A digital self-interference cancellation method for practical full-duplex radio
A digital self-interference cancellation method for practical full-duplex radio
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一种实用的全双工无线电数字自干扰消除方法
DOI：
10.1109/icspcc.2014.6986155
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Deyuan Chen
中科院分区：
文献类型：
--
作者：
Di;Can Zhang;Shaoshuai Gao;Deyuan Chen
以往的研究表明，只要充分消除自干扰，就有可能实现全双工系统。数字相消方法是在数字域中消除残留自干扰信号的重要步骤。与现有技术相比，本文提出了一种新的数字对消方法。引入递归最小二乘（RLS）算法，并根据自干扰信道特性自适应调整数字滤波器长度。实时实验结果表明，该方法具有相当理想的性能比以前的研究。在15dBm的高发射功率下，对于5MHz带宽的信号，该电路可以达到约26dB的增益。此外，当被动和主动消除机制不理想时，它仍然有效。
Previous research shows that it is possible to achieve full-duplex system as long as self-interference is cancelled enough. Digital cancellation method is an important step to remove the residue self-interference signal in digital domain. Compared with prior art, this paper purposes a novel digital cancellation method. The recursive least squares (RLS) algorithm is introduced and digital filter length can be adjusted adaptively based on the self-interference channel characteristic. The real-time experimental results show that our method has fairly desirable performance than previous research. It can achieve about 26dB for 5MHz bandwidth signal at high transmit power 15dBm. Furthermore, it is still effective when passive and active cancellation mechanisms are not ideal.