NDLI: Joint Tx and Rx IQ Imbalance Compensation of OFDM Transceiver in Mesh Network

Content Provider	IEEE Xplore Digital Library
Author	Chia-Horng Liu
Copyright Year	2008
Description	Author affiliation: Telecommun. Labs., Chunghwa Telecom Co., Ltd. (Chia-Horng Liu)
Abstract	The direct conversion is an attractive architecture, as compared to the traditional heterodyne approach, for both transmitter and receiver design. In spite of its great advantages in hardware implementation, direct conversion results in several negative effects, such as IQ imbalance, flicker noise, DC offset, etc. In this paper, we study the IQ imbalance problems occur at both transmitter and receiver in an OFDM-based mesh network. The contributions of this paper are three-fold. First, we propose a self-calibration scheme at transmitter. Therefore, the IQ imbalance at transmitter is compensated before communication. Second, we design a standard-independent IQ imbalance estimation scheme at receiver. Finally, three different equalization schemes for IQ-mismatched receiver are studied. It is shown from our simulation results that the proposed schemes are feasible for solving Tx-Rx IQ imbalance problems in OFDM systems.
Starting Page	1
Ending Page	5
File Size	226421
Page Count	5
File Format	PDF
ISBN	9781424423248
ISSN	1930529X
DOI	10.1109/GLOCOM.2008.ECP.141
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-11-30
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Transceivers Mesh networks Fading Radio transmitters Hardware 1f noise OFDM modulation Degradation RF signals Telecommunications
Content Type	Text
Resource Type	Article

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