Exploiting the diversity gain of transmitter I/Q imbalance in single-antenna OFDM systems

Authors:
Edward K. S. Au;Zhongding Lei;Francois P. S. Chin
Affiliations:
Media and Communications Lab., Corporate Research Dept., Huawei Technologies, China;Modulation and Coding Dept., Institute for Infocomm Research, Singapore;Modulation and Coding Dept., Institute for Infocomm Research, Singapore
Venue:
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Year:
2009

Citing 6
Cited 0

Compensation schemes and performance analysis of IQ imbalances in OFDM receivers

IEEE Transactions on Signal Processing - Part II
Advanced methods for I/Q imbalance compensation in communicationreceivers

IEEE Transactions on Signal Processing
Joint Adaptive Compensation of Transmitter and Receiver IQ Imbalance Under Carrier Frequency Offset in OFDM-Based Systems

IEEE Transactions on Signal Processing
Optimal minimum distance-based precoder for MIMO spatial multiplexing systems

IEEE Transactions on Signal Processing
Multihead detection for multitrack recording channels

IEEE Transactions on Information Theory
Impacts of I/Q imbalance on QPSK-OFDM-QAM detection

IEEE Transactions on Consumer Electronics

Quantified Score

Hi-index	0.00

Visualization

Abstract

Zero-IF architecture is a competitive alternative to the conventional super-heterodyne architecture for RF-to-baseband conversion in OFDM systems. Despite its advantages of low cost and high integratability, it suffers from the I/Q imbalance that contributes amplitude and phase mismatches between in-phase and quadrature branches, resulting in signal distortion and performance degradation. In this paper, we revisit the problem in a theoretical viewpoint through a minimum distance analysis. In particular, we aim at proving that when the subcarriers are paired symmetrically to a center frequency and the maximum likelihood decoding is employed, the transmitter I/Q imbalance can provide an additional degree of diversity in frequency selective fading channels.