List of Articles موج میلیمتری

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  1 - Millimeter-Wave Underlay D2D Communications: Channel Assignment, Transmission mode Selection and Power Control for Full-CSI and Limited-CSI Scenarios
  Nima Reisi
  10.30495/jce.2022.1962935.1166
  In this paper, we study relay-assisted underlay D2D communication operating at millimeter-wave (mmWave) band in which half-duplex/full-duplex relays may assist D2D users to improve transmission quality. Our aim is to jointly select D2D transmission mode, assign cellular More

  In this paper, we study relay-assisted underlay D2D communication operating at millimeter-wave (mmWave) band in which half-duplex/full-duplex relays may assist D2D users to improve transmission quality. Our aim is to jointly select D2D transmission mode, assign cellular resource blocks to D2D users and control the powers of users in order to maximize the aggregate data rate of the D2D users and cellular network. We focus on the main features of mmWave communication including larger bandwidth, directive antenna arrays at BS and users, and more severe path loss and shadowing. As the optimization problem is mixed-integer-non-linear programming, two heuristic algorithms are proposed, assuming full Channel Side Information (CSI) and limited CSI at Base Station, respectively. Simulation results show the superiority of utilizing FD relays over HD relays and direct transmission, especially for non-line-of-sight links, which is the dominant propagation mechanism in mmWave band. The limited CSI algorithm has considerably lower complexity. Moreover, when the number of resource blocks far exceeds the number of D2D users, the gap between full CSI and limited CSI algorithms vanishes. Manuscript profile
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  2 - Design of a Dual-Beam End-Fire Antenna using the proposed Metamaterial Structure for 60 GHz MIMO Applications
  Narges Malekpour Mohammad Amin Honarvar
  In this paper, a dual-beam end-fire Bow-tie antenna for millimeter-wave applications over 57–64 GHz is designed. By introducing a new structure in the decoration of metamaterial slabs in the horizontal plane of the Bowtie antenna, a dual-beam generated at 60° More

  In this paper, a dual-beam end-fire Bow-tie antenna for millimeter-wave applications over 57–64 GHz is designed. By introducing a new structure in the decoration of metamaterial slabs in the horizontal plane of the Bowtie antenna, a dual-beam generated at 60° and 120°. The proposed antenna is composed of a 2×3 array of metamaterial unit cells, which leads to a considerable gain enhancement and generates a dual-beam pattern. To create a dual-beam in the E-plane, the array of metamaterial slabs integrated vertically in front of the Bowtie antenna and tilted by 15o with regard to the antenna axis to tailor the radiation beam. These unit cells are capable of creating two resonances that can play an important role to improve the gain in a wide frequency band. The resulting dual-beam radiation in the E-plane has maxima at +60 and 120 degrees with a maximum peak gain of 9.5 dBi at 60 GHz. The final design simulated with a parametric study, and the best configuration provided despite the maintenance of other radiation characteristics of the antenna.Keywords: End-Fire Antenna, dual-beam Antenna, ENZ Metamaterial unit-cell, Millimeter-Wave, High-Gain Antenna. Manuscript profile