Frequency offset estimation scheme in the presence of time-varying DC offset and IQ imbalance for OFDM direct conversion receivers

被引：0

作者：

Inamori, Mamiko ^{[1
]}

Bostamam, Anas M. ^{[1
]}

Sanada, Yukitoshi ^{[1
,2
]}

Minami, Hideki ^{[3
]}

机构：

[1] Keio Univ, Dept Elect & Elect Engn, Yokohama, Kanagawa 223, Japan

[2] Sony Comp Sci Lab Inc, Tokyo, Japan

[3] Sony Corp, Atsugi, Kanagawa, Japan

来源：

2007 IEEE 18TH INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS, VOLS 1-9 | 2007年

关键词：

D O I：

暂无

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

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.

引用

页码：971 / +

页数：2

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