Paper Info
Title
A Low-Complexity Method to Compensate IQ-Imbalance and Phase Noise in MIMO-OFDM Systems
Abstract
The degrading effect of RF impairments on the performance of wireless communication systems is more pronounced in MIMO- OFDM transmission. Two of the most common impairments that significantly limit the performance of MIMO-OFDM transceivers are IQ-imbalance and phase noise. Low-complexity estimation and compensation techniques that can jointly remove the effect of these impairments are highly desirable. In this paper, we propose a simple joint estimation and compensation technique to estimate channel, phase noise and IQ-imbalance parameters in MIMO-OFDM systems under multipath slow fading channels. A subcarrier multiplexed preamble structure to estimate the channel and impairment parameters with minimum overhead is introduced and used in the estimation of IQ-imbalance parameters as well as the initial estimation of effective channel matrix including common phase error (CPE). We then use a novel tracking method based on the second order statistics of the inter-carrier interference (ICI) and noise to update the effective channel matrix throughout an OFDM frame. Simulation results for a variety of scenarios show that the proposed low-complexity estimation and compensation technique can efficiently improve the performance of MIMO-OFDM systems in terms of bit-error-rate (BER).
Year
DOI
Venue
2011
10.1109/GLOCOM.2011.6133834
Global Telecommunications Conference
Keywords
Field
DocType
MIMO communication,OFDM modulation,channel estimation,communication complexity,error statistics,fading channels,intercarrier interference,radio transceivers,radiocommunication,tracking,IQ-imbalance compensation,IQ-imbalance parameter estimation,MIMO-OFDM transceiver,RF impairment,bit-error-rate,channel estimation,channel matrix,common phase error,compensation technique,degrading effect,impairment parameter,intercarrier interference,joint estimation,low-complexity estimation,low-complexity method,multipath slow fading channel,phase noise estimation,second order statistics,subcarrier multiplexed preamble structure,tracking method,wireless communication system
MIMO-OFDM,Subcarrier,Multipath propagation,Telecommunications,Computer science,Fading,Communication channel,Phase noise,MIMO,Real-time computing,Electronic engineering,Orthogonal frequency-division multiplexing
Conference
ISSN
ISBN
Citations 
1930-529X E-ISBN : 978-1-4244-9267-1
978-1-4244-9267-1
4
PageRank 
References 
Authors
0.46
13
3
Name
Order
Citations
PageRank
Shashwat Jnawali140.46
Sajjad Beygi240.46
Hamid-Reza Bahrami3748.75