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首页> 外文会议>IEEE International Symposium on Circuits and Systems >Digitally Intensive Mixed-Signal Approach for Self-Interference Cancellation in LTE-A/5G-Transceivers
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Digitally Intensive Mixed-Signal Approach for Self-Interference Cancellation in LTE-A/5G-Transceivers

机译：LTE-A / 5G收发器中自干扰消除的数字强化混合信号方法

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摘要

State-of-the-art radio frequency transceivers for mobile communication devices suffer from transmitter-to-receiver (Tx-Rx) leakage in frequency division duplex operation, which, in combination with further non-idealities in the analog front-end, may lead to diverse self-interference (SI) effects. Digital as well as mixed-signal architectures have been proposed for self-interference cancellation. In this work we present a digitally intensive mixed-signal approach, where a low-cost auxiliary receiver senses the leaked Tx-signal. Firstly, the sensed signal is used to adaptively estimate the leakage channel, whereas in a second step a cleaned version of the leaked Tx-signal is reconstructed digitally. This reconstructed Tx-leakage signal is then used as input for a low complex adaptive interference cancellation unit to suppress modulated spurs or intermodulation distortions. We show that this approach allows to significantly relax the analog auxiliary receiver specifications, while different to conventional all-digital solutions being able to deal with multiple different types of SI with minimal configuration overhead.
机译：用于移动通信设备的最先进的射频收发器遭受频分双工操作中的发射机到接收器（TX-RX）泄漏，其与模拟前端的进一步非理想组合在一起导致不同的自干扰（Si）效应。已经提出了数字以及混合信号架构进行自干扰取消。在这项工作中，我们介绍了一种数字密集的混合信号方法，其中低成本辅助接收器感测泄漏的TX信号。首先，感测信号用于自适应地估计泄漏通道，而在第二步骤中，以数字方式重建泄漏的Tx信号的清洁版本。然后将该重建的TX泄漏信号用作低复杂自适应干扰消除单元的输入，以抑制调制的马刺或互调失真。我们表明这种方法允许显着放松模拟辅助接收器规范，而传统的全数字解决方案能够处理多种不同类型的SI，具有最小的配置开销。

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