Blind estimation of carrier frequency offset, I/Q imbalance and DC offset for OFDM systems

Blind estimation of carrier frequency offset, I/Q imbalance and DC offset for OFDM systems
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OFDM 系统的载波频率偏移、I/Q 不平衡和 DC 偏移的盲估计

DOI:
10.1186/1687-6180-2012-105
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发表时间:
2012-05
影响因子:
1.9
通讯作者:
Li, Hanzhang
Li, Hanzhang
中科院分区:
工程技术4区
文献类型:
--
作者:
Liu, Tao;Li, Hanzhang

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相似文献

正交频分复用(OFDM)系统对载波频偏(CFO)的敏感性是其最大的缺点之一。为了补偿OFDM系统中的频偏,人们研究了许多频偏估计算法。然而,由于采用直接变频结构(DCA),在OFDM系统中引入了直流偏移(DCO)和同相/正交(I/Q)不平衡等额外的损伤,使得已有的CFO估计算法性能下降。在我们先前的研究中,我们提出了一个盲的CFO,I/Q不平衡和DCO估计算法的OFDM系统与DCA。在这篇文章中,我们提出了一种替代算法,降低了计算复杂度和更好的精度。仿真结果证明了该算法的有效性。
Sensitivity to carrier frequency offset (CFO) is one of the biggest drawbacks of orthogonal frequency division multiplexing (OFDM) system. A lot of CFO estimation algorithms had been studied for compensation of CFO in OFDM system. However, with the adoption of direct-conversion architecture (DCA), which introduces additional impairments such as dc offset (DCO) and in-phase/quadrature (I/Q) imbalance in OFDM system, the established CFO estimation algorithms suffer from performance degradation. In our previous study, we developed a blind CFO, I/Q imbalance and DCO estimation algorithm for OFDM systems with DCA. In this article, we propose an alternative algorithm with reduced computation complexity and better accuracy. Performance of the proposed algorithm is demonstrated by simulations.
具有 I/Q 不平衡的 OFDM 系统中的载波频偏盲估计
DOI: 10.1016/j.sigpro.2009.04.026
发表时间: 2009-11
期刊: Signal Processing
影响因子: 4.4
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