Frame synchronization and joint estimation of IQ imbalance and channel response for OFDM systems

被引：4
|
作者：
Cho, W-J [1 ]
Chang, T-K [1 ]
Chung, Y-H. [1 ]
Phoong, S. -M. [1 ]
Lin, Y-P [2 ]
机构：
[1] Natl Taiwan Univ, Dept EE, Grad Inst Comm Engn, Taipei, Taiwan
[2] Natl Chiao Tung Univ, Dept Elect & Contr Engn, Hsinchu 30050, Taiwan
来源：
2008 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH AND SIGNAL PROCESSING, VOLS 1-12 | 2008年
关键词：
frame synchronization; IQ imbalance; channel estimation;
D O I：
10.1109/ICASSP.2008.4518288
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
In this paper, we first introduce a new method for joint estimation of IQ imbalance and channel response in OFDM systems under the assumption of perfect frame synchronization. The proposed method needs only one OFDM block for training and the solution is given in closed form. Then the method is applied to the scenario when the OFDM frame is not synchronized. A reduced complexity algorithm is derived. With a relatively low complexity, the proposed method can accurately estimate the frame starting position, the IQ imbalance and the channel response simultaneously. Simulation results show that the bit error rate (BER) performance of the proposed method is very close to the ideal case when all these parameters are known perfectly at the receiver.
引用
收藏
页码：3029 / +
页数：3
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