Decision Directed Channel Estimation and High I/Q Imbalance Compensation in OFDM Receivers

Sylvain Traverso (1) , Myriam Ariaudo (1) , Inbar Fijalkow (1) , Jean-Luc Gautier (1) , Christian Lereau (2)

1 ETIS - UMR 8051 - Equipes Traitement de l'Information et Systèmes
2 FT R&D - France Télécom Recherche & Développement

In this letter, the estimation of the IQ imbalance in the presence of a Carrier Frequency Offset (CFO) is addressed. The proposed algorithm has a low complexity, can be used for any Orthogonal Frequency Division Multiplexing (OFDM) system and needs a single pilot symbol. Through numerical simulation and in the context of quick estimations of front-end non-idealities, our algorithm is shown to outperform conventional approaches for sensible values of IQ imbalance and CFO.

Mots clés: I/Q imbalance; OFDM; zero-IF; equalization

Domaines: Traitement du signal et de l'image [eess.SP]; Traitement du signal et de l'image [eess.SP]

Sylvain Traverso, Myriam Ariaudo, Inbar Fijalkow, Jean-Luc Gautier, Christian Lereau. Decision Directed Channel Estimation and High I/Q Imbalance Compensation in OFDM Receivers. IEEE Transactions on Communications, 2009, 57 (5), pp.1246 - 1249. ⟨hal-00532872⟩