Self-Interference Channel Measurements for In-Band Full-Duplex Street-Level Backhaul Relays at 70 GHz

Katsuyuki Haneda, Jan Järveläinen, Aki Karttunen, Jyri Putkonen

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

3 Citations (Scopus)
183 Downloads (Pure)

Abstract

This paper reports measurements of self-interference (SI) channels in an in-band full-duplex (IBFD) relay scenario for millimeter-wave street-level backhauling. The street-level backhauling suffers from clutters surrounding the relay devices and hence SI originating from the environment may be dominant. An ultrawideband channel sounder operating at 70 GHz carrier frequency is used to measure the SI channels in a chamber, indoor window-side, indoor and outdoor corner scenarios. The transmit and receive antennas are waveguide-fed lens antennas. The measurements showed that cross-polarized feeding of waveguides to the lenses provided higher isolation than co-polarized feeding. In the corner scenario, observed minimum isolation level is 85 dB in the frequency domain, and 100 dB in the delay domain. The results confirmed that isolation is not limited by the direct coupling because of the high directivity of the lens antenna, but by the environmental coupling. Further link budget analysis for outdoor-to-indoor backhauling showed that the IBFD relay with practical transmit power is capable of enhancing the signal-to-noise ratio and hence extending the coverage, as SI at the relay receiver can be almost the same level as thermal noise.

Original languageEnglish
Title of host publication2018 IEEE 29th Annual International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2018
PublisherIEEE
Pages199-204
Number of pages6
Volume2018-September
ISBN (Electronic)9781538660096
DOIs
Publication statusPublished - 18 Dec 2018
MoE publication typeA4 Article in a conference publication
EventIEEE International Symposium on Personal, Indoor and Mobile Radio Communications - Polo Congressuale, Bologna, Italy
Duration: 9 Sep 201812 Sep 2018
Conference number: 29
http://pimrc2018.ieee-pimrc.org/

Publication series

Name IEEE International Symposium on Personal, Indoor, and Mobile Radio Communications workshops
PublisherIEEE
ISSN (Print)2166-9570
ISSN (Electronic)2166-9589

Conference

ConferenceIEEE International Symposium on Personal, Indoor and Mobile Radio Communications
Abbreviated titleIEEE PIMRC
CountryItaly
CityBologna
Period09/09/201812/09/2018
Internet address

Keywords

  • Backhaul
  • In-band full-duplex
  • Millimeter-wave
  • Relay
  • Self-interference

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