Blind frequency-dependent IQ imbalance compensation scheme using CMA for OFDM system
Blind frequency-dependent IQ imbalance compensation scheme using CMA for OFDM system
复制标题
用于 OFDM 系统的使用 CMA 的盲频率相关 IQ 不平衡补偿方案
DOI：
10.1109/pimrc.2011.6140626
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
M. Mizoguchi
中科院分区：
文献类型：
--
作者：
M. Matsui;T. Nakagawa;R. Kudo;K. Ishihara;M. Mizoguchi
频率相关的IQ不平衡将是未来宽带无线通信系统的性能下降因素之一。针对宽带OFDM收发机中频率选择性IQ不平衡问题，提出了一种盲补偿方案。所提出的方案使用具有通过恒模算法计算的权重的2抽头滤波器，其不需要任何训练或导频信号。我们通过计算机仿真验证了我们提出的方案补偿了OFDM收发器中频率依赖的IQ不平衡。我们还展示了一些实验结果，其中超过6 GHz的频率依赖性IQ不平衡由我们提出的方案进行补偿。
Frequency-dependent IQ imbalance will be one of the degrading factors for future wideband wireless communication systems. This paper presents a blind compensation scheme for the frequency-selective IQ imbalance that occurs in wideband OFDM transceivers. The proposed scheme uses 2-tap filters having weights calculated by a constant modulus algorithm, which does not require any training or pilot signals. We verified by computer simulation that our proposed scheme compensates for frequency-dependent IQ imbalance in OFDM transceivers. We also show some experimental results, in which a frequency-dependent IQ imbalance over 6 GHz is compensated for by our proposed scheme.