Analysis of RF Feedback Chain Isolation in Wireless Co-Time Co-Frequency Full Duplex
Analysis of RF Feedback Chain Isolation in Wireless Co-Time Co-Frequency Full Duplex
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无线同时同频全双工射频反馈链隔离度分析
DOI：
10.11989/jest.1674-862x.71204011
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发表时间：
2018-09
影响因子：
--
通讯作者：
Li Li
中科院分区：
文献类型：
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作者：
Juan Zhou;Ying Shen;Yajuan Xue;Li Li
通过采用射频（RF）反馈链，可以在同时同频全双工（CCFD）中有效地消除自干扰。然而，由于射频反馈链隔离不完善而导致的不可避免的信号串扰通常会损害自干扰消除（SIC）性能。为了解决这个问题，我们首先分析 RF 反馈链隔离对 SIC 性能的影响。然后在多天线CCFD架构中提出了带有RF反馈链的数字预处理方案。通过分析和实验方法，我们发现所提出的方案在 SIC 上取得了更好的性能。
By employing a radio frequency (RF) feedback chain, the self-interference can be canceled efficiently in co-time co-frequency full duplex (CCFD). However, the evitable signal crosstalk which is caused by the imperfect RF feedback chain isolation usually damages the self-interference cancelation (SIC) performance. To deal with this problem, firstly, we analyze the impact of RF feedback chain isolation on SIC performance. Then a digital pre-processing scheme with RF feedback chain is proposed in the multiple-antenna CCFD architecture. Using both analytical and experimental methods, we find that the proposed scheme achieves a better performance on SIC.