TY - GEN
T1 - Effective I/Q imbalance estimation algorithm for MB-OFDM-based UWB systems in the presence of carrier frequency offset
AU - Kim, Kilhwan
AU - Jung, Yunho
AU - Kim, Jiho
AU - Kim, Jeaseok
PY - 2009
Y1 - 2009
N2 - 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 time-domain, 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.
AB - 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 time-domain, 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.
UR - http://www.scopus.com/inward/record.url?scp=77951489862&partnerID=8YFLogxK
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U2 - 10.1109/VETECF.2009.5378818
DO - 10.1109/VETECF.2009.5378818
M3 - Conference contribution
AN - SCOPUS:77951489862
SN - 9781424425150
T3 - IEEE Vehicular Technology Conference
BT - Proceedings of the 2009 IEEE 70th Vehicular Technology Conference Fall, VTC 2009 Fall
T2 - 2009 IEEE 70th Vehicular Technology Conference Fall, VTC 2009 Fall
Y2 - 20 September 2009 through 23 September 2009
ER -