CSI-based NOMA for Integrated Sensing and Communication

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Memisoglu E., Turkmen H., Ozbakis B. A., ARSLAN H.

IEEE Wireless Communications Letters, vol.12, no.6, pp.1086-1090, 2023 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 12 Issue: 6
  • Publication Date: 2023
  • Doi Number: 10.1109/lwc.2023.3262280
  • Journal Name: IEEE Wireless Communications Letters
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Compendex, INSPEC
  • Page Numbers: pp.1086-1090
  • Keywords: channel state information (CSI), Integrated sensing and communication, iterative channel estimation, non-orthogonal multiple access (NOMA), uplink
  • Istanbul Medipol University Affiliated: Yes

Abstract

Integrated sensing and communication (ISAC) is a key enabler of beyond fifth-generation networks and a multitude of futuristic applications. However, the coexistence, scheduling and spectrum scarcity issues due to additional sensing signals are valid concerns. A communicating device requiring sensing can use its communication signal for sensing. However, a non-communicating device requiring sensing will need to transmit additional sensing signals, increasing traffic in the network. Thus, in this letter, a novel ISAC with iterative channel estimation (ISAC-ICE) method is proposed to provide spectral efficiency while maintaining sensing and communication performance. The proposed method attains this by enabling the multi-channel estimation from received non-orthogonal communication and sensing signals for uplink transmission. The simulation results and complexity analysis demonstrate that the proposed method enables non-orthogonal multiple accessing (NOMA) of ISAC with a linearithmic complexity.