Title :
LINC transmitter with double threshold SCS
Author :
He, Songbai ; Li, Hongbao ; You, Fei
Author_Institution :
Sch. of Electron. Eng., Univ. of Electron. Sci. & Technol. of China, Chengdu
Abstract :
The paper presented a new signal component separate (SCS) algorithm named Double Threshold SCS(DTSCS). It can improve the efficiency of Chireix-outphasing combiner in Linear amplification using nonlinear components (LINC) system. Two thresholds are used to decompose the input signal into two signals with much lower peak-to-average ratio. This method can improve the efficiency of Chireix-outphasing combiners without deteriorating the linearity. The result is validated by decomposing a WCDMA downlink signal with 8 dB peak-to average ratio. Co-simulation in ADS and MATLAB for a complete LINC system is done to support this new algorithm. The simulation results show that the efficiency is improved from 16% to 38% while the linearity is retained the same level as which using the general SCS algorithm.
Keywords :
broadband networks; code division multiple access; source separation; transmitters; ADS; Chireix-outphasing combiner; LINC transmitter; MATLAB; WCDMA downlink signal; double threshold signal component separate; linear amplification; nonlinear components system; signal component separate algorithm; Circuits; Impedance; Linearity; Multiaccess communication; Phase modulation; Power transmission lines; Predistortion; Radiofrequency amplifiers; Transmission line theory; Transmitters; Linear amplification using nonlinear compo-nents (LINC); RF power amplifier; WCDMA; transmitter;
Conference_Titel :
Radio and Wireless Symposium, 2009. RWS '09. IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
978-1-4244-2698-0
Electronic_ISBN :
978-1-4244-2699-7
DOI :
10.1109/RWS.2009.4957367
