Orthogonal Frequency Division Multiplexing Directional Modulation Waveform Design for Integrated Sensing and Communication Systems

Gaojian Huang, Kailuo Zhang, Yanliang Zhang, Kefei Liao, Shuanggen Jin, Yuan Ding

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Abstract

Orthogonal frequency division multiplexing (OFDM) signals have been widely studied as a potential waveform used in integrated sensing and communication (ISAC) systems. High computational effort, however, is required to estimate the azimuth of the target and suppress the interference from the non-target directions. Moreover, along the non-target directions, the transmitted confidential information can be easily intercepted by the eavesdroppers. In this paper, directional modulation (DM) technology combined with OFDM waveforms
namely, OFDM-DM, is proposed for ISAC systems. From the sensing perspective, the interference from the non-target direction can be suppressed, and three-dimensional (3-D) radar images can be calculated without consuming extra computational resources. From a communication perspective, the OFDM-DM
signals provide a secured physical-layer wireless transmission link and thus the confidential information can be securely delivered to the target. The efficacy of the proposed OFDM-DM ISAC waveforms is validated via numerical results for both sensing and communication functionalities by comparison with the traditional OFDM ISAC waveforms.
Original languageEnglish
JournalIEEE Internet of Things Journal
Early online date19 Feb 2024
DOIs
Publication statusE-pub ahead of print - 19 Feb 2024

Keywords

  • Directional modulation (DM)
  • Interference
  • OFDM
  • Radar
  • Radio frequency
  • Sensors
  • Switches
  • Wireless communication
  • integrated sensing and communication (ISAC)
  • orthogonal frequency division multiplexing (OFDM)
  • radar sensing

ASJC Scopus subject areas

  • Information Systems
  • Signal Processing
  • Hardware and Architecture
  • Computer Networks and Communications
  • Computer Science Applications

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