Open-Access Full-Duplex Wireless in the ORBIT and COSMOS Testbeds

Manav Kohli, Tingjun Chen, Mahmood Baraani Dastjerdi, Jackson Welles, Ivan Seskar, Harish Krishnaswamy, Gil Zussman

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In order to support experimentation with full-duplex (FD) wireless, we recently integrated two generations of FD radios in the open-Access ORBIT and COSMOS testbeds. First, we integrated a customized 1st generation (Gen-1) narrowband FD radio in the indoor ORBIT testbed. Then, we integrated two 2nd generation (Gen-2) wideband FD radios in the city-scale PAWR COSMOS testbed. Each integrated FD radio consists of an antenna, a customized RF self-interference (SI) canceller box, a USRP software-defined radio (SDR), and a remotely accessible compute node. The Gen-1/Gen-2 RF SI canceller box includes an RF canceller printed circuit board (PCB) which emulates a customized integrated circuit (IC) RF canceller implementation. The amplitude-And phase-based Gen-1 narrowband RF canceller achieves 40 dB RF SIC across 5 MHz. The Gen-2 wideband canceller is based on the technique of frequency-domain equalization (FDE) and achieves 50 dB RF SI cancellation (SIC) across 20 MHz. In this paper, we present the design and testbed integration of the two generations of FD radios. We then present example experiments that can be remotely run and modified by experimenters. Finally, we discuss future improvements and potential FD wireless experiments that can be supported by these open-Access FD radios integrated in the COSMOS testbed.

Original languageEnglish (US)
Title of host publicationWiNTECH 2020 - Proceedings of the 14th ACM Workshop on Wireless Network Testbeds, Experimental evaluation and CHaracterization, Part of ACM MobiCom 2020
PublisherAssociation for Computing Machinery
Pages9-16
Number of pages8
ISBN (Electronic)9781450380829
DOIs
StatePublished - Sep 21 2020
Event14th ACM Workshop on Wireless Network, Testbeds, Experimental Evaluation and CHaracterization, WiNTECH 2020 - London, United Kingdom
Duration: Sep 25 2020Sep 25 2020

Publication series

NameWiNTECH 2020 - Proceedings of the 14th ACM Workshop on Wireless Network Testbeds, Experimental evaluation and CHaracterization, Part of ACM MobiCom 2020

Conference

Conference14th ACM Workshop on Wireless Network, Testbeds, Experimental Evaluation and CHaracterization, WiNTECH 2020
Country/TerritoryUnited Kingdom
CityLondon
Period9/25/209/25/20

All Science Journal Classification (ASJC) codes

  • Computer Science Applications
  • Software
  • Computer Networks and Communications

Keywords

  • Full-duplex wireless
  • frequency-domain equalization
  • open-Access wireless testbeds
  • self-interference cancellation
  • software-defined radios
  • wireless experimentation

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