Optimized precoders for vehicular massive MIMO radcom systems

Temiz M., Alsusa E., Baidas M. W.

Joint 30th European Conference on Networks and Communications and 3rd 6G Summit, EuCNC/6G Summit 2021, Virtual, Porto, Portugal, 8 - 11 June 2021, pp.574-579 identifier

  • Publication Type: Conference Paper / Full Text
  • Doi Number: 10.1109/eucnc/6gsummit51104.2021.9482512
  • City: Virtual, Porto
  • Country: Portugal
  • Page Numbers: pp.574-579
  • Keywords: 6G networks, Massive MIMO, OFDM radar, Power allocation, Radar and communication, Spectrum sharing
  • Middle East Technical University Affiliated: No

Abstract

This paper proposes optimized precoders for dual-functional radar and communication (RadCom) systems to maximize the sum-rate (SR) while satisfying radar target detection and user data rate constraints towards 6G networks. For this purpose, a RadCom precoder scheme that exploits radar interference is utilized with massive multiple-input-multiple-output (MIMO) orthogonal frequency-division multiplexing (OFDM) systems. Firstly, the communication capacity and radar detection performance metrics are analytically derived. Then, optimum precoders that utilize these analytical expressions are designed via convex optimization to maximize the SR with modest computational complexity. The analytical results are also verified by simulations. The results show that the optimized precoder can substantially enhance the SR compared to the benchmark methods.