DFT-Based Multi-Directions Directional Modulation

Hafez M., Khattab T., Arslan H.

IEEE Wireless Communications Letters, vol.8, no.4, pp.1232-1235, 2019 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 8 Issue: 4
  • Publication Date: 2019
  • Doi Number: 10.1109/lwc.2019.2912597
  • Journal Name: IEEE Wireless Communications Letters
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1232-1235
  • Keywords: Adaptive beam-width, antenna arrays, directional modulation, physical-layer security
  • Istanbul Medipol University Affiliated: Yes


In this letter, a physically secure multi-directions directional modulation scheme is proposed. The scheme provides an adaptive beam-width assignment, where each user is granted a different beam width based on its channel condition. The scheme can be efficiently implemented using a discrete Fourier transform (DFT)-based algorithm that divides the spatial dimension into orthogonal narrow sub-beams. Each user is assigned multiple sub-beams that satisfies its pre-set direction of transmission and beam-width requirements. The scheme preserves the secrecy properties of directional modulation algorithms, where each legitimate user is guaranteed a secure communication link to its trusted receiver. The proposed scheme is practically efficient since it can be directly implemented using a DFT-based signal processing core.