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In this paper, we propose a new design of a dual-polarization near-field focused reflective metasurface for wireless power transfer. The reflective metasurface is composed of printed cross-dipole elements with different arm lengths, which is aimed to independently generate focused point with dual-polarization. Numerical simulations demonstrate that the proposed reflective metasurface can focus the...
This paper reports an experimental demonstration of a 32-Gbit/s wireless link using orbital angular momentum (OAM) and polarization multiplexing in a millimeter-wave regime at 60 GHz. Results of the analysis show that a higher carrier frequency reduces the propagation loss as well as the size of the transmitter and receiver, particularly for OAM channels with higher OAM values. Further, two different...
Security capacity improvement is always the implementation goal of physical layer security, which can be achieved by deliberate randomization based on differentia and uniqueness of wireless channels through signal processing method. An information-guided randomization secure transmission scheme is proposed combined with a spatial modulation system in which information can be carried by receiving antennas...
In this article, we address the issue of physical layer design of MIMO wireless communication system. First, we analysis the capacity of MIMO system in a limited space, then investigate the capacity varied with the number of antenna and SNR in SIMO, MISO, MIMO system. Second, we explore the design of antennas assignment and space-time coding based on the optimizing trade-off diversity gains and multiplex...
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