In this paper, the covertness performance of multi-input single-output (MISO) transmission system in near field communication is studied. In the near-field region, the electromagnetic are no longer plane waves, but spherical waves related to distance and direction. The near-field spherical wave has the characteristic of beam focusing and can transmit the signal energy to the legitimate receiver centrally. Even if the eavesdropper and the legitimate communication party are in the same direction, the energy received by the eavesdropper makes it difficult to accurately judge whether the transmitter has communication behavior, which is more conducive to the realization of covert communication. In this paper, the covert performance of near-field communication with a uniform linear array (ULA), a uniform planar array (UPA) and a uniform circular array (UCA) is analyzed, respectively. Additionally, the impact of receiver position on the focusing characteristics of the near-field beam is investigated. The simulation results demonstrate that when the antenna architecture of transmitter is UPA, the covert performance becomes more prominent under identical distance and direction.

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Near-Field Covert Communication Under Different Antenna Architectures

  • Luying Huang,
  • Jing Lei,
  • Wei Liu

摘要

In this paper, the covertness performance of multi-input single-output (MISO) transmission system in near field communication is studied. In the near-field region, the electromagnetic are no longer plane waves, but spherical waves related to distance and direction. The near-field spherical wave has the characteristic of beam focusing and can transmit the signal energy to the legitimate receiver centrally. Even if the eavesdropper and the legitimate communication party are in the same direction, the energy received by the eavesdropper makes it difficult to accurately judge whether the transmitter has communication behavior, which is more conducive to the realization of covert communication. In this paper, the covert performance of near-field communication with a uniform linear array (ULA), a uniform planar array (UPA) and a uniform circular array (UCA) is analyzed, respectively. Additionally, the impact of receiver position on the focusing characteristics of the near-field beam is investigated. The simulation results demonstrate that when the antenna architecture of transmitter is UPA, the covert performance becomes more prominent under identical distance and direction.