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Electronics and Telecommunications Research Institute (한국전자통신연구원)
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Frequency divided group beamforming with sparse space-frequency code for above 6 GHz URLLC systems

  • Chanho, Yoon (Telecommunications and Media Research Laboratory, Electronics Telecommunications Research Institute) ;
  • Woncheol, Cho (Telecommunications and Media Research Laboratory, Electronics Telecommunications Research Institute) ;
  • Kapseok, Chang (Telecommunications and Media Research Laboratory, Electronics Telecommunications Research Institute) ;
  • Young-Jo, Ko (Telecommunications and Media Research Laboratory, Electronics Telecommunications Research Institute)
  • Received : 2022.05.31
  • Accepted : 2022.10.21
  • Published : 2022.12.10
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Abstract

In this study, we propose a limited feedback-based frequency divided group beamforming with sparse space-frequency transmit diversity coded orthogonal frequency division multiplexing (OFDM) system for ultrareliable low latency communication (URLLC) scenario. The proposed scheme has several advantages over the traditional hybrid beamforming approach, including not requiring downlink channel state information for baseband precoding, supporting distributed multipoint transmission structures for diversity, and reducing beam sweeping latency with little uplink overhead. These are all positive aspects of physical layer characteristics intended for URLLC. It is suggested in the system to manage the multipoint transmission structure realized by distributed panels using a power allocation method based on cooperative game theory. Link-level simulations demonstrate that the proposed scheme offers reliability by achieving both higher diversity order and array gain in a nonline-of-sight channel of selectivity and limited spatial scattering.

Keywords

Acknowledgement

This work was supported by the Institute of Information and communications Technology Planning and Evaluation (IITP) grant funded by the Korea government (MSIT) (no. 2018-0-00218, Speciality Laboratory for Wireless Backhaul Communications based on Very High Frequency).

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