Paper Info
Title
Band-selective estimation for IQ-imbalance and carrier frequency offset in OFDM systems
Abstract
In this paper, we propose a high-precision digital framework to compensate for non-ideal effects in the analog front-end circuits for wireless communication systems. The IQ imbalance and the carrier frequency offset (CFO) are jointly estimated with a band-selective mechanism of the orthogonal frequency division multiplexing (OFDM) system. The compensable CFO range is four times wider than prior schemes. The proposed mechanism divides the whole range of CFO bandwidth into three bands: the high-CFO band, the medium-CFO band, and the low-CFO band. The least-square (LS) based method is performed to simultaneously estimate the IQ imbalance and the CFO. Simulation results show that the proposed band-selective algorithm provides accurate estimation, with the average error less than 0.13%.
Year
DOI
Venue
2014
10.1109/ISCAS.2014.6865483
ISCAS
Keywords
Field
DocType
wireless communication systems,iq-imbalance,band selective estimation,least square based method,ofdm modulation,orthogonal frequency division multiplexing,radio networks,least squares approximations,carrier frequency offset,analog front end circuits,ofdm systems,ls based method,band selective mechanism,high-precision digital framework,cfo,bit error rate,ofdm,estimation
Wireless communication systems,IQ imbalance,Control theory,Computer science,Carrier frequency offset,Electronic engineering,Bandwidth (signal processing),Electronic circuit,Orthogonal frequency-division multiplexing
Conference
ISSN
Citations 
PageRank 
0271-4302
1
0.35
References 
Authors
6
3
Name
Order
Citations
PageRank
Chih-Hung Kuo18614.77
Ping Ma210.69
Chi-Fang Chang310.35