Low‐complexity subspace method for I/Q imbalance estimation in low‐IF receivers with unknown fading,Transactions on Emerging Telecommunications Technologies

当前位置： X-MOL 学术 › Trans. Emerg. Telecommun. Technol. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Low‐complexity subspace method for I/Q imbalance estimation in low‐IF receivers with unknown fading
Transactions on Emerging Telecommunications Technologies ( IF 2.5 ) Pub Date : 2020-12-16 , DOI: 10.1002/ett.4181
Ahmad Gomaa ₁ , Ayman Elezabi ₂ , Mohamed H. Eissa _{2,

3}

Affiliation

In low‐intermediate‐frequency (low‐IF) receivers, I/Q imbalance (IQI) causes interference on the desired signal from the blocker signal transmitted over the image frequencies. Conventional approaches for pilot‐aided IQI estimation in zero‐IF receivers are not applicable to low‐IF receivers, where the image interference is unknown at the receiver. We propose a low‐complexity subspace method for the estimation of IQI parameters in low‐IF receivers in the presence of unknown fading, where we utilize knowledge of the pilots to null out the signal part. This reduces the variance of the sample mean estimate and leads to faster convergence. The proposed nulling method offers significantly better image rejection at low input signal‐to‐interference power ratio (SIR) than existing methods. Performance analysis of the output SIR as well as computer simulations are also provided.

中文翻译：

低复杂度子空间方法，用于未知衰落的低中频接收机中的I / Q不平衡估计

在低中频（low-IF）接收器中，I / Q不平衡（IQI）会导致通过镜像频率传输的阻塞信号对所需信号产生干扰。零中频接收机中用于导频辅助IQI估计的传统方法不适用于低中频接收机，因为在这种情况下，接收机的图像干扰是未知的。我们提出了一种低复杂度子空间方法，用于在存在未知衰落的情况下估计低中频接收机中的IQI参数，其中我们利用导频知识使信号部分无效。这减少了样本均值估计的方差，并导致更快的收敛。与现有方法相比，所提出的调零方法在低输入信号干扰功率比（SIR）下提供了更好的图像抑制性能。

更新日期：2020-12-16

点击分享查看原文

点击收藏

公开下载

阅读更多本刊最新论文本刊介绍/投稿指南11