A reciprocal network to mitigate cross-talk induced interference (CI) in a 2×2 Multiple Input Multiple Output (MIMO) wireless node operating in same-channel full-duplex (SCFD) mode is proposed. Reciprocal nature of channel between the two antennas of the MIMO node is exploited to simplify the design of cancellation network. A canceller board is designed and fabricated on an FR4 PCB to test the proposed technique. Measurements on the board connected to a dual-port antenna mounted in lab environment show CI cancellation of more than 55dB in 20MHz bandwidth around 2.35 GHz. Self interference (SI) is also cancelled to more than 35dB in the 20 MHz bandwidth. Measured results with modulated 20MHz +30 dBm signal applied at transmit ports are also shown. © 2019 IEEE.

Abhishek Kumar

Department of Electrical Engineering

S. Aniruddhan

Indian Institute of Technology Hyderabad (IITH) is a premier institute of science and technology established in 2008. IITH has been consistently ranked in the&nbsp;<a href="https://iith.ac.in/reports/" rel="noopener noreferrer">top 10 institutes</a>&nbsp;in India for Engineering&nbsp;<a href="https://www.nirfindia.org/2021/EngineeringRanking.html" rel="noopener noreferrer" target="_blank">according to NIRF</a>&nbsp;making it one of the most coveted schools for science and technology in the country.

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Journal	Data powered by TypesetIEEE MTT-S International Microwave Symposium Digest
Publisher	Data powered by TypesetInstitute of Electrical and Electronics Engineers Inc.
ISSN	0149645X