In-Band Full-Duplex Antenna Beamforming and Synchronization for Self-Interference Mitigation: Multi-Tile RFSoC Testbed Design and Deployment
Paper i proceeding, 2025

This paper presents a newly developed in-band full-duplex (IBFD) communication and sensing testbed utilizing digital beamforming on the advanced Xilinx ZCU216 Radio Frequency System-on-Chip (RFSoC) platform, featuring 16 DACs and 16 ADCs with 14-bit resolution divided into four tiles. Key design and deployment challenges include achieving precise phase synchronization across multiple RFSoC tiles (due to independent clocks causing random phase shifts) and mitigating self-interference (SI) caused by strong mutual coupling effects between closely spaced transmitting (Tx) and receiving (Rx) antenna arrays. To address these challenges, we employed a Tx beamforming algorithm for maximum antenna gain and an Rx beamforming method to maximize the signal-to-self-interference ratio (SSIR) at the receiver output. Specifications of two 1 x 5 Vivaldi antenna arrays (3-6 GHz), integrated into our RFSoC-based testbed, and the multi-tile synchronization (MTS) framework were established to meet IBFD performance requirements. The deployment involved implementing the beam-forming algorithms, configuring the Tx and Rx arrays, and ensuring calibration and synchronization across RFSoC tiles. Experimental results demonstrate over 80 dB SI suppression with half-wavelength separation (@6 GHz) between the Tx and Rx arrays, highlighting the testbed's potential for applications in 6G integrated communication and radar sensing.

6G communication and sensing

in-band full duplex

beamforming

Phased arrays

RF SoC

measurements

Författare

Mustafa Ayebe

Chalmers, Elektroteknik, Kommunikation, Antenner och Optiska Nätverk

Rob Maaskant

Chalmers, Elektroteknik, Kommunikation, Antenner och Optiska Nätverk

Marianna Ivashina

Chalmers, Elektroteknik, Kommunikation, Antenner och Optiska Nätverk

Johan Malmstrom

Saab

Sten Gunnarsson

Saab

Henrik Holter

Ericsson AB

Simon Westergren

Student vid Chalmers

Erik Johansson

Student vid Chalmers

Eucap 2025 19th European Conference on Antennas and Propagation


9788831299107 (ISBN)

19th European Conference on Antennas and Propagation, EuCAP 2025
Stockholm, Sweden,

Ämneskategorier (SSIF 2025)

Annan elektroteknik och elektronik

Kommunikationssystem

Telekommunikation

DOI

10.23919/EuCAP63536.2025.10999554

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Senast uppdaterat

2025-06-18