Paper Info
Title
Effective I/Q Imbalance Estimation Algorithm for MB-OFDM-Based UWB Systems in the Presence of Carrier Frequency Offset
Abstract
This paper proposes a new I/Q imbalance estimation algorithm for multiband orthogonal frequency division multiplexing (MB-OFDM) based ultra-wideband (UWB) systems. The proposed algorithm is highly effective for the UWB channels with strong frequency selectivity in the presence of carrier frequency offset (CFO). In order to estimate I/Q imbalance, the 2nd-order moments of received signal are analyzed, and a metric function is derived considering CFO. The I/Q imbalance is estimated based on this function which can be sequentially calculated with only two preamble symbols per each sub-band in timedomain, which ensures immediate convergence and robustness to frequency selectivity. The performance of the algorithm is evaluated by simulations in the case of 480 Mbps transmission mode in WiMedia MB-OFDM system. The simulation results show that the proposed algorithm achieves about 4 dB SNR improvement over the existing methods at BER=10-5 .
Year
DOI
Venue
2009
10.1109/VETECF.2009.5378818
Vehicular Technology Conference Fall
Keywords
Field
DocType
ofdm modulation,ultra wideband communication,i/q imbalance estimation algorithm,mb-ofdm,uwb systems,wimedia,carrier frequency offset,metric function,multiband orthogonal frequency division multiplexing,data mining,estimation,ultra wideband,ofdm,signal to noise ratio,bit error rate
Convergence (routing),Frequency divider,Computer science,Signal-to-noise ratio,Carrier frequency offset,Metric (mathematics),Algorithm,Robustness (computer science),Electronic engineering,Orthogonal frequency-division multiplexing,Bit error rate
Conference
ISSN
ISBN
Citations 
1090-3038 E-ISBN : 978-1-4244-2515-0
978-1-4244-2515-0
0
PageRank 
References 
Authors
0.34
9
4
Name
Order
Citations
PageRank
Kilhwan Kim1266.06
Yunho Jung213624.95
Jiho Kim35715.00
Jeaseok Kim400.34