Passive and Active Electrical Balance Duplexers
Passive and Active Electrical Balance Duplexers
复制标题
无源和有源电气平衡双工器
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
J. Haine
中科院分区：
文献类型：
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作者：
L. Laughlin;Chunqing Zhang;M. Beach;K. Morris;J. Haine
电平衡双工能够从单个天线同时发送和接收；然而，收发隔离取决于平衡算法确定正确平衡阻抗的能力。提出了一种基于双工自干扰信道原位表征的新型平衡算法。该算法不需要预先了解天线阻抗或混合结特性，并自动补偿电路缺陷。提出了一种利用主动信号注入的新型平衡网络实现方法。实现该均衡算法并结合被动和主动均衡技术的硬件原型在80 mhz带宽上实现了81.5 db的隔离。
Electrical balance duplexing enables simultaneous transmit and receive from a single antenna; however, the transmit-to-receive isolation depends on the ability of the balancing algorithm to determine the correct balancing impedance. A novel balancing algorithm based on in situ characterization of the duplexer self-interference channel is proposed. The algorithm requires no a priori knowledge of the antenna impedance or hybrid junction characteristics and automatically compensates for circuit imperfections. A novel balancing network implementation that uses active signal injection is also proposed. A hardware prototype implementing the proposed balancing algorithm and combining passive and active balancing techniques has achieved 81.5-dB isolation over an 80-MHz bandwidth.