Citation

Abd. Aziz, Azlan and Amir Hamzah, Nur Asyiqin and Ab. Ghani, Hadhrami and Abd Hamid, Afiq Naufal and Mahmud, Azwan (2022) A Comparative Study of In-phase and Quadrature (IQ) Imbalance Estimation and Compensation Algorithms for OFDM Receivers. In: 2022 International Conference on Engineering & MIS (ICEMIS), 4-6 July 2022, Istanbul, Turkey.

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Abstract

Systems based on orthogonal frequency division multiplexing (OFDM) are subject to limitations caused by the radio front end. These deficiencies are the result of imbalances between the In-phase (I) and Quadrature phase (Q) branches. For zero-IF receiver design which is commonly used in practice, IQ imbalance has been identified as one of the most critical issues. The signal to noise ratio (SNR) at the receiver, data rates and the supported constellation are some key metrices severely impacted by this imbalance. In this paper, the impact of IQ imbalance on OFDM receivers and digital techniques for mitigating the effect of IQ imbalance are explored and studied. We analyse IQ imbalance models and estimation techniques based on a low-complexity feed-forward and a standard-independent IQ imbalance compensation algorithms. The outcome of the constellation method may suggest that the proposed techniques increase performance appropriately.

Item Type:	Conference or Workshop Item (Paper)
Uncontrolled Keywords:	OFDM receiver, IQ imbalance, IQ estimation, training samples
Subjects:	Q Science > QA Mathematics > QA150-272.5 Algebra
Divisions:	Faculty of Engineering and Technology (FET)
Depositing User:	Ms Nurul Iqtiani Ahmad
Date Deposited:	08 Dec 2022 08:22
Last Modified:	08 Dec 2022 08:22
URII:	http://shdl.mmu.edu.my/id/eprint/10795

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