Title :
SDR transmitter based on LINC amplifier with bias control
Author :
Young Yun Woo ; Jaehyok Yi ; Youngoo Yang ; Bumman Kim
Author_Institution :
Dept. of Electron. & Electr. Eng., Pohang Univ. of Sci. & Technol., Kyungbuk, South Korea
Abstract :
This paper describes a LINC (Linear Amplification using Nonlinear Components) handset transmitter adopting DC bias control. The power amplifier is operated at a saturated output power level and its level is adjusted by DC bias control. Thus the transmitter guarantees high efficiency at all usable output power level. Due to the LINC linearization, it can operate as a linear power amplifier. The new LINC transmitter can be used as a transmitter for software defined radio (SDR), since it can efficiently amplify both the GSM type constant envelope signal and CDMA type non-constant envelope signal, and its control part is very simple and mostly embodied in the digital domain. For verification, a 1.71 GHz LINC prototype transmitter has been implemented and tested. The results, compared with conventional cases, clearly show the suitability of the new LINC transmitter for SDR application.
Keywords :
UHF power amplifiers; cellular radio; code division multiple access; linearisation techniques; radio transmitters; software radio; 1.71 GHz; CDMA type mobile radio transmitters; CDMA type nonconstant envelope signal; DC bias control; GSM type constant envelope signal; LINC amplifier; LINC linearization; SDR transmitter; handset transmitter; high efficiency transmitter; linear amplification using nonlinear components; linear power amplifier; power amplifier; saturated output power level; software defined radio; GSM; Multiaccess communication; Power amplifiers; Power generation; Prototypes; Radio control; Radio transmitters; Software prototyping; Software radio; Telephone sets;
Conference_Titel :
Microwave Symposium Digest, 2003 IEEE MTT-S International
Conference_Location :
Philadelphia, PA, USA
Print_ISBN :
0-7803-7695-1
DOI :
10.1109/MWSYM.2003.1210467
