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Efficient low-power design and implementation of IQ-imbalance compensator using early termination

Cetin, Ediz and Kale, Izzet and Morling, Richard C.S. (2006) Efficient low-power design and implementation of IQ-imbalance compensator using early termination. In: Proceedings of the 2006 IEEE International Symposium on Circuits and Systems, May 21-24, 2006, Island of Kos, Greece, (ISCAS 2006). IEEE, Los Alamitos, USA, pp. 4995-4998. ISBN 0780393902


Official URL: http://dx.doi.org/10.1109/ISCAS.2006.1693753


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.

Item Type:Book Section
Uncontrolled Keywords:Error compensation, intermediate-frequency amplifiers, quadrature amplitude modulation, receivers, IQ phase error, IQ-imbalance compensator QAM adaptive algorithm, adaptive compensation, blind IQ-compensation gain error, low-power design, quadrature zero-IF receiver, telecommunication channels
Research Community:University of Westminster > Electronics and Computer Science, School of
ID Code:3319
Deposited On:16 Feb 2007
Last Modified:11 Aug 2010 15:31

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