On analyzing beamforming implementation in O-RAN 5G

Mustafa Mohsin, Jordi Mongay Batalla, Evangelos Pallis, George Mastorakis, Evangelos K. Markakis, Constandinos X. Mavromoustakis

Research output: Contribution to journalArticlepeer-review


The open radio access network (O-RAN) concept is changing the landscape of mobile networks (5G deployment and 6G research). O-RAN Alliance’s suggestions that O-RAN can offer openness and intelligence to the traditional RAN vendors will enable the capability for multi-vendors to re-shape the RAN structure and optimize the network. This paper positions the main research challenges of the O-RAN approach in regards= to the implementation of beamforming. We investigate the O-RAN architecture and the configurations of the interfaces between O-RAN units and present the split options between the radio and distributing units in terms of O-RAN specification and 3GPP standards. From this point, we discuss the beamforming methods in O-RAN, addressing challenges and potential solutions, and suggest the introduction of the zero-forcing equalizer as a precoding vector in the channel-information-based beamforming method. This may be one of the solutions for achieving flexibility in a high-traffic communication environment while reducing the radio unit interferences caused by implanting the precoding in the open radio unit.

Original languageEnglish
Article number2162
JournalElectronics (Switzerland)
Issue number17
Publication statusPublished - Sep 2021


  • 5G
  • Beamforming
  • Massive MIMO
  • O-RAN
  • Open interface
  • Radio access network


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