Full Duplex Circulator-Receiver Phased Array Employing Self-Interference Cancellation via Beamforming
Full Duplex Circulator-Receiver Phased Array Employing Self-Interference Cancellation via Beamforming
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通过波束成形采用自干扰消除的全双工循环器接收器相控阵
DOI：
10.1109/rfic.2018.8429010
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
H. Krishnaswamy
中科院分区：
文献类型：
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作者：
Mahmood Baraani Dastjerdi;Negar Reiskarimian;Tingjun Chen;G. Zussman;H. Krishnaswamy
在本文中，我们展示了如何将相控阵波束形成与全双工(FD)协同结合，以最小的链路预算(发射机(TX)和接收机(RX)阵列增益)代价实现宽带射频自干扰(SI)抑制，并且不需要额外的功率消耗。基于N路径滤波器的环行器-接收器FD前端通过其多相输出以最小的开销在基带实现相控阵波束形成。本文展示了一种65 nm可扩展的4单元全双工环行器-接收器阵列，该阵列改变了空间波束形成自由度(DOF)以实现SI抑制，使得(I)在16.25 MHz(类WiFi)带宽(BW)上实现50dBRF阵列自干扰消除(SIC)，在8个单元上的Tx和Rx阵列增益分别低于3.5/3db；(Ii)100db阵列SIC抑制，包括数字SIC at+16.5dBm Tx阵列功率处理。
In this paper, we show how phased-array beamforming can be synergistically combined with full-duplex (FD) to achieve wideband RF self-interference (SI) suppression with minimal link budget (transmitter (TX) and receiver (RX) array gain) penalty and with no additional power consumption. An N-path-filter-based circulator-receiver FD front-end enables phased-array beamforming at baseband with minimal overhead by virtue of its multi-phase outputs. A 65nm CMOS scalable 4-element full-duplex circulator-receiver array is demonstrated that repurposes spatial beamforming degrees of freedom (DoFs) to achieve SI suppression, enabling (i) 50dB overall RF array self-interference cancellation (SIC) over 16.25MHz (WiFi-like) bandwidth (BW) with less than 3.5/3dB degradation in TX and RX array gains, respectively, across 8 elements, and (ii) 100dB overall array SIC suppression including digital SIC at + 16.5dBm TX array power handling.