Title :
Efficient low-power design and implementation of IQ-imbalance compensator using early termination
Author :
Cetin, Ediz ; Kale, Izzet ; Morling, Richard C S
Author_Institution :
Dept. of Electron. Syst., Westminster Univ., London
Abstract :
In this paper, we propose a low-complexity architecture for the implementation of adaptive IQ-imbalance compensation in quadrature zero-IF receivers. Our blind IQ-compensation scheme jointly compensates for IQ phase and gain errors without the need for test/pilot tones. The proposed architecture employs early-termination of the iteration process; this enables the powering-down of the parts of the adaptive algorithm thereby saving power. The complexity, in terms of power-down efficiency is evaluated and shows a reduction by 37-50 % for 32-PSK and 37-58 % for 64-QAM modulated signals
Keywords :
error compensation; intermediate-frequency amplifiers; quadrature amplitude modulation; receivers; telecommunication channels; IQ phase error; IQ-imbalance compensator; QAM; adaptive algorithm; adaptive compensation; blind IQ-compensation; gain error; low-power design; quadrature zero-IF receiver; Adaptive algorithm; Analytical models; Degradation; Digital signal processing; Energy consumption; Performance analysis; Radio frequency; Signal generators; Testing; Very large scale integration;
Conference_Titel :
Circuits and Systems, 2006. ISCAS 2006. Proceedings. 2006 IEEE International Symposium on
Conference_Location :
Island of Kos
Print_ISBN :
0-7803-9389-9
DOI :
10.1109/ISCAS.2006.1693753