Title :
Effect of efficiency optimization on linearity of LINC amplifiers with CDMA signal
Author :
Jaehyok Yi ; Youngoo Yang ; Bumman Kim
Author_Institution :
Dept. of Electron. & Electr. Eng., Pohang Inst. of Sci. & Technol., South Korea
Abstract :
The linear and efficient power amplification can be achieved with LINC (linear amplification with nonlinear components) amplifiers because RF power amplifiers deal with constant envelope signals in LINC systems. To increase the average efficiency in some modulation schemes with high peak to average ratio, reactance termination in combining circuit is used. However, the shunt reactance termination degrades the linearity performance of LINC. This work shows the effect of efficiency optimization with reactance termination on ACLR (Adjacent Channel Leakage Ratio) of LINC amplifiers with WCDMA modulation systems using envelope simulation.
Keywords :
code division multiple access; power amplifiers; radiofrequency amplifiers; CDMA signal; LINC amplifier; RF power amplifier; WCDMA modulation; adjacent channel leakage ratio; combining circuit; efficiency optimization; envelope simulation; linear amplification; linearity; nonlinear component; peak-to-average ratio; shunt reactance termination; wireless communication system; Degradation; Linearity; Microwave amplifiers; Multiaccess communication; Operational amplifiers; Peak to average power ratio; Power amplifiers; RF signals; Radio frequency; Radiofrequency amplifiers;
Conference_Titel :
Microwave Symposium Digest, 2001 IEEE MTT-S International
Conference_Location :
Phoenix, AZ, USA
Print_ISBN :
0-7803-6538-0
DOI :
10.1109/MWSYM.2001.967148
