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首页> 外文会议>IEEE International symposium on Personal, Indoor, and Mobile Radio Communications >Blind frequency synchronization for OFDM system with I/Q imbalance
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Blind frequency synchronization for OFDM system with I/Q imbalance

机译：具有I / Q不平衡的OFDM系统的盲频同步

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摘要

In this paper, we propose a new blind frequency synchronization scheme for an OFDM system with I/Q imbalance. A blind estimation of joint CFO and I/Q imbalance parameters is first developed by exploiting the multi-antenna redundancy at the receiver. The estimation computational complexity is reduced by expressing the cost function as a superposition of very few harmonically related cosine waves. The compensation for CFO and I/Q imbalance can be further carried out, which would result in an equivalent received signal model without CFO and I/Q imbalance distortion. Then the conventional channel estimation and data detection can be performed. The Cramer-Rao bound (CRB) of the CFO estimation is derived. We also provide numerical simulations to demonstrate the superiority of the proposed method over the existing competitors.
机译：在本文中，我们针对具有I / Q不平衡的OFDM系统提出了一种新的盲频同步方案。首先通过利用接收器处的多天线冗余来对联合CFO和I / Q不平衡参数进行盲估计。通过将成本函数表示为极少的谐波相关余弦波的叠加，可以降低估计的计算复杂性。可以进一步进行CFO和I / Q不平衡的补偿，这将导致等效的接收信号模型而没有CFO和I / Q不平衡失真。然后可以执行常规的信道估计和数据检测。得出CFO估计的Cramer-Rao界（CRB）。我们还提供了数值模拟，以证明所提出的方法优于现有竞争对手的优越性。

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