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Full duplex circulator-receiver phased array employing self-interference cancellation via beamforming

Publication ,  Conference
Dastjerdi, MB; Reiskarimian, N; Chen, T; Zussman, G; Krishnaswamy, H
Published in: Digest of Papers - IEEE Radio Frequency Integrated Circuits Symposium
August 7, 2018

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.

Duke Scholars

Published In

Digest of Papers - IEEE Radio Frequency Integrated Circuits Symposium

DOI

ISSN

1529-2517

Publication Date

August 7, 2018

Volume

2018-June

Start / End Page

108 / 111
 

Citation

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Dastjerdi, M. B., Reiskarimian, N., Chen, T., Zussman, G., & Krishnaswamy, H. (2018). Full duplex circulator-receiver phased array employing self-interference cancellation via beamforming. In Digest of Papers - IEEE Radio Frequency Integrated Circuits Symposium (Vol. 2018-June, pp. 108–111). https://doi.org/10.1109/RFIC.2018.8429010
Dastjerdi, M. B., N. Reiskarimian, T. Chen, G. Zussman, and H. Krishnaswamy. “Full duplex circulator-receiver phased array employing self-interference cancellation via beamforming.” In Digest of Papers - IEEE Radio Frequency Integrated Circuits Symposium, 2018-June:108–11, 2018. https://doi.org/10.1109/RFIC.2018.8429010.
Dastjerdi MB, Reiskarimian N, Chen T, Zussman G, Krishnaswamy H. Full duplex circulator-receiver phased array employing self-interference cancellation via beamforming. In: Digest of Papers - IEEE Radio Frequency Integrated Circuits Symposium. 2018. p. 108–11.
Dastjerdi, M. B., et al. “Full duplex circulator-receiver phased array employing self-interference cancellation via beamforming.” Digest of Papers - IEEE Radio Frequency Integrated Circuits Symposium, vol. 2018-June, 2018, pp. 108–11. Scopus, doi:10.1109/RFIC.2018.8429010.
Dastjerdi MB, Reiskarimian N, Chen T, Zussman G, Krishnaswamy H. Full duplex circulator-receiver phased array employing self-interference cancellation via beamforming. Digest of Papers - IEEE Radio Frequency Integrated Circuits Symposium. 2018. p. 108–111.

Published In

Digest of Papers - IEEE Radio Frequency Integrated Circuits Symposium

DOI

ISSN

1529-2517

Publication Date

August 7, 2018

Volume

2018-June

Start / End Page

108 / 111