TY - GEN
T1 - Band-selective estimation for IQ-imbalance and carrier frequency offset in OFDM systems
AU - Kuo, Chih Hung
AU - Ma, Ping
AU - Chang, Chi Fang
PY - 2014
Y1 - 2014
N2 - 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%.
AB - 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%.
UR - http://www.scopus.com/inward/record.url?scp=84907409979&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84907409979&partnerID=8YFLogxK
U2 - 10.1109/ISCAS.2014.6865483
DO - 10.1109/ISCAS.2014.6865483
M3 - Conference contribution
AN - SCOPUS:84907409979
SN - 9781479934324
T3 - Proceedings - IEEE International Symposium on Circuits and Systems
SP - 1708
EP - 1711
BT - 2014 IEEE International Symposium on Circuits and Systems, ISCAS 2014
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2014 IEEE International Symposium on Circuits and Systems, ISCAS 2014
Y2 - 1 June 2014 through 5 June 2014
ER -