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Wideband Full-Duplex Phased Array with Joint Transmit and Receive Beamforming: Optimization and Rate Gains

Publication ,  Journal Article
Chen, T; Dastjerdi, MB; Krishnaswamy, H; Zussman, G
Published in: IEEE/ACM Transactions on Networking
August 1, 2021

Full-duplex (FD) wireless and phased arrays are both promising techniques that can significantly improve data rates in future wireless networks. However, integrating FD with transmit (Tx) and receive (Rx) phased arrays is extremely challenging, due to the large number of self-interference (SI) channels. Previous work relies on either RF canceller hardware or on analog/digital Tx beamforming (TxBF) to achieve SI cancellation (SIC). However, Rx beamforming (RxBF) and the data rate gain introduced by FD nodes employing beamforming have not been considered yet. We study FD phased arrays with joint TxBF and RxBF with the objective of achieving improved FD data rates. The key idea is to carefully select the TxBF and RxBF weights to achieve wideband RF SIC in the spatial domain with minimal TxBF and RxBF gain losses. Essentially, TxBF and RxBF are repurposed, thereby not requiring specialized RF canceller circuitry. We formulate the corresponding optimization problem and develop an iterative algorithm to obtain an approximate solution with provable performance guarantees. Using SI channel measurements and datasets, we extensively evaluate the performance of the proposed approach in different use cases under various network settings. The results show that an FD phased array with 9/36/72 elements can cancel the total SI power to below the noise floor with sum TxBF and RxBF gain losses of 10.6/7.2/6.9dB, even at Tx power level of 30dBm. Moreover, the corresponding FD rate gains are at least 1.33/1.66/1.68 $\times $.

Duke Scholars

Published In

IEEE/ACM Transactions on Networking

DOI

EISSN

1558-2566

ISSN

1063-6692

Publication Date

August 1, 2021

Volume

29

Issue

4

Start / End Page

1591 / 1604

Related Subject Headings

  • Networking & Telecommunications
  • 4606 Distributed computing and systems software
  • 4006 Communications engineering
  • 1005 Communications Technologies
  • 0906 Electrical and Electronic Engineering
  • 0805 Distributed Computing
 

Citation

APA
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ICMJE
MLA
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Chen, T., Dastjerdi, M. B., Krishnaswamy, H., & Zussman, G. (2021). Wideband Full-Duplex Phased Array with Joint Transmit and Receive Beamforming: Optimization and Rate Gains. IEEE/ACM Transactions on Networking, 29(4), 1591–1604. https://doi.org/10.1109/TNET.2021.3069125
Chen, T., M. B. Dastjerdi, H. Krishnaswamy, and G. Zussman. “Wideband Full-Duplex Phased Array with Joint Transmit and Receive Beamforming: Optimization and Rate Gains.” IEEE/ACM Transactions on Networking 29, no. 4 (August 1, 2021): 1591–1604. https://doi.org/10.1109/TNET.2021.3069125.
Chen T, Dastjerdi MB, Krishnaswamy H, Zussman G. Wideband Full-Duplex Phased Array with Joint Transmit and Receive Beamforming: Optimization and Rate Gains. IEEE/ACM Transactions on Networking. 2021 Aug 1;29(4):1591–604.
Chen, T., et al. “Wideband Full-Duplex Phased Array with Joint Transmit and Receive Beamforming: Optimization and Rate Gains.” IEEE/ACM Transactions on Networking, vol. 29, no. 4, Aug. 2021, pp. 1591–604. Scopus, doi:10.1109/TNET.2021.3069125.
Chen T, Dastjerdi MB, Krishnaswamy H, Zussman G. Wideband Full-Duplex Phased Array with Joint Transmit and Receive Beamforming: Optimization and Rate Gains. IEEE/ACM Transactions on Networking. 2021 Aug 1;29(4):1591–1604.

Published In

IEEE/ACM Transactions on Networking

DOI

EISSN

1558-2566

ISSN

1063-6692

Publication Date

August 1, 2021

Volume

29

Issue

4

Start / End Page

1591 / 1604

Related Subject Headings

  • Networking & Telecommunications
  • 4606 Distributed computing and systems software
  • 4006 Communications engineering
  • 1005 Communications Technologies
  • 0906 Electrical and Electronic Engineering
  • 0805 Distributed Computing