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

Cetin, Ediz, 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


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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
Subjects: University of Westminster > Science and Technology > Electronics and Computer Science, School of (No longer in use)
Depositing User: Miss Nina Watts
Date Deposited: 16 Feb 2007
Last Modified: 11 Aug 2010 14:31
URI: http://westminsterresearch.wmin.ac.uk/id/eprint/3319

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