18.1 A 1.7-to-2.2GHz full-duplex transceiver system with >50dB self-interference cancellation over 42MHz bandwidth
18.1 A 1.7-to-2.2GHz full-duplex transceiver system with >50dB self-interference cancellation over 42MHz bandwidth
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18.1 1.7 至 2.2GHz 全双工收发器系统，在 42MHz 带宽上具有 >50dB 自干扰消除能力
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
J. Rudell
中科院分区：
文献类型：
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作者：
Tong Zhang;A. Najafi;Chenxin Su;J. Rudell
全双工（FD）无线电通信可能使密集占用的RF频谱（100MHz至5GHz）的频谱效率翻倍。然而，重大的挑战仍然存在，特别是存在强大的发射器（TX）自干扰（SI）耦合到接收器（RX）。最近许多减轻SI的努力都集中在使用主动抵消技术[1-5]。然而，这些方法面临着噪声性能下降、高功耗[1,4]、硅面积大、无法充分抵消高输出功率TX信号[3 - 4]或实现相对较窄的抵消带宽[3,5]等挑战。此外，RX中还存在其他SI源，包括1)带内TX热噪声的影响，它可以超过RX噪声底；2)RX LO相位噪声（PN），它与SI相互混合，进一步降低了C/I比。本文介绍了几种电路级技术，这些技术有助于减少FD无线电中TX和RX之间的相互作用。
Full-duplex (FD) radio communication potentially doubles the spectral efficiency in the densely occupied RF spectrum (100MHz to 5GHz). However, significant challenges remain, particularly the presence of a strong transmitter (TX) self-interference (SI) coupling to the receiver (RX). Numerous recent efforts on mitigating SI have focused on using active cancellation techniques [1–5]. However, these methods are challenged by either a degradation in noise performance [2], high power consumption [1,4], large silicon area [5], the inability to adequately cancel a high-output-power TX signal [3–4], or achieve a relatively narrow cancellation bandwidth [3,5]. Moreover, other sources of SI are presented to the RX, including the effects of 1) in-band TX thermal noise, which can exceed the RX noise floor, 2) the RX LO phase noise (PN), which reciprocally mixes with SI, further degrading the C/I ratio. This paper presents several circuit-level techniques, which contribute toward reducing the interaction between the TX and RX in FD radios.