Design and performance of a digital polar transmitter system for multiband-OFDM Ultra-WideBand

Author

Seah, Kwang-Hwee ; Chia, Michael Yan-Wah

Author_Institution

Inst. for Infocomm Res., Agency for Sci., Technol. & Res. (A*STAR), Singapore, Singapore

fYear

2012

fDate

17-20 Sept. 2012

Firstpage

316

Lastpage

319

Abstract

A low-voltage 3-bit Digital Polar Amplifier for MB-OFDM UWB is proposed, which comprises 7 parallel RF amplifiers driven by a constant RF phase-modulated signal and 7 cascode transistors (connected in series) digitally controlled by a 3-bit digitized amplitude signal to reconstruct the UWB signal at the output. Our DPA was able to achieve an EVM of -22 dB and drain efficiency of 21.0% while delivering 5.5 dBm of output power and consuming 17 mW of power using IBM 130-nm CMOS technology.

Keywords

CMOS integrated circuits; OFDM modulation; amplifiers; radio transmitters; ultra wideband communication; 3-bit digitized amplitude signal; 7 cascode transistors; 7 parallel RF amplifiers; DPA; EVM; IBM CMOS technology; MB-OFDM UWB; RF phase-modulated signal; UWB signal; digital polar transmitter system design; digital polar transmitter system performance; low-voltage 3-bit digital polar amplifier; multiband-OFDM ultrawideband; size 130 mum; Bandwidth; CMOS integrated circuits; CMOS technology; Modulation; Radio frequency; Radio transmitters; Ultra wideband technology; Digital polar amplifier; EVM; UWB;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultra-Wideband (ICUWB), 2012 IEEE International Conference on

Conference_Location

Syracuse, NY

ISSN

2162-6588

Print_ISBN

978-1-4577-2031-4

Type

conf

DOI

10.1109/ICUWB.2012.6340504

Filename

6340504