Title :
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
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;
Conference_Titel :
Ultra-Wideband (ICUWB), 2012 IEEE International Conference on
Conference_Location :
Syracuse, NY
Print_ISBN :
978-1-4577-2031-4
DOI :
10.1109/ICUWB.2012.6340504
