Design of highly-efficient wideband RF polar transmitters using Envelope-Tracking (ET) for mobile WiMAX/Wibro applications

Author

Lie, Donald Y C ; Li, Yan ; Lopez, Jerry ; Wu, Stanley ; Yang, Tzu-Yin

Author_Institution

Dept. of Electr. & Comput. Eng., Texas Tech Univ., Lubbock, TX, USA

fYear

2009

fDate

20-23 Oct. 2009

Firstpage

347

Lastpage

350

Abstract

This paper discusses both circuits and system design aspects of highly-efficient wideband RF polar transmitters for mobile WiMAX/Wibro applications using an open-loop envelope tracking (ET) technique. The design of linear-assisted switching envelope amplifier and monolithic SiGe class-E power amplifier (PA) is discussed, while the SPICE simulation results are compared with the measurement data. WiMAX/Wibro circuit and system co-design that include RF circuits and digital DSP blocks co-simulations suggest that the entire highly integrated ET-based transmit (TX) system can meet the stringent 802.16e mobile-WiMAX TX mask with 64-QAM modulation and reach ~33% peak system efficiency.

Keywords

Ge-Si alloys; WiMax; mobile radio; power amplifiers; radio tracking; radio transmitters; semiconductor materials; 64-QAM modulation; 802.16e mobile-WiMAX TX mask; RF circuits; SPICE simulation; SiGe; WiMAX-Wibro circuit; digital DSP blocks cosimulations; highly-efficient wideband RF polar transmitter design; integrated ET-based transmit system; linear-assisted switching envelope amplifier; mobile WiMAX-Wibro applications; monolithic class-E power amplifier; open-loop envelope tracking technique; system codesign; Broadband amplifiers; Circuits and systems; Germanium silicon alloys; Power amplifiers; Radio frequency; Radiofrequency amplifiers; Silicon germanium; Transmitters; WiMAX; Wideband; Envelope-Elimination-and-Restoration (EER); Polar Transmitter; Power Amplifier (PA); SiGe; mobile WiMAX Envelope-Tracking (ET);

fLanguage

English

Publisher

ieee

Conference_Titel

ASIC, 2009. ASICON '09. IEEE 8th International Conference on

Conference_Location

Changsha, Hunan

Print_ISBN

978-1-4244-3868-6

Electronic_ISBN

978-1-4244-3870-9

Type

conf

DOI

10.1109/ASICON.2009.5351425

Filename

5351425