Frequency-Domain-Equalization-based Full-Duplex Receiver with Passive-Frequency-Shifting N-Path Filters Achieving >53 dB SI Suppression Across 160 MHz BW

Sastry Garimella; Sasank Garikapati; Aravind Nagulu; Igor Kadota; Alfred Davidson; Gil Zussman; Harish Krishnaswamy

doi:10.1109/RFIC54547.2023.10186132

Frequency-Domain-Equalization-based Full-Duplex Receiver with Passive-Frequency-Shifting N-Path Filters Achieving >53 dB SI Suppression Across 160 MHz BW

Sastry Garimella, Sasank Garikapati, Aravind Nagulu^*, Igor Kadota, Alfred Davidson, Gil Zussman, Harish Krishnaswamy

^*Corresponding author for this work

Electrical and Computer Engineering

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

7 Scopus citations

Abstract

Wideband full-duplex (FD) transceivers pose a significant challenge as they require >100dB of self-interference cancellation (SIC) over large bandwidths. This work utilizes (i) a near-zero-power rotary clock-path passive frequency shifting technique for N-path filters while requiring only a single common LO signal across all filters, and (ii) a closed-loop adaptation algorithm to find the optimal configurations of various RF canceler filters using analytical modelling of tap non-idealities caused by frequency shifting and quality factor variations. The FD receiver achieves (i) tunable operation from 200MHz to 1GHz, (ii) wideband SI suppression of up to 53dB across 160MHz BW when operating at 720MHz (4.44x more fractional bandwidth (FBW) compared to [1]), (iii) a power consumption of 1.8mW/DoF (degree of freedom for each tap, almost 2x better than [1]), while (iv) handling TX power of up to +15dBm across an initial circulator isolation of 26dB.

Original language	English (US)
Title of host publication	2023 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2023
Editors	Jennifer Kitchen, Steven Turner
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	225-228
Number of pages	4
ISBN (Electronic)	9798350321227
DOIs	https://doi.org/10.1109/RFIC54547.2023.10186132
State	Published - 2023
Event	2023 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2023 - San Diego, United States Duration: Jun 11 2023 → Jun 13 2023

Publication series

Name	Digest of Papers - IEEE Radio Frequency Integrated Circuits Symposium
Volume	2023-June
ISSN (Print)	1529-2517

Conference

Conference	2023 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2023
Country/Territory	United States
City	San Diego
Period	6/11/23 → 6/13/23

Funding

ACKNOWLEDGMENT This work was supported by DARPA WARP.

ASJC Scopus subject areas

General Engineering

Access to Document

10.1109/RFIC54547.2023.10186132

Cite this

Garimella, S., Garikapati, S., Nagulu, A., Kadota, I., Davidson, A., Zussman, G., & Krishnaswamy, H. (2023). Frequency-Domain-Equalization-based Full-Duplex Receiver with Passive-Frequency-Shifting N-Path Filters Achieving >53 dB SI Suppression Across 160 MHz BW. In J. Kitchen, & S. Turner (Eds.), 2023 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2023 (pp. 225-228). (Digest of Papers - IEEE Radio Frequency Integrated Circuits Symposium; Vol. 2023-June). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/RFIC54547.2023.10186132

Garimella, Sastry ; Garikapati, Sasank ; Nagulu, Aravind et al. / Frequency-Domain-Equalization-based Full-Duplex Receiver with Passive-Frequency-Shifting N-Path Filters Achieving >53 dB SI Suppression Across 160 MHz BW. 2023 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2023. editor / Jennifer Kitchen ; Steven Turner. Institute of Electrical and Electronics Engineers Inc., 2023. pp. 225-228 (Digest of Papers - IEEE Radio Frequency Integrated Circuits Symposium).

