Widely Linear Beamforming for Full-Duplex Joint Communications and Sensing: an Investigation on Virtual Displacement of Array Elements during Local Optimization

Hadi Alidoustaghdam*, Yang Miao, Andre Kokkeler

*Corresponding author for this work

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

1 Citation (Scopus)
33 Downloads (Pure)


In this paper, we have a closer look at widely linear beamforming (WLB) for full-duplex Joint Communication and Sensing (JCAS). WLB is a powerful method for mitigating the effect of IQ imbalances in array radiation. In full-duplex JCAS, the transmitting aperture radiates multi-beams focusing towards the communication user and the sensing target, while simultaneously the receiving aperture receives sensing signals. When applying WLB intended for interference mitigation between the transmitting and receiving apertures, mirror beams often occur and degrade the mitigation effect. In this paper, we propose to use virtual displacement of array elements during local optimization in WLB to further reduce the mirror beams. The virtual displacement is to deviate the antenna elements virtually in WLB optimization process and, in the numerical analysis, we show that this can be a solution for interference mitigation while we use uniform arrays in practice. This approach can facilitate the usage of modular hardware for JCAS.

Original languageEnglish
Title of host publication2022 16th European Conference on Antennas and Propagation, EuCAP 2022
ISBN (Electronic)9788831299046
Publication statusPublished - 11 May 2022
Event16th European Conference on Antennas and Propagation, EuCAP 2022 - Madrid, Spain, Madrid, Spain
Duration: 27 Mar 20221 Apr 2022
Conference number: 16


Conference16th European Conference on Antennas and Propagation, EuCAP 2022
Abbreviated titleEuCAP 2022


  • 6G
  • interference mitigation
  • joint communication and sensing
  • 22/2 OA procedure

Cite this