Compensation of Phase Noise and IQ Imbalance in Multi-Carrier Systems

被引：4
|
作者：
Le, Long D. [1 ]
Nguyen, Ha H. [1 ]
机构：
[1] Univ Saskatchewan, Dept Elect & Comp Engn, Saskatoon, SK S7N 5A9, Canada
来源：
IEEE ACCESS | 2020年 / 8卷
关键词：
Multi-carrier systems; OFDM; CFBMC-OQAM; GFDM; phase noise; IQ~imbalance; channel estimation; cyclic prefix; CHANNEL ESTIMATION; I/Q IMBALANCE;
D O I：
10.1109/ACCESS.2020.3032555
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
Compensation for the impacts of phase noise (PN) and in-phase and quadrature (IQ) imbalance on cyclic-prefix (CP) based multi-carrier modulation systems in the presence of imperfect channel estimation is considered in this paper. A unified two-stage algorithm is proposed. In the first stage, IQ imbalance parameters and channel impulse response are estimated based on the transmission of a preamble which is designed in such a way that the estimation of IQ imbalance does not require any knowledge about the channel and PN. Given the estimates from the first stage, the impacts of IQ imbalance and PN are subsequently compensated in the second stage based on the transmission of pilot symbols. The proposed algorithm is further extended to a MIMO system that employs a diversity technique. Simulation results are presented for a wide range of PN and IQ imbalance scenarios to corroborate the effectiveness of the proposed algorithm.
引用
收藏
页码：191263 / 191277
页数：15
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