digital linearization technology; digital predistortion; peak average power ratio; power amplifier module; power amplifiers; Baseband; Broadband amplifiers; Gallium arsenide; Linearity; Microwave amplifiers; Millimeter wave technology; Multiaccess communication; Peak to average power ratio; Power amplifiers; Predistortion; Crest factor reduction; Digital linearization; Power amplifier; Predistortion;
Conference_Titel :
Microwave Conference, 2007. APMC 2007. Asia-Pacific
Conference_Location :
Bangkok
Print_ISBN :
978-1-4244-0748-4
Electronic_ISBN :
978-1-4244-0749-1
DOI :
10.1109/APMC.2007.4554695
