Title :
Highly efficient and linear level shifting digital LINC transmitter with a phase offset cancellation
Author :
Hur, Joonhoi ; Kim, Kwan-Woo ; Lee, Ockgoo ; Cho, Chang-Hyuk ; Lim, Kyutae ; Laskar, Joy
Author_Institution :
Georgia Inst. of Technol., Atlanta, GA
Abstract :
In this paper, a novel level shifting digital linear amplifier with nonlinear components (LINC) transmitter for OFDM system is presented. By using a multi-level switched power supply, the final power added efficiency is significantly improved compared to a conventional LINC amplifier. Moreover, with digital phase offset cancellation scheme, the transmitter has a good linearity as well. This work was verified by ADS simulation with standard 0.18 mum CMOS technology.
Keywords :
OFDM modulation; amplifiers; radio transmitters; switched mode power supplies; ADS simulation; CMOS technology; OFDM system; digital phase offset cancellation scheme; level shifting digital linear amplifier transmitter; linear level shifting digital LINC transmitter; multi-level switched power supply; nonlinear components transmitter; CMOS technology; High power amplifiers; Linearity; OFDM; Peak to average power ratio; Power amplifiers; Power supplies; Regulators; Signal processing; Transmitters; Digital phase modulator (DPM); Dynamic-power-supply; LINC; OFDM; Out-phase;
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.2009.4957323
