Hafez, MohammedKhattab, TamerArslan, Hüseyin2019-12-312019-12-312019Hafez, M., Khattab, T. ve Arslan, H. (2019). DFT-based multi-directions directional modulation. IEEE Wireless Communications Letters, 8(4), 1232-1235. https://doi.org/10.1109/LWC.2019.29125972162-23372162-2345https://doi.org/10.1109/LWC.2019.2912597https://hdl.handle.net/20.500.12511/4830In 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.eninfo:eu-repo/semantics/openAccessAdaptive Beam-WidthAntenna ArraysDirectional ModulationPhysical-Layer SecurityArticle841232123510.1109/LWC.2019.2912597Q1Q1