TY - GEN
T1 - Frequency offset estimation scheme in the presence of time-varying DC offset and IQ imbalance for OFDM direct conversion receivers
AU - Inamori, Mamiko
AU - Bostamam, Anas M.
AU - Sanada, Yukitoshi
AU - Minami, Hideki
PY - 2007
Y1 - 2007
N2 - In WLAN systems, direct conversion architecture has been implemented. Though this architecture reduces the cost and power consumption, it may suffer from DC offset, frequency offset, and IQ imbalance. This paper presents a frequency offset estimation scheme for OFDM direct conversion receivers. In this paper, a frequency offset estimation scheme in the presence of time-varying DC offset and IQ imbalance is proposed. The novelty of this scheme is in its usage of a differential filter to reduce DC offset. Evaluation of the presented estimation scheme was carried out on an OFDM communication system designed to the specifications of the IEEE 802.11a/g standard for WLANs. Numerical results through computer simulation show that the proposed frequency offset estimation scheme works well even with large DC offset and IQ imbalance.
AB - In WLAN systems, direct conversion architecture has been implemented. Though this architecture reduces the cost and power consumption, it may suffer from DC offset, frequency offset, and IQ imbalance. This paper presents a frequency offset estimation scheme for OFDM direct conversion receivers. In this paper, a frequency offset estimation scheme in the presence of time-varying DC offset and IQ imbalance is proposed. The novelty of this scheme is in its usage of a differential filter to reduce DC offset. Evaluation of the presented estimation scheme was carried out on an OFDM communication system designed to the specifications of the IEEE 802.11a/g standard for WLANs. Numerical results through computer simulation show that the proposed frequency offset estimation scheme works well even with large DC offset and IQ imbalance.
UR - http://www.scopus.com/inward/record.url?scp=44349117933&partnerID=8YFLogxK
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U2 - 10.1109/PIMRC.2007.4394308
DO - 10.1109/PIMRC.2007.4394308
M3 - Conference contribution
AN - SCOPUS:44349117933
SN - 1424411440
SN - 9781424411443
T3 - IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC
BT - 18th Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC'07
T2 - 18th Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC'07
Y2 - 3 September 2007 through 7 September 2007
ER -