Asymmetric multilevel outphasing architecture for multi-standard transmitters
Author(s)
Chung, SungWon; Godoy, Philip Andrew; Barton, Taylor W.; Huang, Everest W.; Perreault, David J.; Dawson, Joel L.; ... Show more Show less
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We describe a new outphasing transmitter architecture in which the supply voltage for each PA can switch among multiple levels. It is based on a new asymmetric multilevel outphasing (AMO) modulation technique which increases overall efficiency over a much wider output power range than the standard LINC system while maintaining high linearity. For demonstration, the overall transmitter is simulated in a 65 nm CMOS process with HSUPA and WLAN signals. The simulation results show an efficiency improvement from 17.7% to 40.7% for HSUPA at 25.3 dBm output power and from 11.3% to 35.5% for WLAN 802.11g at 22.8 dBm while still meeting system linearity requirements.
Date issued
2009-06Department
Lincoln Laboratory; Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science; Massachusetts Institute of Technology. Microsystems Technology LaboratoriesJournal
IEEE Radio Frequency Integrated Circuits Symposium, 2009. RFIC 2009.
Publisher
Institute of Electrical and Electronics Engineers
Citation
SungWon Chung et al. “Asymmetric multilevel outphasing architecture for multi-standard transmitters.” Radio Frequency Integrated Circuits Symposium, 2009. RFIC 2009. IEEE. 2009. 237-240. © 2009 Institute of Electrical and Electronics Engineers.
Version: Final published version
ISBN
978-1-4244-3378-0
978-1-4244-3376-6
Keywords
wideband phase modulator, Outphasing, Digital predistortion, LINC