@inproceedings{4a9958b4b457497e95d65483e5798da6,

title = "Frequency-Domain-Equalization-based Full-Duplex Receiver with Passive-Frequency-Shifting N-Path Filters Achieving >53 dB SI Suppression Across 160 MHz BW",

abstract = "Wideband full-duplex (FD) transceivers pose a significant challenge as they require >100dB of self-interference cancellation (SIC) over large bandwidths. This work utilizes (i) a near-zero-power rotary clock-path passive frequency shifting technique for N-path filters while requiring only a single common LO signal across all filters, and (ii) a closed-loop adaptation algorithm to find the optimal configurations of various RF canceler filters using analytical modelling of tap non-idealities caused by frequency shifting and quality factor variations. The FD receiver achieves (i) tunable operation from 200MHz to 1GHz, (ii) wideband SI suppression of up to 53dB across 160MHz BW when operating at 720MHz (4.44x more fractional bandwidth (FBW) compared to [1]), (iii) a power consumption of 1.8mW/DoF (degree of freedom for each tap, almost 2x better than [1]), while (iv) handling TX power of up to +15dBm across an initial circulator isolation of 26dB.",

author = "Sastry Garimella and Sasank Garikapati and Aravind Nagulu and Igor Kadota and Alfred Davidson and Gil Zussman and Harish Krishnaswamy",

note = "Funding Information: ACKNOWLEDGMENT This work was supported by DARPA WARP. Publisher Copyright: {\textcopyright} 2023 IEEE.; 2023 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2023 ; Conference date: 11-06-2023 Through 13-06-2023",

year = "2023",

doi = "10.1109/RFIC54547.2023.10186132",

language = "English (US)",

series = "Digest of Papers - IEEE Radio Frequency Integrated Circuits Symposium",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

pages = "225--228",

editor = "Jennifer Kitchen and Steven Turner",

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Garimella, S, Garikapati, S, Nagulu, A, Kadota, I, Davidson, A, Zussman, G & Krishnaswamy, H 2023, Frequency-Domain-Equalization-based Full-Duplex Receiver with Passive-Frequency-Shifting N-Path Filters Achieving >53 dB SI Suppression Across 160 MHz BW. in J Kitchen & S Turner (eds), 2023 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2023. Digest of Papers - IEEE Radio Frequency Integrated Circuits Symposium, vol. 2023-June, Institute of Electrical and Electronics Engineers Inc., pp. 225-228, 2023 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2023, San Diego, United States, 6/11/23. https://doi.org/10.1109/RFIC54547.2023.10186132

Frequency-Domain-Equalization-based Full-Duplex Receiver with Passive-Frequency-Shifting N-Path Filters Achieving >53 dB SI Suppression Across 160 MHz BW. / Garimella, Sastry; Garikapati, Sasank; Nagulu, Aravind et al.
2023 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2023. ed. / Jennifer Kitchen; Steven Turner. Institute of Electrical and Electronics Engineers Inc., 2023. p. 225-228 (Digest of Papers - IEEE Radio Frequency Integrated Circuits Symposium; Vol. 2023-June).

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

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AU - Zussman, Gil

AU - Krishnaswamy, Harish

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AB - Wideband full-duplex (FD) transceivers pose a significant challenge as they require >100dB of self-interference cancellation (SIC) over large bandwidths. This work utilizes (i) a near-zero-power rotary clock-path passive frequency shifting technique for N-path filters while requiring only a single common LO signal across all filters, and (ii) a closed-loop adaptation algorithm to find the optimal configurations of various RF canceler filters using analytical modelling of tap non-idealities caused by frequency shifting and quality factor variations. The FD receiver achieves (i) tunable operation from 200MHz to 1GHz, (ii) wideband SI suppression of up to 53dB across 160MHz BW when operating at 720MHz (4.44x more fractional bandwidth (FBW) compared to [1]), (iii) a power consumption of 1.8mW/DoF (degree of freedom for each tap, almost 2x better than [1]), while (iv) handling TX power of up to +15dBm across an initial circulator isolation of 26dB.

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Garimella S, Garikapati S, Nagulu A, Kadota I, Davidson A, Zussman G et al. Frequency-Domain-Equalization-based Full-Duplex Receiver with Passive-Frequency-Shifting N-Path Filters Achieving >53 dB SI Suppression Across 160 MHz BW. In Kitchen J, Turner S, editors, 2023 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2023. Institute of Electrical and Electronics Engineers Inc. 2023. p. 225-228. (Digest of Papers - IEEE Radio Frequency Integrated Circuits Symposium). doi: 10.1109/RFIC54547.2023.10186132

Frequency-Domain-Equalization-based Full-Duplex Receiver with Passive-Frequency-Shifting N-Path Filters Achieving >53 dB SI Suppression Across 160 MHz BW

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ASJC Scopus subject areas

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