A 700–950 MHz Tunable Frequency Division Duplex Transceiver Combining Passive and Active Self-interference Cancellation
A 700–950 MHz Tunable Frequency Division Duplex Transceiver Combining Passive and Active Self-interference Cancellation
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结合无源和有源自干扰消除的 700–950 MHz 可调谐频分双工收发器
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
Muhammad Kalimuddin Khan
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;Muhammad Kalimuddin Khan
本文提出了一种新的可调谐FDD收发器架构，该架构使用电平衡滤波器（EBD）来隔离Rx频带中的Tx噪声，并将其与有源自干扰消除相结合来抑制Tx阻塞。这克服了EBD有限的隔离带宽，将复杂性从RF域转移到数字基带域，以便在两个频带中提供隔离。一个分立的硬件原型已经显示出有希望的结果，并证明了这种架构的可行性，实现6.0-7.4 dB的天线参考噪声系数在20 MHz的下行链路带宽，在+27 dBm的Tx阻塞，在700-950 MHz范围内的双工配置的范围。
This paper presents a novel tunable FDD transceiver architecture which uses an electrical balance duplexer (EBD) to isolate Tx noise in the Rx band, and combines this with active self-interference cancellation to suppress the Tx blocker. This overcomes the limited isolation bandwidth of EBDs, shifting complexity from the RF domain to the digital baseband domain in order to provide isolation in both bands. A discrete hardware prototype has shown promising results and demonstrated the viability of this architecture, achieving 6.0-7.4 dB antenna referred noise figure in a 20 MHz downlink bandwidth, in the presence of a +27 dBm Tx blocker, across a range of duplex configurations in the 700–950 MHz range.