Joint transmitter and receiver IQ imbalance estimation and compensation for OFDM systems

Author

Lu, I-Tai ; Chang, Jiang

Author_Institution

Dept. of ECE, New York Univ., Brooklyn, NY, USA

fYear

2010

fDate

10-14 Jan. 2010

Firstpage

476

Lastpage

479

Abstract

In the presence of both transmitter (TX) and receiver (RX) IQ imbalances, the TX/RX IQ imbalances and channel fading are coupled together. Therefore, one needs to solve a set of highly nonlinear equations for estimating the TX/RX IQ imbalance parameters and channel transfer functions at subcarriers in OFDM systems. In this paper, a novel joint TX/RX IQ imbalance estimation and compensation scheme is proposed. By taking advantage of the frequency-selective channel fading, the TX/RX IQ imbalance parameters and channel transfer functions can be decoupled and estimated sequentially. Simulation results demonstrate that the proposed scheme can effectively estimate and compensate the TX/RX IQ imbalances in OFDM systems.

Keywords

OFDM modulation; fading channels; nonlinear equations; parameter estimation; transceivers; transfer functions; OFDM system compensation; channel transfer functions; frequency-selective channel fading; joint TX-RX IQ imbalance parameter estimation; joint transmitter IQ imbalance estimation; nonlinear equations; receiver IQ imbalance estimation; Adaptive filters; Channel estimation; Fading; Frequency estimation; Nonlinear equations; OFDM; Signal processing algorithms; Transceivers; Transfer functions; Transmitters; IQ imbalance; OFDM;

fLanguage

English

Publisher

ieee

Conference_Titel

Radio and Wireless Symposium (RWS), 2010 IEEE

Conference_Location

New Orleans, LA

Print_ISBN

978-1-4244-4725-1

Electronic_ISBN

978-1-4244-4726-8

Type

conf

DOI

10.1109/RWS.2010.5434165

Filename

5434165