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A Novel IQ Imbalance Compensation Method with Pilot-Signals for OFDM System
Yoshimasa EGASHIRA
Yasuhiko TANABE
Kazumi SATO
Publication
B - Abstracts of IEICE TRANSACTIONS on Communications (Japanese Edition) Vol.J91-B No.5 pp.558-565
Publication Date: 2008/05/01
Online ISSN: 1881-0209
Print ISSN: 1344-4697
Type of Manuscript: PAPER
Category:
Keyword:
OFDM,
quadrature demodulation,
IQ imbalance,
pilot-signals,
Full Text(in Japanese): PDF(542.7KB)
Summary:
Orthogonal Frequency Division Multiplex (OFDM) using a high-order modulation suffers from effects of In-phase and Quadrature-phase (IQ) imbalance in a quadrature demodulator. In this paper, we propose a novel IQ imbalance compensation method for OFDM systems. The proposed method estimates the IQ imbalance parameters using pilot signals inserted in frequency domain and then compensates the IQ imbalance effects based on the estimated parameter. The proposed method can be applied regardless of frequency-spacings of pilot signals and can compensate the IQ imbalance effect correctly.
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