Title :
A linearized transmitter based on digital baseband predistortion for BTS
Author :
Wang, Jingqi ; Jiang, Wei ; Peng, Chong ; Yu, Xian ; Xin, Bo ; Ni, Yan ; Zhu, Xiaowei
Author_Institution :
State Key Lab. of Millimeter Wave, Southeast Univ., Nanjing, China
Abstract :
In this paper, the digital baseband predistortion is presented to linearize transmitter performance in BTS, in which the digital IF architecture is implemented. The simulation of CDMA2000 IX modulated signal based on ADS was performed to investigate the effect of digital predistortion. Finally, the measurement results show the excellent performance of this transmitter, such as the RMS EVM is 3.59%, PK EVM is 8.50%, and the ACP improvement is 12dB for CDMA2000 signal or 10dB for WCDMA signal. Therefore, it might be a promising candidate for future wireless communication systems.
Keywords :
code division multiple access; linearisation techniques; mobile communication; modulation; nonlinear distortion; radio transmitters; CDMA2000 signal modulation; WCDMA signals; digital IF architecture; digital baseband predistortion; linearized transmitter; wireless communication; Antenna measurements; Base stations; Baseband; Costs; High power amplifiers; Predistortion; Quadrature phase shift keying; Radio transmitters; Table lookup; Wireless communication;
Conference_Titel :
Microwave Conference Proceedings, 2005. APMC 2005. Asia-Pacific Conference Proceedings
Print_ISBN :
0-7803-9433-X
DOI :
10.1109/APMC.2005.1607074
