A full-duplex transceiver with CMOS RF circulation and code-domain signal processing for 104 dB self-interference rejection and watt level TX power handling

Ahmed Hamza; Aravind Nagulu; Hussam Alshammary; Cameron Hill; Eythan Lam; Harish Krishnaswamy; James F. Buckwalter

doi:10.1109/IMS30576.2020.9224077

A full-duplex transceiver with CMOS RF circulation and code-domain signal processing for 104 dB self-interference rejection and watt level TX power handling

Ahmed Hamza, Aravind Nagulu, Hussam Alshammary, Cameron Hill, Eythan Lam, Harish Krishnaswamy, James F. Buckwalter

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

7 Scopus citations

Abstract

This paper describes a full-duplex (FD) radio transceiver that uses CMOS RFICs to realize high power handling and linearity. A high-rejection, magnetic-less CMOS circulator at the antenna along with high-rejection, blocker-tolerant RF code-domain correlators achieve high transmitter (TX) rejection in the RF domain. Code-domain operation supports higher linearity in FD applications. Digital cancellation increases the rejection down to noise floor of a software-defined radio (SDR). We compare the role of antenna impedance in the performance of SI rejection. The measured results demonstrate more than 104 dB TX self-interference (TX-SI) rejection at 20 dBm TX power. To the best of our knowledge, this work presents the best reported TX-SI rejection at more than 20 dBm.

Original language	English
Title of host publication	IMS 2020 - 2020 IEEE/MTT-S International Microwave Symposium
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	1207-1210
Number of pages	4
ISBN (Electronic)	9781728168159
DOIs	https://doi.org/10.1109/IMS30576.2020.9224077
State	Published - Aug 2020

Publication series

Name	IEEE MTT-S International Microwave Symposium Digest
Volume	2020-August
ISSN (Print)	0149-645X

Bibliographical note

Publisher Copyright:
© 2020 IEEE.

Keywords

Circulator
CMOS
Code-domain
Full duplex (FD)
PN code
Rejection
Self-interference
Simultaneous transmit and receive (STAR)

ASJC Scopus subject areas

Radiation
Condensed Matter Physics
Electrical and Electronic Engineering

Access to Document

10.1109/IMS30576.2020.9224077

Cite this

Hamza, A., Nagulu, A., Alshammary, H., Hill, C., Lam, E., Krishnaswamy, H., & Buckwalter, J. F. (2020). A full-duplex transceiver with CMOS RF circulation and code-domain signal processing for 104 dB self-interference rejection and watt level TX power handling. In IMS 2020 - 2020 IEEE/MTT-S International Microwave Symposium (pp. 1207-1210). Article 9224077 (IEEE MTT-S International Microwave Symposium Digest; Vol. 2020-August). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/IMS30576.2020.9224077

Hamza, Ahmed ; Nagulu, Aravind ; Alshammary, Hussam et al. / A full-duplex transceiver with CMOS RF circulation and code-domain signal processing for 104 dB self-interference rejection and watt level TX power handling. IMS 2020 - 2020 IEEE/MTT-S International Microwave Symposium. Institute of Electrical and Electronics Engineers Inc., 2020. pp. 1207-1210 (IEEE MTT-S International Microwave Symposium Digest).

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title = "A full-duplex transceiver with CMOS RF circulation and code-domain signal processing for 104 dB self-interference rejection and watt level TX power handling",

abstract = "This paper describes a full-duplex (FD) radio transceiver that uses CMOS RFICs to realize high power handling and linearity. A high-rejection, magnetic-less CMOS circulator at the antenna along with high-rejection, blocker-tolerant RF code-domain correlators achieve high transmitter (TX) rejection in the RF domain. Code-domain operation supports higher linearity in FD applications. Digital cancellation increases the rejection down to noise floor of a software-defined radio (SDR). We compare the role of antenna impedance in the performance of SI rejection. The measured results demonstrate more than 104 dB TX self-interference (TX-SI) rejection at 20 dBm TX power. To the best of our knowledge, this work presents the best reported TX-SI rejection at more than 20 dBm.",

keywords = "Circulator, CMOS, Code-domain, Full duplex (FD), PN code, Rejection, Self-interference, Simultaneous transmit and receive (STAR)",

author = "Ahmed Hamza and Aravind Nagulu and Hussam Alshammary and Cameron Hill and Eythan Lam and Harish Krishnaswamy and Buckwalter, {James F.}",

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Hamza, A, Nagulu, A, Alshammary, H, Hill, C, Lam, E, Krishnaswamy, H & Buckwalter, JF 2020, A full-duplex transceiver with CMOS RF circulation and code-domain signal processing for 104 dB self-interference rejection and watt level TX power handling. in IMS 2020 - 2020 IEEE/MTT-S International Microwave Symposium., 9224077, IEEE MTT-S International Microwave Symposium Digest, vol. 2020-August, Institute of Electrical and Electronics Engineers Inc., pp. 1207-1210. https://doi.org/10.1109/IMS30576.2020.9224077

A full-duplex transceiver with CMOS RF circulation and code-domain signal processing for 104 dB self-interference rejection and watt level TX power handling. / Hamza, Ahmed; Nagulu, Aravind; Alshammary, Hussam et al.
IMS 2020 - 2020 IEEE/MTT-S International Microwave Symposium. Institute of Electrical and Electronics Engineers Inc., 2020. p. 1207-1210 9224077 (IEEE MTT-S International Microwave Symposium Digest; Vol. 2020-August).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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Hamza A, Nagulu A, Alshammary H, Hill C, Lam E, Krishnaswamy H et al. A full-duplex transceiver with CMOS RF circulation and code-domain signal processing for 104 dB self-interference rejection and watt level TX power handling. In IMS 2020 - 2020 IEEE/MTT-S International Microwave Symposium. Institute of Electrical and Electronics Engineers Inc. 2020. p. 1207-1210. 9224077. (IEEE MTT-S International Microwave Symposium Digest). doi: 10.1109/IMS30576.2020.9224077

A full-duplex transceiver with CMOS RF circulation and code-domain signal processing for 104 dB self-interference rejection and watt level TX power handling

Abstract

Publication series

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

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Cite this