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

fYear

2009

fDate

18-22 Jan. 2009

Firstpage

401

Lastpage

404

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/RWS.2009.4957367

Filename

4957367