Digital Estimation and Compensation of I/Q Imbalance for Full-Duplex Dual-Band OFDM Radio

Zhaowu Zhan 1, * Guillaume Villemaud 1 Florin Hutu 1 Jean-Marie Gorce 1
* Corresponding author
1 SOCRATE - Software and Cognitive radio for telecommunications
Inria Grenoble - Rhône-Alpes, CITI - CITI Centre of Innovation in Telecommunications and Integration of services
Abstract : With the increasing demand of wireless applications, current radio transceivers are challenged by the requirement of high data rate and high flexibility. Full-Duplex Dual-Band OFDM radio transceiver is a very promising radio technique to approach this goal. However, the mutual undesirable signal leakages due to the I/Q imbalance in the Full-Duplex Dual-Band RF front-end lead to a significant performance degradation in the radio link. In this paper, a practical and suitable digital I/Q imbalance estimation and compensation method for mitigating the I/Q imbalance in this flexible radio transceivers is developed and evaluated. The developed I/Q imbalance estimation method is based on the character of the frequency-flat-fading of the self-interference channel. The ADS-Matlab co-simulation results show that the developed digital compensation method can significantly reduce the impact of the I/Q imbalance on the Full-Duplex Dual-Band OFDM radio receivers.
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Zhaowu Zhan, Guillaume Villemaud, Florin Hutu, Jean-Marie Gorce. Digital Estimation and Compensation of I/Q Imbalance for Full-Duplex Dual-Band OFDM Radio. PIMRC 2014, Sep 2014, Washington, United States. ⟨hal-01090698⟩

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