Title :
Analysis and characterization of mismatches in outphasing transmitter
Author :
Kulkarni, Santosh ; Dixian Zhao ; Reynaert, Patrick
Author_Institution :
ESAT-MICAS, Katholieke Univ. Leuven, Leuven, Belgium
Abstract :
The effect of imbalances in the quadrature modulators and the two RF paths of an outphasing transmitter are studied in this paper. A matlab model describing all the mismatches is used to investigate the effects on error vector magnitude (EVM) and adjacent channel interference. A test vector based method is used to measure and therefore compensate mismatch. This is applied in a 60 GHz outphasing transmitter in 40nm CMOS and measured mismatch is minimized further by using the compensation scheme. This resulted in improvement in output power and efficiency.
Keywords :
quadrature amplitude modulation; transmitters; Matlab model; adjacent channel interference; characterization; compensate mismatch; error vector magnitude; frequency 60 GHz; mismatches; outphasing transmitter; output power; quadrature modulators; test vector based method; CMOS integrated circuits; Degradation; Linearity; Mathematical model; Power generation; Transmitters; Vectors;
Conference_Titel :
Electronics, Circuits and Systems (ICECS), 2012 19th IEEE International Conference on
Conference_Location :
Seville
Print_ISBN :
978-1-4673-1261-5
Electronic_ISBN :
978-1-4673-1259-2
DOI :
10.1109/ICECS.2012.6463773
